CA2313397A1 - Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel - Google Patents
Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel Download PDFInfo
- Publication number
- CA2313397A1 CA2313397A1 CA002313397A CA2313397A CA2313397A1 CA 2313397 A1 CA2313397 A1 CA 2313397A1 CA 002313397 A CA002313397 A CA 002313397A CA 2313397 A CA2313397 A CA 2313397A CA 2313397 A1 CA2313397 A1 CA 2313397A1
- Authority
- CA
- Canada
- Prior art keywords
- ratchet wheel
- arcuate concave
- sides
- concave teeth
- teeth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
- B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
- B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
- B25B13/463—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel
Abstract
A ratchet wheel includes an outer periphery. The outer periphery includes a number of arcuate concave teeth each having two sides and an intersection of the two sides. The ratchet wheel includes a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions, thereby forming asymmetric arcuate concave teeth to provide improved structural strength and improved torque. In another embodiment, the concave teeth are non-arcuate to reduce the formation time for the teeth, thereby reducing the production cost.
Description
1 R.~TCHET WHEEL WITH A YMM T 1C' AR('iIAT ON AVE TE TH OR
2 NON-ARCi~ATE CONCAV T TH AND AT H TIN TOO WITH ~i ~CH
3 RATCHET WH ~ .
4 Bac roend of the Iriventinn 1 Field of the Invention 6 The present invention relates to a ratchet wheel with asymmetric arcuate concave teeth 7 or non-arcuate concave teeth. The present invention also relates to a ratcheting tool, e.g., a ring 8 spanner having a box end in which the ratchet wheel is mounted. The ratchet wheel with 9 asymmetric arcuate concave teeth provides improved structural strength and improved torque.
The ratchet wheel with non-arcuate concave teeth is easy to form and thus reduces the 11 production cost.
12 2. Description of hP RPlatPrl Art 13 A wide variety of spanners and wrenches have heretofore been provided. Ring spanners 14 are the best choice for driving fasteners (e.g., nuts, bolt heads, etc) in a limited space that is uneasy to access and difficult to operate all kinds of ratcheting tools.
Nevertheless, 16 conventional ring spanners have low driving torque. Ratchet type ring spanners have been 17 proposed to solve this problem. A ratchet wheel is mounted in the box end of a ring spanner 18 for driving fasteners at high torque. It is, however, found that, the structural strength of the 19 ratchet wheel is weak, as an outer periphery of the ratchet wheel is processed to form a plurality of arcuate teeth with a considerable depth.
21 Figs. 11 through 13 of the drawings illustrate a conventional ratchet wheel 1 mounted in 22 a box end (not shown) of a ring spanner (not shown) and having an inner periphery 4 for 23 driving a fastener (not shown) and an outer periphery having a plurality of arcuate concave 24 teeth 3. Referring to Fig. 12, each arcuate concave tooth 3 is formed by means of feeding a cutter 2 along a direction transverse to a radial direction (see line OR). The resultant concave 26 tooth 3 has a depth "d" and two sides that intersect at point "R". The line OR divides the angle 27 a defined by the two sides of the arcuate concave tooth 3 into two equal portions (usually 1 45° for each portion). As illustrated in Fig. 12, each arcuate concave tooth 3 is machined to 2 have a considerable depth "d" that adversely affects the structural strength of the ratchet wheel 3 l, as the remaining wall thickness "t" of the ratchet wheel 1 is relatively small. As a result, the 4 driving torque provided by the ratchet wheel for driving the fastener is limited.
Figs. 14 through 16 of the drawings illustrate a conventional ratchet wheel 5 mounted in 6 a box end 9a (Fig. 17) of a ring spanner 9 (Fig. 17) and having an inner periphery 8 for driving 7 a fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 6.
8 Referring to Fig. 15, each arcuate concave tooth 6 is formed by means of feeding a cutter 7 9 along a radial direction. The resultant arcuate concave tooth 6 has a depth "d" and two sides that intersect at point "R". The line OR divides the angle /3 defined by the two sides of the 11 concave tooth 6 into two equal portions (usually 45° for each portion). As illustrated in Fig. 15, 12 each arcuate concave tooth 6 is machined to have a considerable depth "d"
that adversely 13 affects the structural strength of the ratchet wheel, as the remaining wall thickness "t" of the 14 ratchet wheel 5 is relatively small. As a result, the driving torque provided by the ratchet wheel for driving the fastener is limited. Such structure has been disclosed in U.S. Patent No.
16 5,533,427 to Chow issued on Jul. 9, 1996, which is incorporated herein for reference. A
17 further drawback of this conventional ratchet wheel is the low production rate for forming the 18 arcuate concave teeth by cutting.
19 The present invention is intended to provide an improved ratchet wheel that mitigates and/or obviates the above problems.
21 Summary of the Invention 22 It is a primary object of the present invention to provide an improved ratchet wheel has 23 asymmetric arcuate concave teeth for providing improved structural strength and improved 24 torque.
It is another object of the present invention to provide an improved ratchet wheel that 26 has non-arcuate concave teeth to allow higher production rate, as the non-arcuate concave 27 teeth can be formed by means of roll squeezing method, investment casting, or molding. The 1 non-arcuate concave teeth may be symmetric or asymmetric. The ratchet wheel with non-2 arcuate concave teeth may bear higher torque during ratcheting (i.e., tightening or loosening a 3 fastener).
4 The present invention also provides a ratcheting tool, e.g., a spanner, equipped with a ratchet wheel in accordance with the present invention. In an embodiment of the invention, the 6 spanner has a box end for receiving a ratcheting wheel with asymmetric arcuate concave teeth.
7 In another embodiment of the invention, the spanner has a box end for receiving a ratcheting 8 wheel with non-arcuate asymmetric concave teeth. In a further embodiment of the invention, 9 the spanner has a box end for receiving a ratcheting wheel with non-arcuate symmetric concave teeth.
11 Other objects, advantages, and novel features of the invention will become more 12 apparent from the following detailed description when taken in conjunction with the 13 accompanying drawings.
1 S Fig. 1 is a perspective view of a ratchet wheel with asymmetric arcuate concave teeth in 16 accordance with the present invention;
17 Fig. 2 is a side view of the ratchet wheel in accordance with the present invention;
18 Fig. 3 is a top view of the ratchet wheel in accordance with the present invention, 19 illustrating formation of asymmetric arcuate concave teeth in an outer periphery of the ratchet wheel;
21 Fig. 4 is a top view of a box end of a ring spanner equipped with the ratchet wheel in 22 accordance with the present invention;
23 Fig. 5 is a sectional view taken along line 5-5 in Fig. 4;
24 Fig. 6 is a top view, in an enlarged scale, of the ratchet wheel in accordance with the present invention, wherein position of symmetric concave teeth formed according to prior art 26 is illustrated to show difference therebetween;
1 Fig. 7a is a perspective view of a pawl for cooperating with the asymmetric arcuate 2 concave teeth of the ratchet wheel in accordance with the present invention;
3 Fig. 7b is a top view of the pawl in Fig. 7a;
4 Fig. 7c is a side view of the pawl in Fig. 7a;
Fig. 8a is a perspective view of a conventional pawl for cooperating with the arcuate 6 concave teeth of the ratchet wheel in Fig. 14;
7 Fig. 8b is a top view of the pawl in Fig. 8a;
8 Fig. 8c is a side view of the pawl in Fig. 8a;
9 Fig. 9 is an enlarged fragmentary view illustrating operation of the pawl and the asymmetric arcuate concave teeth of the ratchet wheel in accordance with the present 11 invention;
12 Fig. 10 is a schematic force diagram of the asymmetric arcuate concave tooth of the 13 ratchet wheel in accordance with the present invention;
14 Fig. 11 is a perspective view of a ratchet wheel according to prior art;
Fig. 12 is a top view of the ratchet wheel in Fig. 11;
16 Fig. 13 is a side view of the ratchet wheel in Fig. 11;
17 Fig. 14 is a perspective view of another ratchet wheel according to prior art;
18 Fig. 15 is a top view of the ratchet wheel in Fig. 14;
19 Fig. 16 is a side view of the ratchet wheel in Fig. 14;
Fig. 17 is a top view of a box end of a ring spanner equipped with the ratchet wheel in 21 Fig. 14;
22 Fig. 18 is an enlarged fragmentary view illustrating operation of the conventional pawl 23 and the symmetric arcuate concave teeth of the conventional ratchet wheel in the ring spanner 24 Fig. l7;
Fig. 19 is a schematic force diagram of the ratchet wheel in Fig. 14;
26 Fig. 20 is a sectional view taken along line 20-20 in Fig. 17;
1 Fig. 21 is a perspective view of a ratchet wheel with non-arcuate concave teeth in 2 accordance with the present invention;
3 Fig. 22 is a side view of the ratchet wheel in Fig. 21;
4 Fig. 23 is a top view of a box end of a ring spanner equipped with the ratchet wheel in Fig 21;
6 Fig. 24 is a sectional view taken along line 24-24 in Fig. 23;
7 Fig. 25 is a top view of the ratchet wheel in Fig. 21, wherein position of symmetric 8 concave teeth formed according to prior art is illustrated to show difference therebetween;
9 Fig. 26a is a perspective view of a pawl for cooperating with the non-arcuate concave teeth of the ratchet wheel in Fig. 23;
11 Fig. 26b is a top view of the pawl in Fig. 26a; and 12 Fig. 26c is a side view of the pawl in Fig. 26a.
13 Detailed Description of the Pr fprrp~l F bodimentc 14 Referring to Figs. 1 through 9 and initially to Figs. 1 through 3, a ratchet wheel 20 in accordance with the present invention generally includes an inner periphery 24 for driving a 16 fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 22.
17 Referring to Fig. 3, each arcuate concave tooth 22 is formed by means of feeding a cutter 26 18 along a direction transverse to a radial direction (see line OR). The resultant concave tooth 22 19 has a depth "d~" and two sides RA and RB that intersect at point "R". The line OR divides the angle 8 defined by the two sides RA and RB of the concave tooth 22 into two unequal 21 portions (e.g., 30° and 60°, 40° and 50°, etc).
Namely, every tooth 22 thus formed is 22 "asymmetric", or the two sides for each teeth 22 is not equal, which is the most important 23 feature of this embodiment of the present invention. As illustrated in Fig.
3, each concave 24 tooth 22 is machined to have a depth "dl" that will not adversely affect the structural strength of the ratchet wheel, as the remaining wall thickness "ti" of the ratchet wheel 20 is still 26 relatively large. As a result, the ratchet wheel 20 may bear a relatively large driving torque for 27 driving the fastener.
The ratchet wheel with non-arcuate concave teeth is easy to form and thus reduces the 11 production cost.
12 2. Description of hP RPlatPrl Art 13 A wide variety of spanners and wrenches have heretofore been provided. Ring spanners 14 are the best choice for driving fasteners (e.g., nuts, bolt heads, etc) in a limited space that is uneasy to access and difficult to operate all kinds of ratcheting tools.
Nevertheless, 16 conventional ring spanners have low driving torque. Ratchet type ring spanners have been 17 proposed to solve this problem. A ratchet wheel is mounted in the box end of a ring spanner 18 for driving fasteners at high torque. It is, however, found that, the structural strength of the 19 ratchet wheel is weak, as an outer periphery of the ratchet wheel is processed to form a plurality of arcuate teeth with a considerable depth.
21 Figs. 11 through 13 of the drawings illustrate a conventional ratchet wheel 1 mounted in 22 a box end (not shown) of a ring spanner (not shown) and having an inner periphery 4 for 23 driving a fastener (not shown) and an outer periphery having a plurality of arcuate concave 24 teeth 3. Referring to Fig. 12, each arcuate concave tooth 3 is formed by means of feeding a cutter 2 along a direction transverse to a radial direction (see line OR). The resultant concave 26 tooth 3 has a depth "d" and two sides that intersect at point "R". The line OR divides the angle 27 a defined by the two sides of the arcuate concave tooth 3 into two equal portions (usually 1 45° for each portion). As illustrated in Fig. 12, each arcuate concave tooth 3 is machined to 2 have a considerable depth "d" that adversely affects the structural strength of the ratchet wheel 3 l, as the remaining wall thickness "t" of the ratchet wheel 1 is relatively small. As a result, the 4 driving torque provided by the ratchet wheel for driving the fastener is limited.
Figs. 14 through 16 of the drawings illustrate a conventional ratchet wheel 5 mounted in 6 a box end 9a (Fig. 17) of a ring spanner 9 (Fig. 17) and having an inner periphery 8 for driving 7 a fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 6.
8 Referring to Fig. 15, each arcuate concave tooth 6 is formed by means of feeding a cutter 7 9 along a radial direction. The resultant arcuate concave tooth 6 has a depth "d" and two sides that intersect at point "R". The line OR divides the angle /3 defined by the two sides of the 11 concave tooth 6 into two equal portions (usually 45° for each portion). As illustrated in Fig. 15, 12 each arcuate concave tooth 6 is machined to have a considerable depth "d"
that adversely 13 affects the structural strength of the ratchet wheel, as the remaining wall thickness "t" of the 14 ratchet wheel 5 is relatively small. As a result, the driving torque provided by the ratchet wheel for driving the fastener is limited. Such structure has been disclosed in U.S. Patent No.
16 5,533,427 to Chow issued on Jul. 9, 1996, which is incorporated herein for reference. A
17 further drawback of this conventional ratchet wheel is the low production rate for forming the 18 arcuate concave teeth by cutting.
19 The present invention is intended to provide an improved ratchet wheel that mitigates and/or obviates the above problems.
21 Summary of the Invention 22 It is a primary object of the present invention to provide an improved ratchet wheel has 23 asymmetric arcuate concave teeth for providing improved structural strength and improved 24 torque.
It is another object of the present invention to provide an improved ratchet wheel that 26 has non-arcuate concave teeth to allow higher production rate, as the non-arcuate concave 27 teeth can be formed by means of roll squeezing method, investment casting, or molding. The 1 non-arcuate concave teeth may be symmetric or asymmetric. The ratchet wheel with non-2 arcuate concave teeth may bear higher torque during ratcheting (i.e., tightening or loosening a 3 fastener).
4 The present invention also provides a ratcheting tool, e.g., a spanner, equipped with a ratchet wheel in accordance with the present invention. In an embodiment of the invention, the 6 spanner has a box end for receiving a ratcheting wheel with asymmetric arcuate concave teeth.
7 In another embodiment of the invention, the spanner has a box end for receiving a ratcheting 8 wheel with non-arcuate asymmetric concave teeth. In a further embodiment of the invention, 9 the spanner has a box end for receiving a ratcheting wheel with non-arcuate symmetric concave teeth.
11 Other objects, advantages, and novel features of the invention will become more 12 apparent from the following detailed description when taken in conjunction with the 13 accompanying drawings.
1 S Fig. 1 is a perspective view of a ratchet wheel with asymmetric arcuate concave teeth in 16 accordance with the present invention;
17 Fig. 2 is a side view of the ratchet wheel in accordance with the present invention;
18 Fig. 3 is a top view of the ratchet wheel in accordance with the present invention, 19 illustrating formation of asymmetric arcuate concave teeth in an outer periphery of the ratchet wheel;
21 Fig. 4 is a top view of a box end of a ring spanner equipped with the ratchet wheel in 22 accordance with the present invention;
23 Fig. 5 is a sectional view taken along line 5-5 in Fig. 4;
24 Fig. 6 is a top view, in an enlarged scale, of the ratchet wheel in accordance with the present invention, wherein position of symmetric concave teeth formed according to prior art 26 is illustrated to show difference therebetween;
1 Fig. 7a is a perspective view of a pawl for cooperating with the asymmetric arcuate 2 concave teeth of the ratchet wheel in accordance with the present invention;
3 Fig. 7b is a top view of the pawl in Fig. 7a;
4 Fig. 7c is a side view of the pawl in Fig. 7a;
Fig. 8a is a perspective view of a conventional pawl for cooperating with the arcuate 6 concave teeth of the ratchet wheel in Fig. 14;
7 Fig. 8b is a top view of the pawl in Fig. 8a;
8 Fig. 8c is a side view of the pawl in Fig. 8a;
9 Fig. 9 is an enlarged fragmentary view illustrating operation of the pawl and the asymmetric arcuate concave teeth of the ratchet wheel in accordance with the present 11 invention;
12 Fig. 10 is a schematic force diagram of the asymmetric arcuate concave tooth of the 13 ratchet wheel in accordance with the present invention;
14 Fig. 11 is a perspective view of a ratchet wheel according to prior art;
Fig. 12 is a top view of the ratchet wheel in Fig. 11;
16 Fig. 13 is a side view of the ratchet wheel in Fig. 11;
17 Fig. 14 is a perspective view of another ratchet wheel according to prior art;
18 Fig. 15 is a top view of the ratchet wheel in Fig. 14;
19 Fig. 16 is a side view of the ratchet wheel in Fig. 14;
Fig. 17 is a top view of a box end of a ring spanner equipped with the ratchet wheel in 21 Fig. 14;
22 Fig. 18 is an enlarged fragmentary view illustrating operation of the conventional pawl 23 and the symmetric arcuate concave teeth of the conventional ratchet wheel in the ring spanner 24 Fig. l7;
Fig. 19 is a schematic force diagram of the ratchet wheel in Fig. 14;
26 Fig. 20 is a sectional view taken along line 20-20 in Fig. 17;
1 Fig. 21 is a perspective view of a ratchet wheel with non-arcuate concave teeth in 2 accordance with the present invention;
3 Fig. 22 is a side view of the ratchet wheel in Fig. 21;
4 Fig. 23 is a top view of a box end of a ring spanner equipped with the ratchet wheel in Fig 21;
6 Fig. 24 is a sectional view taken along line 24-24 in Fig. 23;
7 Fig. 25 is a top view of the ratchet wheel in Fig. 21, wherein position of symmetric 8 concave teeth formed according to prior art is illustrated to show difference therebetween;
9 Fig. 26a is a perspective view of a pawl for cooperating with the non-arcuate concave teeth of the ratchet wheel in Fig. 23;
11 Fig. 26b is a top view of the pawl in Fig. 26a; and 12 Fig. 26c is a side view of the pawl in Fig. 26a.
13 Detailed Description of the Pr fprrp~l F bodimentc 14 Referring to Figs. 1 through 9 and initially to Figs. 1 through 3, a ratchet wheel 20 in accordance with the present invention generally includes an inner periphery 24 for driving a 16 fastener (not shown) and an outer periphery having a plurality of arcuate concave teeth 22.
17 Referring to Fig. 3, each arcuate concave tooth 22 is formed by means of feeding a cutter 26 18 along a direction transverse to a radial direction (see line OR). The resultant concave tooth 22 19 has a depth "d~" and two sides RA and RB that intersect at point "R". The line OR divides the angle 8 defined by the two sides RA and RB of the concave tooth 22 into two unequal 21 portions (e.g., 30° and 60°, 40° and 50°, etc).
Namely, every tooth 22 thus formed is 22 "asymmetric", or the two sides for each teeth 22 is not equal, which is the most important 23 feature of this embodiment of the present invention. As illustrated in Fig.
3, each concave 24 tooth 22 is machined to have a depth "dl" that will not adversely affect the structural strength of the ratchet wheel, as the remaining wall thickness "ti" of the ratchet wheel 20 is still 26 relatively large. As a result, the ratchet wheel 20 may bear a relatively large driving torque for 27 driving the fastener.
1 Difference in the depth of the tooth 22 of the ratchet wheel 20 of the present invention 2 and the depth of the tooth 6 of conventional ratchet wheel 5 (Fig. 14) is illustrated in Fig. 6.
3 Namely, the remaining wall thickness "t~" of the ratchet wheel 20 of the present invention is 4 greater than the remaining wall thickness "t" of conventional ratchet wheel 5 that has the same size as the ratchet wheel 20. Referring to Figs. 4 and 17, the narrowest wall thickness (ti =
3 Namely, the remaining wall thickness "t~" of the ratchet wheel 20 of the present invention is 4 greater than the remaining wall thickness "t" of conventional ratchet wheel 5 that has the same size as the ratchet wheel 20. Referring to Figs. 4 and 17, the narrowest wall thickness (ti =
6 1.01 mm in Fig. 4 for a ratchet wheel having an outer diameter of 25.76 mm) of the ratchet 7 wheel 20 of the present invention is almost twice as the narrowest wall thickness (t = 0.51 mm 8 in Fig. 17 for a ratchet wheel having an outer diameter of 25.76 mm) of conventional ratchet 9 wheel 5. Thus, the structural strength and the driving torque of the ratchet wheel of the present invention are both improved.
11 Referring to Fig. 4, the ratchet wheel 20 in accordance with the present invention is 12 rotatably mounted in a box end 38 of a ring spanner 40. A web area 39 between the box end 13 38 and a handle 42 of the ring spanner 40 includes a compartment 36 for receiving a pawl 30.
14 Figs. 7a through 7c illustrate the pawl 30. The pawl 30 includes a plurality of teeth 31 that are formed complimentary to the curvatures of the asymmetric arcuate concave teeth 22. An end 16 33 of the pawl 30 is attached to an end of an elastic member 32 the other end of which is 17 received in a cavity 34 defined in a wall 36a defining the compartment 36, best shown in Fig.
18 4. Fig. 17 illustrates a conventional arrangement of a ratchet type ring spanner 9 that has a box 19 end 9a for rotatably receiving the ratchet wheel 5. A web area (not labeled) of the ring spanner 9 includes a compartment 10 for receiving a pawl 11. Figs. 8a through 8c illustrate the pawl 11.
21 The pawl 11 includes a plurality of teeth 11 a that are formed complimentary to the curvatures 22 of the symmetric arcuate concave teeth 6. An end (not labeled) of the pawl 11 is attached to an 23 end of an elastic member 12 the other end of which is received in a cavity l0a defined in a 24 wall lOb defining the compartment 10, best shown in Fig. 17. Figs. 8a, 8b, 8c, and 17 are illustrated for comparison purpose. In addition, difference in the wall thickness of the ratchet 26 wheel 20 of the present invention and the wall thickness of conventional ratchet wheel 5 can 27 also be clearly seen in Fig. 6 and by means of comparing Fig. 5 with Fig.
20.
1 In use of the ring spanner equipped with the ratchet wheel 20 in accordance with the 2 present invention, referring to Fig. 9, the angle ~ between a force N normal to the operative 3 side P and the tangent T to the intersection I between the pawl 30 and the wall 36a defining 4 the compartment 36 is smaller than that in the prior art ratchet wheel (see Fig. 18). As a result, the pawl 30 in Fig. 9 is reliably pushed toward the wall 36a defining the compartment 36 and 6 thus provides a reliable engagement between the teeth 22 of the ratchet wheel 20 and the teeth 7 31 of the pawl 30. If the angle ~ reaches 90°, the pawl moves toward the central area of the 8 ratchet wheel and thus results in an undesired "sliding" effect, as there is no horizontal force 9 imparted to move the pawl toward the wall 36a of the compartment 36. Thus, the ratchet wheel 20 and the pawl 30 in accordance with the present invention provides an engagement 11 reliable than that between the conventional ratchet wheel 5 and the pawl 11 and thus less 12 likely to "slide". The spanner with the ratchet wheel/pawl combination in accordance with the 13 present invention can be used in a relatively small space and can be operated in a convenient 14 manner. More specifically, the spanner is allowed to rotate in a reverse direction without disengaging the box end from the fastener when the spanner is stopped by an obstacle during 16 ratcheting. And the spanner is then ready for next ratcheting movement.
This is very 17 convenient and timesaving.
18 Referring to Figs. 9 and 10, when the operative side P of the tooth 22 of the ratchet 19 wheel 20 in accordance with the present invention is subjected to a force F
during ratcheting, the area filled by the pawl 30 for bearing such force F is 2/1.732 h2.
Referring to Fig. 19, for a 21 conventional ratchet wheel 5, when either operative side P of the tooth 6 of the ratchet wheel 5 22 is subjected to a force F, the area filled by the pawl 11 for bearing such force F is h2 which is 23 smaller than that provided by the ratchet wheel/pawl combination in accordance with the 24 present invention. Namely, the ratchet wheel 20 with asymmetric arcuate concave teeth 22 provides a higher torque for ratcheting (i.e., tightening or loosening a fastener such as a nut or 26 bolt head).
1 Referring to Figs. 21 and 22, in a second embodiment of the ratchet wheel in accordance 2 with the present invention, the ratchet wheel (now designated by 50) includes an inner 3 periphery 54 for driving a fastener (not shown) and an outer periphery having a plurality of 4 non-arcuate concave teeth 52. The non-arcuate concave teeth 52 is formed by means of roll squeezing method, investment casting, or molding, which is quicker than formation by cutter.
6 Each non-arcuate concave tooth 52 may be trapezoidal, triangular, or any other shape that 7 results from formation other than cutting. The production cost for the ratchet wheel 50 with 8 non-arcuate concave teeth 52 in accordance with the present invention is largely reduced, as 9 the production time for the non-arcuate concave teeth 52 is relatively short. In addition, the non-arcuate concave teeth 52 may be symmetric or asymmetric. When the ratchet wheel 50 11 has non-arcuate symmetric concave teeth 52, the resultant structure provides a driving torque 12 approximately the same as that provided by the conventional ratchet wheel 5 with symmetric 13 arcuate concave teeth 6. When the ratchet wheel 50 has non-arcuate asymmetric concave teeth 14 52 configured similar to teeth 22, the resultant structure provides a higher driving torque than I 5 that provided by the conventional ratchet wheel S with symmetric arcuate concave teeth 6.
16 Referring to Fig. 23, the ratchet wheel 50 in accordance with the present invention may 17 be rotatably mounted in a box end 38 Of a ring spanner 40. A web area 39 of the ring spanner 18 40 includes a compartment 36 for receiving a pawl 60. Figs. 26a through 26c illustrate the 19 pawl 60. The pawl 60 includes a plurality of teeth 61 that are formed complimentary to the curvatures of the non-arcuate concave teeth 52. An end 62 of the pawl 60 is attached to an end 21 of an elastic member 32 the other end of which is received in a cavity 34 defined in a wall 36a 22 defining the compartment 36, best shown in Fig. 23. A detail comparison between the 23 conventional pawl 11 illustrated in Figs. 8a through 8c, the pawl 30 of the first embodiment of 24 the present invention illustrated in Figs. 7a through 7c, and the pawl 60 of this embodiment illustrated in Figs. 26a through 26c would be appreciated. In addition, difference in the wall 26 thickness of the ratchet wheel SO of the present invention and the wall thickness of 1 conventional ratchet wheel 5 can also be clearly seen in Fig. 25 and by means of comparing 2 Fig. 24 with Fig. 20.
3 According to the above description, it is appreciated that the ratchet wheel with 4 asymmetric arcuate concave teeth in accordance with the present invention provides a higher torque for operation and has improved structural strength as having a thicker wall in the 6 ratchet wheel. The engagement between the ratchet wheel with asymmetric arcuate concave 7 teeth and the pawl with asymmetric arcuate concave teeth is more reliable.
The ratchet wheel 8 with non-arcuate concave teeth in accordance with the present invention reduces the 9 production cost for the ratchet wheel. The ratchet wheel with non-arcuate concave teeth also provides a higher torque for operation when the non-arcuate concave teeth is asymmetric. A
11 spanner with the ratchet wheel/pawl combination in accordance with the present invention can 12 be used in a relatively small space. Nevertheless, the ratchet wheel/pawl combination in 13 accordance with the present invention is not limited to be used in the box end of a ring spanner.
14 Namely, the ratchet wheel/pawl combination may be used in other ratcheting tools such as ratchet wrenches.
16 Although the invention has been explained in relation to its preferred embodiment, it is 17 to be understood that many other possible modifications and variations can be made without 18 departing from the spirit and scope of the invention as hereinafter claimed.
11 Referring to Fig. 4, the ratchet wheel 20 in accordance with the present invention is 12 rotatably mounted in a box end 38 of a ring spanner 40. A web area 39 between the box end 13 38 and a handle 42 of the ring spanner 40 includes a compartment 36 for receiving a pawl 30.
14 Figs. 7a through 7c illustrate the pawl 30. The pawl 30 includes a plurality of teeth 31 that are formed complimentary to the curvatures of the asymmetric arcuate concave teeth 22. An end 16 33 of the pawl 30 is attached to an end of an elastic member 32 the other end of which is 17 received in a cavity 34 defined in a wall 36a defining the compartment 36, best shown in Fig.
18 4. Fig. 17 illustrates a conventional arrangement of a ratchet type ring spanner 9 that has a box 19 end 9a for rotatably receiving the ratchet wheel 5. A web area (not labeled) of the ring spanner 9 includes a compartment 10 for receiving a pawl 11. Figs. 8a through 8c illustrate the pawl 11.
21 The pawl 11 includes a plurality of teeth 11 a that are formed complimentary to the curvatures 22 of the symmetric arcuate concave teeth 6. An end (not labeled) of the pawl 11 is attached to an 23 end of an elastic member 12 the other end of which is received in a cavity l0a defined in a 24 wall lOb defining the compartment 10, best shown in Fig. 17. Figs. 8a, 8b, 8c, and 17 are illustrated for comparison purpose. In addition, difference in the wall thickness of the ratchet 26 wheel 20 of the present invention and the wall thickness of conventional ratchet wheel 5 can 27 also be clearly seen in Fig. 6 and by means of comparing Fig. 5 with Fig.
20.
1 In use of the ring spanner equipped with the ratchet wheel 20 in accordance with the 2 present invention, referring to Fig. 9, the angle ~ between a force N normal to the operative 3 side P and the tangent T to the intersection I between the pawl 30 and the wall 36a defining 4 the compartment 36 is smaller than that in the prior art ratchet wheel (see Fig. 18). As a result, the pawl 30 in Fig. 9 is reliably pushed toward the wall 36a defining the compartment 36 and 6 thus provides a reliable engagement between the teeth 22 of the ratchet wheel 20 and the teeth 7 31 of the pawl 30. If the angle ~ reaches 90°, the pawl moves toward the central area of the 8 ratchet wheel and thus results in an undesired "sliding" effect, as there is no horizontal force 9 imparted to move the pawl toward the wall 36a of the compartment 36. Thus, the ratchet wheel 20 and the pawl 30 in accordance with the present invention provides an engagement 11 reliable than that between the conventional ratchet wheel 5 and the pawl 11 and thus less 12 likely to "slide". The spanner with the ratchet wheel/pawl combination in accordance with the 13 present invention can be used in a relatively small space and can be operated in a convenient 14 manner. More specifically, the spanner is allowed to rotate in a reverse direction without disengaging the box end from the fastener when the spanner is stopped by an obstacle during 16 ratcheting. And the spanner is then ready for next ratcheting movement.
This is very 17 convenient and timesaving.
18 Referring to Figs. 9 and 10, when the operative side P of the tooth 22 of the ratchet 19 wheel 20 in accordance with the present invention is subjected to a force F
during ratcheting, the area filled by the pawl 30 for bearing such force F is 2/1.732 h2.
Referring to Fig. 19, for a 21 conventional ratchet wheel 5, when either operative side P of the tooth 6 of the ratchet wheel 5 22 is subjected to a force F, the area filled by the pawl 11 for bearing such force F is h2 which is 23 smaller than that provided by the ratchet wheel/pawl combination in accordance with the 24 present invention. Namely, the ratchet wheel 20 with asymmetric arcuate concave teeth 22 provides a higher torque for ratcheting (i.e., tightening or loosening a fastener such as a nut or 26 bolt head).
1 Referring to Figs. 21 and 22, in a second embodiment of the ratchet wheel in accordance 2 with the present invention, the ratchet wheel (now designated by 50) includes an inner 3 periphery 54 for driving a fastener (not shown) and an outer periphery having a plurality of 4 non-arcuate concave teeth 52. The non-arcuate concave teeth 52 is formed by means of roll squeezing method, investment casting, or molding, which is quicker than formation by cutter.
6 Each non-arcuate concave tooth 52 may be trapezoidal, triangular, or any other shape that 7 results from formation other than cutting. The production cost for the ratchet wheel 50 with 8 non-arcuate concave teeth 52 in accordance with the present invention is largely reduced, as 9 the production time for the non-arcuate concave teeth 52 is relatively short. In addition, the non-arcuate concave teeth 52 may be symmetric or asymmetric. When the ratchet wheel 50 11 has non-arcuate symmetric concave teeth 52, the resultant structure provides a driving torque 12 approximately the same as that provided by the conventional ratchet wheel 5 with symmetric 13 arcuate concave teeth 6. When the ratchet wheel 50 has non-arcuate asymmetric concave teeth 14 52 configured similar to teeth 22, the resultant structure provides a higher driving torque than I 5 that provided by the conventional ratchet wheel S with symmetric arcuate concave teeth 6.
16 Referring to Fig. 23, the ratchet wheel 50 in accordance with the present invention may 17 be rotatably mounted in a box end 38 Of a ring spanner 40. A web area 39 of the ring spanner 18 40 includes a compartment 36 for receiving a pawl 60. Figs. 26a through 26c illustrate the 19 pawl 60. The pawl 60 includes a plurality of teeth 61 that are formed complimentary to the curvatures of the non-arcuate concave teeth 52. An end 62 of the pawl 60 is attached to an end 21 of an elastic member 32 the other end of which is received in a cavity 34 defined in a wall 36a 22 defining the compartment 36, best shown in Fig. 23. A detail comparison between the 23 conventional pawl 11 illustrated in Figs. 8a through 8c, the pawl 30 of the first embodiment of 24 the present invention illustrated in Figs. 7a through 7c, and the pawl 60 of this embodiment illustrated in Figs. 26a through 26c would be appreciated. In addition, difference in the wall 26 thickness of the ratchet wheel SO of the present invention and the wall thickness of 1 conventional ratchet wheel 5 can also be clearly seen in Fig. 25 and by means of comparing 2 Fig. 24 with Fig. 20.
3 According to the above description, it is appreciated that the ratchet wheel with 4 asymmetric arcuate concave teeth in accordance with the present invention provides a higher torque for operation and has improved structural strength as having a thicker wall in the 6 ratchet wheel. The engagement between the ratchet wheel with asymmetric arcuate concave 7 teeth and the pawl with asymmetric arcuate concave teeth is more reliable.
The ratchet wheel 8 with non-arcuate concave teeth in accordance with the present invention reduces the 9 production cost for the ratchet wheel. The ratchet wheel with non-arcuate concave teeth also provides a higher torque for operation when the non-arcuate concave teeth is asymmetric. A
11 spanner with the ratchet wheel/pawl combination in accordance with the present invention can 12 be used in a relatively small space. Nevertheless, the ratchet wheel/pawl combination in 13 accordance with the present invention is not limited to be used in the box end of a ring spanner.
14 Namely, the ratchet wheel/pawl combination may be used in other ratcheting tools such as ratchet wrenches.
16 Although the invention has been explained in relation to its preferred embodiment, it is 17 to be understood that many other possible modifications and variations can be made without 18 departing from the spirit and scope of the invention as hereinafter claimed.
Claims (26)
1. A ratchet wheel comprising an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.
2. The ratchet wheel as claimed in claim 1, further comprising an inner periphery for driving a fastener.
3. A ratchet wheel comprising an outer periphery, the outer periphery including a plurality of asymmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.
4. The ratchet wheel as claimed in claim 3, further comprising an inner periphery for driving a fastener.
5. The ratchet wheel as claimed in claim 3, wherein said asymmetric non-arcuate concave teeth are not formed by cutting.
6. The ratchet wheel as claimed in claim 3, wherein said asymmetric non-arcuate concave teeth are formed by roll squeezing.
7. The ratchet wheel as claimed in claim 3, wherein said asymmetric non-arcuate concave teeth are formed by investment casting.
8. The ratchet wheel as claimed in claim 3, wherein each said asymmetric non-arcuate concave tooth is trapezoidal.
9. The ratchet wheel as claimed in claim 3, wherein each said asymmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
10. A ratchet wheel comprising an outer periphery, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two equal portions.
11. The ratchet wheel as claimed in claim 10, further comprising an inner periphery for driving a fastener.
12. The ratchet wheel as claimed in claim 10, wherein said symmetric non-arcuate concave teeth are not formed by cutting.
13. The ratchet wheel as claimed in claim 10, wherein said symmetric non-arcuate concave teeth are formed by roll squeezing.
14. The ratchet wheel as claimed in claim 10, wherein said symmetric non-arcuate concave teeth are formed by investment casting.
15. The ratchet wheel as claimed in claim 10, wherein each said symmetric non-arcuate concave tooth is trapezoidal.
16. The ratchet wheel as claimed in claim 10, wherein each said symmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
17. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel rotatably mounted in the hole of the end, the ratchet wheel comprising an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the asymmetric arcuate concave teeth of the ratchet wheel; and means for biasing the pawl toward a wall defining the compartment.
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel rotatably mounted in the hole of the end, the ratchet wheel comprising an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the asymmetric arcuate concave teeth of the ratchet wheel; and means for biasing the pawl toward a wall defining the compartment.
18. The ratcheting tool as claimed in claim 17, further comprising an inner periphery for driving a fastener.
19. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel comprising an outer periphery, the outer periphery including a plurality of asymmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the asymmetric non-arcuate concave teeth of the ratchet wheel; and means for biasing the pawl toward a wall defining the compartment.
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel comprising an outer periphery, the outer periphery including a plurality of asymmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the asymmetric non-arcuate concave teeth of the ratchet wheel; and means for biasing the pawl toward a wall defining the compartment.
20. The ratcheting tool as claimed in claim 19, wherein the ratchet wheel further comprises an inner periphery for driving a fastener.
21. The ratcheting tool as claimed in claim 19, wherein said asymmetric non-arcuate concave teeth are formed by roll squeezing.
22. The ratcheting tool as claimed in claim 19, wherein each said asymmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
23. A ratcheting tool comprising:
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel comprising an outer periphery, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two equal portions;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the symmetric non-arcuate concave teeth of the ratchet wheel; and means for biasing the pawl toward a wall defining the compartment.
a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
a ratchet wheel comprising an outer periphery, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two equal portions;
a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the symmetric non-arcuate concave teeth of the ratchet wheel; and means for biasing the pawl toward a wall defining the compartment.
24. The ratcheting tool as claimed in claim 23, wherein the ratchet wheel further comprises an inner periphery for driving a fastener.
25. The ratcheting tool as claimed in claim 23, wherein said symmetric non-arcuate concave teeth are formed by roll squeezing.
26. The ratcheting tool as claimed in claim 23, wherein each said symmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/365,738 | 1999-08-03 | ||
US09/365,738 US6148695A (en) | 1999-08-03 | 1999-08-03 | Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2313397A1 true CA2313397A1 (en) | 2001-02-03 |
Family
ID=23440143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002313397A Abandoned CA2313397A1 (en) | 1999-08-03 | 2000-07-05 | Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel |
Country Status (3)
Country | Link |
---|---|
US (3) | US6148695A (en) |
EP (1) | EP1074348A3 (en) |
CA (1) | CA2313397A1 (en) |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6148695A (en) | 1999-08-03 | 2000-11-21 | Hu; Bobby | Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel |
US6431031B1 (en) | 1999-12-16 | 2002-08-13 | Bobby Hu | Reversible ratcheting tool with a smaller head |
US6568299B2 (en) | 1999-12-16 | 2003-05-27 | Bobby Hu | Reversible ratcheting tool with a smaller head |
TW418748U (en) | 2000-01-11 | 2001-01-11 | Hu Hou Fei | Ratchet wrench |
TW447369U (en) * | 2000-06-26 | 2001-07-21 | Jang Jr Ming | Improved ratchet structure for ratchet wrench |
TW428513U (en) | 2000-07-21 | 2001-04-01 | Hu Hou Fei | Locating device of a direction switch and ratchet tools using the same |
TW437521U (en) | 2000-08-22 | 2001-05-28 | Hu Hou Fei | Ratchet driven tool |
TW444633U (en) | 2000-09-01 | 2001-07-01 | Hu Hou Fei | Ratchet tool |
DE20115710U1 (en) * | 2000-09-27 | 2001-12-13 | Chang Chih Ming | Ratchet wrench with high torque |
US6745647B2 (en) * | 2000-11-29 | 2004-06-08 | Mei-Chen Wang | Wrench having a universal-joint ratchet wheel |
US6516930B2 (en) * | 2000-12-29 | 2003-02-11 | Ching Chen | Ratchet mechanism for tools |
US6305247B1 (en) * | 2001-01-09 | 2001-10-23 | Ching Chen | Ratchet wrench structure |
TWM227556U (en) * | 2001-01-11 | 2010-02-11 | Danaher Tool Ltd | Supplement of improved structure of high-torque compound reversible ratchet wrench |
TW489701U (en) | 2001-02-19 | 2002-06-01 | Hou-Fei Hu | A ratchet driven wrench capable of easily manufacturing and fabricating |
US6807882B2 (en) | 2001-05-07 | 2004-10-26 | Bobby Hu | Wrench with a simplified structure |
US6722234B2 (en) | 2001-05-14 | 2004-04-20 | Bobby Hu | Easy-to-operate and easy-to-assemble ratcheting-type wrench |
TW483377U (en) | 2001-07-13 | 2002-04-11 | Hou-Fei Hu | Micro small torque wrench with constant torque value |
TW483365U (en) | 2001-07-13 | 2002-04-11 | Hou-Fei Hu | High torque wrench |
US6647832B2 (en) | 2001-07-27 | 2003-11-18 | Bobby Hu | Wrench having two rigid supporting areas for a pawl |
US6539825B1 (en) | 2001-09-20 | 2003-04-01 | Yen-Wen Lin | Single direction ratcheting wrench with stuck prevention and ratcheting direction indication |
US6450066B1 (en) * | 2001-10-19 | 2002-09-17 | Bobby Hu | Head of a wrench handle |
US6520051B1 (en) | 2001-12-27 | 2003-02-18 | Bobby Hu | Head of a wrench handle |
TW506308U (en) | 2002-02-08 | 2002-10-11 | Hou-Fei Hu | Improved structure for ratchet wrench |
EP1413399B1 (en) * | 2002-09-26 | 2011-11-09 | Terence Chen | Ratchet wrench |
US6918323B2 (en) * | 2002-11-01 | 2005-07-19 | Easco Hand Tools Inc. | Reversible ratcheting tool with improved pawl |
EP1426144B1 (en) * | 2002-12-03 | 2006-12-06 | Terence Chen | One-way wrench |
TWI262118B (en) * | 2003-01-28 | 2006-09-21 | Hou-Fei Hu | Structure improvement of head-rotatable wrench |
USD498778S1 (en) | 2004-04-22 | 2004-11-23 | Bobby Hu | Gear wheel |
US7044029B1 (en) | 2004-06-28 | 2006-05-16 | Snap-On Incorporated | Ratcheting tool with pawl spring retainer |
US7263919B2 (en) * | 2004-09-10 | 2007-09-04 | Easco Handtools, Inc. | Ratcheting tool with vertically curved tooth arrangement |
CN201399751Y (en) * | 2009-05-14 | 2010-02-10 | 杭州阳工五金有限公司 | Ratchet wheel double-purpose spanner |
US8459151B2 (en) | 2010-05-28 | 2013-06-11 | Meridian International Co., Ltd. | Ratcheting socket wrench and sockets |
USD665237S1 (en) * | 2012-01-23 | 2012-08-14 | Hung-Yin Wei | Swingable ratchet wheel |
TWI404600B (en) * | 2012-04-05 | 2013-08-11 | Yueh Ying Yang | Rachet wrench |
TW201343335A (en) * | 2012-04-20 | 2013-11-01 | Cheng-Pu Yang | Ratchet structure |
TW201345663A (en) * | 2012-05-04 | 2013-11-16 | Cheng-Pu Yang | Ratchet manufacturing method |
TWM476030U (en) * | 2013-09-13 | 2014-04-11 | Jia-You Chen | Improved structure of penetrating type ratchet wrench |
CN104708569A (en) * | 2015-03-17 | 2015-06-17 | 周少岐 | Insulating ratchet wrench |
US9868189B2 (en) * | 2015-11-01 | 2018-01-16 | Li-Ching Lin | Ratchet wrench with restriction member for restricting movement of pawl |
WO2017153629A1 (en) * | 2016-03-11 | 2017-09-14 | Jukka Jokinen | Tightening device for tightening pipe connection |
US11298807B2 (en) | 2017-10-31 | 2022-04-12 | Hubbell Incorporated | Ratcheting box torque wrench |
USD953829S1 (en) * | 2020-02-25 | 2022-06-07 | Kabo Tool Company | Driver of a wrench |
Family Cites Families (244)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1194471A (en) | 1916-08-15 | Combihatiob | ||
US2735324A (en) | 1956-02-21 | Friction action ratchet wrench | ||
DE373436C (en) | 1923-04-12 | Johann Behrens | Socket wrench for rail bolts | |
US15482A (en) | 1856-08-05 | Wrench | ||
US726012A (en) | 1903-01-20 | 1903-04-21 | Howard Emmet Andrew | Nut-wrench. |
US810599A (en) * | 1905-04-10 | 1906-01-23 | Eugene K Ansorge | Wrench. |
US878657A (en) | 1906-01-02 | 1908-02-11 | Arthur Munch | Ratchet-wrench. |
US818761A (en) | 1906-01-20 | 1906-04-24 | Frederick A Hanes | Ratchet-wrench. |
US841686A (en) | 1906-11-20 | 1907-01-22 | John N Hatfield | Wrench. |
US893097A (en) | 1907-09-27 | 1908-07-14 | Joseph M Reams | Reversible ratchet-wrench. |
US915446A (en) | 1908-09-23 | 1909-03-16 | Joseph M Kearnes | Wrench. |
US1090578A (en) | 1911-06-10 | 1914-03-17 | Joseph B Smythe | Ratchet mechanism. |
US1033358A (en) | 1911-12-09 | 1912-07-23 | John L Turner | Wrench. |
US1078059A (en) | 1913-10-01 | 1913-11-11 | Frank Mossberg Company | Wrench. |
US1261092A (en) | 1914-06-18 | 1918-04-02 | Fred R Allen | Wrench. |
US1157427A (en) * | 1915-07-29 | 1915-10-19 | Michael Vern Seivert | Wrench. |
FR498276A (en) | 1919-04-12 | 1920-01-07 | Costantino Roccati | Key for mechanical parts |
US1426127A (en) | 1920-04-23 | 1922-08-15 | Frank Mossberg Company | Ratchet wrench |
US1382492A (en) | 1920-12-10 | 1921-06-21 | Evans Lafayette | Wrench |
US1601767A (en) | 1923-07-20 | 1926-10-05 | Otto R Peterson | Ratchet wrench |
US1614039A (en) * | 1924-02-01 | 1927-01-11 | Husky Wrench Company | Wrench |
US1639078A (en) | 1925-03-14 | 1927-08-16 | John E Coe | Ratchet wrench |
US1680515A (en) | 1926-12-21 | 1928-08-14 | Buda Co | Ratchet mechanism for lifting jacks |
US1772524A (en) | 1927-04-08 | 1930-08-12 | Snap On Wrench Company | Ratchet wrench |
US1733355A (en) * | 1927-07-25 | 1929-10-29 | Calvin E Morse | Wrench |
US1957462A (en) | 1933-01-25 | 1934-05-08 | Williams J H & Co | Ratchet wrench |
US2193984A (en) | 1937-04-16 | 1940-03-19 | Armstrong Bros Tool Co | Reversible ratchet wrench |
US2201705A (en) | 1938-07-19 | 1940-05-21 | Wright Tool And Forge Company | Ratchet wrench |
US2201827A (en) | 1939-04-17 | 1940-05-21 | Otto P Froeschl | Ratchet mechanism |
US2317461A (en) * | 1940-03-22 | 1943-04-27 | Lucian C Jackson | Wrench |
DE921198C (en) * | 1944-01-04 | 1954-12-09 | Friedrich Wilhelm Thienes | Nut wrench with free wheel ratchet |
US2542241A (en) | 1946-10-23 | 1951-02-20 | New Britain Machine Co | Ratchet mechanism |
US2612807A (en) | 1947-11-17 | 1952-10-07 | Ralph R Hunt | Ratchet wrench spinner |
US2657604A (en) | 1952-09-11 | 1953-11-03 | Sherman Klove Co | Ratchet wrench |
US2701977A (en) | 1953-05-07 | 1955-02-15 | Wright Tool And Forge Company | Reversible ratchet wrench |
US2800821A (en) | 1953-10-01 | 1957-07-30 | New Britain Machine Co | Angularly adjustable, reversible ratchet wrench |
US2769360A (en) | 1954-09-10 | 1956-11-06 | Cottrell Wayne Woodford | Angular wrench head having upwardly opening socket |
US2764048A (en) * | 1955-02-07 | 1956-09-25 | Leslie V Thompson | Ratchet wrench |
US2803980A (en) | 1955-12-27 | 1957-08-27 | Irwin R Vogel | Reversible ratchet wrench |
US2978081A (en) | 1956-08-13 | 1961-04-04 | Bahco Ab | Devices in ratchet wrenches |
US2957377A (en) | 1957-09-13 | 1960-10-25 | Terence G Hare | Reversible ratchet type wrench |
US2891434A (en) | 1958-04-21 | 1959-06-23 | Lozensky Charles Andrew | Ratchet wrench |
DE1810811U (en) | 1958-11-14 | 1960-05-05 | Emka Metallwarenfabrik A G | PLASTIC WATER TANK FOR HOT WATER DEVICES. |
US3044591A (en) | 1959-08-31 | 1962-07-17 | Luther E Kilness | Ratchet mechanism |
US3019682A (en) | 1960-04-08 | 1962-02-06 | Terence G Hare | Reversible ratchet type wrench |
US3233481A (en) | 1963-10-25 | 1966-02-08 | Kelsey Hayes Co | Ratchet wrench |
US3250157A (en) | 1963-11-06 | 1966-05-10 | Snap On Tools Corp | Magnetic ratchet mechanism for wrenches and the like |
US3265171A (en) | 1964-06-22 | 1966-08-09 | Luther E Kilness | One way reversible clutch for wrench |
US3269496A (en) | 1964-06-22 | 1966-08-30 | Luther E Kilness | Reversible one way clutch for wrench |
US3337014A (en) | 1965-10-20 | 1967-08-22 | John A Sandrick | Ratchet wrench |
US3342229A (en) | 1965-10-21 | 1967-09-19 | James Igor | Ratchet handle screwdriver |
US3393587A (en) | 1966-12-15 | 1968-07-23 | Wright Tool And Forge Company | Ratchet wrenches |
US3393780A (en) | 1967-01-26 | 1968-07-23 | Luther E. Kilness | Reversible ratchet |
US3436992A (en) | 1967-03-10 | 1969-04-08 | Pendleton Tool Ind Inc | Reversible ratchet wrench with floating pawls |
US3508455A (en) | 1968-02-16 | 1970-04-28 | John F Miller | Combination tool |
DE1901338B2 (en) | 1969-01-11 | 1972-09-28 | Stanley Werzeuggesellschaft mbH, 5600 Wuppertal-Barmen | DIRECTIONAL RATCHET |
US3598001A (en) | 1969-02-14 | 1971-08-10 | Lowell Corp | Reversible ratchet handle for socket wrench |
US3577816A (en) * | 1969-04-10 | 1971-05-04 | Jerry Alexander | Ratchet wrench |
US3575069A (en) | 1969-07-29 | 1971-04-13 | Kit C White | Ratchet and speed wrench combination |
US3713356A (en) | 1971-01-18 | 1973-01-30 | Snap On Tools Corp | Socket release mechanism for wrenches and the like |
US3691876A (en) | 1971-02-08 | 1972-09-19 | Leon Cassidy Jr | Ratchet spinner wrench |
US3908487A (en) | 1971-09-10 | 1975-09-30 | Stanley Works | Rotary hand tool |
US3742788A (en) * | 1972-07-20 | 1973-07-03 | Parker Mfg Co | Ratchet wrench |
US3783703A (en) | 1972-11-17 | 1974-01-08 | Jo Line Tools | Ratchet mechanism |
US3838614A (en) * | 1972-12-12 | 1974-10-01 | Donnell W O | Reciprocating engine barring tool |
US3970155A (en) | 1974-01-14 | 1976-07-20 | Jo-Line Tools, Inc. | Electronic torque wrench |
US3866492A (en) | 1974-03-06 | 1975-02-18 | Jo Line Tools | Torque multiplier |
US4053037A (en) | 1976-06-10 | 1977-10-11 | Jo-Line Tools, Inc. | Reversing ratchet |
US4111077A (en) | 1977-02-02 | 1978-09-05 | Lowell Corporation | Ratchet wrench |
US4070932A (en) | 1977-03-01 | 1978-01-31 | Jeannotte Richard W | Extensible handle for a tool headpiece |
GB1559093A (en) | 1977-04-07 | 1980-01-16 | Gordon Tools Ltd | Ratchet drivers |
US4128025A (en) | 1977-08-08 | 1978-12-05 | Main Harvey M | Bolt starting device |
US4147076A (en) | 1977-10-31 | 1979-04-03 | The Wright Tool And Forge Company | Reversing-ratchet socket wrench |
US4257507A (en) | 1978-08-15 | 1981-03-24 | Jo-Line Tools, Inc. | Torque wrench with pawl guide |
US4277989A (en) | 1979-05-01 | 1981-07-14 | Tracy Kurt L | Ratchet wrench handle |
DE2918825A1 (en) | 1979-05-10 | 1980-11-20 | Foell Remswerk | RATCHET LEVER |
US4274311A (en) | 1979-07-23 | 1981-06-23 | Emil Ebert | Ratchet wrench handle |
US4277990A (en) | 1979-11-14 | 1981-07-14 | Duro Metal Products Company | Ratchet wrench |
US4328720A (en) | 1980-03-17 | 1982-05-11 | Shiel Walter P | Socket wrench and set |
US4308769A (en) | 1980-06-02 | 1982-01-05 | Bertha Rantanen | Reversing ratcheting wrench |
US4336728A (en) | 1980-10-08 | 1982-06-29 | Deibert Raymond L | Push-button reversible ratchet and pawl socket wrench handle |
US4515044A (en) * | 1980-10-23 | 1985-05-07 | Harstad Larry V | Quick change ratchet wrench |
US4406186A (en) | 1981-05-29 | 1983-09-27 | Gummow Stephen A | Dual action ratchet wrench |
US4420995A (en) | 1981-06-05 | 1983-12-20 | Roberts Peter M | Quick-release and positive locking mechanism for use on socket wrenches and on power and impact tools |
US4488460A (en) | 1982-07-28 | 1984-12-18 | Easco Corporation | Ergonomic handle for hand tool |
US4520697A (en) | 1982-09-29 | 1985-06-04 | Moetteli John B | Ratchet wrench |
US4485700A (en) | 1983-01-26 | 1984-12-04 | Colvin David S | Reversible ratchet wrench |
US4631988A (en) | 1983-01-26 | 1986-12-30 | Colvin David S | Reversible ratchet wrench including detent mechanism |
GB2135226A (en) | 1983-02-16 | 1984-08-30 | Britool Ltd | Ratchet wrench |
US5000066A (en) | 1983-07-05 | 1991-03-19 | Gentiluomo Paul A | Ratchet wrench |
DE3407126A1 (en) | 1984-02-28 | 1985-08-29 | Enerpac GmbH, 4300 Essen | POWER SCREWDRIVER WITH A TENSION WHEEL WITH A FINE-STAGE TOOTHING |
US4512218A (en) | 1984-03-19 | 1985-04-23 | Chow Kirk K | Control bar for ratchet wrench |
ATE31497T1 (en) | 1985-01-07 | 1988-01-15 | Wille Gmbh & Co | RATCHET KEY. |
US4631990A (en) * | 1985-08-02 | 1986-12-30 | Hughes Matthew E | Open-ended ratchet wrench |
US4662251A (en) | 1985-10-08 | 1987-05-05 | Kohal Lester L | Orthogonal adjustable socket wrench |
US4777852A (en) | 1986-10-02 | 1988-10-18 | Snap-On Tools Corporation | Ratcheting screwdriver |
US4807500A (en) | 1986-11-14 | 1989-02-28 | Main Harvey M | Reversing ratchet mechanism for tools |
US4722253A (en) | 1987-01-21 | 1988-02-02 | Jessie Chow | Reversible ratchet wrench with one-hand accessible switch |
US4762033A (en) | 1987-02-24 | 1988-08-09 | National Hand Tool Corporation | Ratchet wrench with manual disassembly capability |
US4722252A (en) | 1987-03-02 | 1988-02-02 | Fulcher William A | Power driven wrench |
US5038452A (en) | 1988-01-28 | 1991-08-13 | Latshaw Enterprises, Inc. | Method of assembling an improved ratcheting tool driver |
US4869138A (en) | 1988-02-08 | 1989-09-26 | Farris Jim L | New and improved ratchet tool with rotatable rotor lock and rigid shifter finger |
US4796492A (en) | 1988-05-20 | 1989-01-10 | Liou Mou Tang | Clutch type socket wrench |
US4903554A (en) | 1988-06-02 | 1990-02-27 | Colvin David S | Reversible ratchet wrench with thin head construction |
GB2223971A (en) | 1988-10-19 | 1990-04-25 | Jessie Chow | Ratchet wrench |
US4924737A (en) | 1989-03-20 | 1990-05-15 | Gummow Tool Company | Positive drive ratchet |
US4934220A (en) | 1989-04-03 | 1990-06-19 | Snap-On Tools Corporation | Sealed reversible ratchet wrench |
EP0437007A1 (en) | 1989-07-20 | 1991-07-17 | Chiro Tools Mfg., Corp. | Improved wrench |
US5076121A (en) | 1989-07-28 | 1991-12-31 | Gregory Fosella | Adjustable ratchet wrench |
US5305670A (en) | 1989-07-28 | 1994-04-26 | Gregory Fossella | Adjustable wrench |
US5012705A (en) | 1990-03-16 | 1991-05-07 | National Hand Tool Corporation | Ratchet wrench with manually removable core |
US4991468A (en) * | 1990-08-10 | 1991-02-12 | Lee Clark J | Barrel type sockets |
US5231903A (en) | 1990-12-20 | 1993-08-03 | Hi-Shear Corporation | Reversible ratchet wrench |
US5095781A (en) | 1991-01-18 | 1992-03-17 | Stanley-Parker, Inc. | Ratchet spinner |
SE502116C2 (en) | 1991-03-27 | 1995-08-21 | Bahco Ab Sandvik | Ratchet wrench whose direction of rotation is adjustable by a ratchet |
US5178047A (en) | 1991-08-08 | 1993-01-12 | Easco Hand Tools, Inc. | Reversible ratchet wrench |
US5233891A (en) | 1991-09-06 | 1993-08-10 | Easco Hand Tools, Inc. | Detent means |
US5199330A (en) | 1991-10-01 | 1993-04-06 | Easco Hand Tools, Inc. | Reversing ratchet wrench |
US5157994A (en) | 1991-12-13 | 1992-10-27 | Snap-On Tools Corporation | Ratchet wrench with lost motion reversing mechanism |
US5626062A (en) | 1992-01-16 | 1997-05-06 | Colvin; David S. | Socket and ratchet wrench |
US5144869A (en) | 1992-03-09 | 1992-09-08 | Jessie Chow | Control device for ratchet wrenches |
US5467672A (en) | 1992-04-20 | 1995-11-21 | Ashby; Earl T. | Open end ratchet wrench |
US5199335A (en) | 1992-05-11 | 1993-04-06 | Easco Hand Tools, Inc. | Flex-head tool with locking feature |
US5271300A (en) | 1992-07-14 | 1993-12-21 | Snap-On Tools Corporation | Composite hand tool |
US5404773A (en) | 1992-08-10 | 1995-04-11 | Norville; Burl O. | Cam-action ratchet-type wrench |
US5509333A (en) | 1993-01-28 | 1996-04-23 | Rion; John D. | Low profile ratchet adapter |
US5392672A (en) | 1993-03-09 | 1995-02-28 | Larry R. Larson | Ratchet wrench |
US5347892A (en) | 1993-03-11 | 1994-09-20 | Moetteli John B | Socket retainer for thin-wall drive member |
US5295422A (en) | 1993-04-23 | 1994-03-22 | Jessie Chow | Wrench having a greater driving strength |
US5584220A (en) | 1994-03-01 | 1996-12-17 | Darrah; Scott A. | Angle attachment tool |
US5425291A (en) | 1994-04-05 | 1995-06-20 | Chang; Sheue Z. | Unidirectional driving head assembly |
US5499560A (en) | 1994-05-20 | 1996-03-19 | Aeschliman; William M. | Universal open ended socket wrench |
US5495783A (en) | 1994-07-08 | 1996-03-05 | Snap-On Incorporated | Reversible ratchet wrench with direction indicia |
WO1996002361A1 (en) | 1994-07-14 | 1996-02-01 | Main Corporation | Ratchet wrench |
US5582081A (en) | 1994-08-23 | 1996-12-10 | Lin; Ching-Chou | Reversible screwdriver |
US5477757A (en) | 1994-09-06 | 1995-12-26 | Maresh; Joseph D. | Ergonomic ratchet wrench |
US5595095A (en) | 1994-10-13 | 1997-01-21 | Hillinger; George | Ratcheting socket wrench with intermeshing gears |
US5522288A (en) | 1994-12-09 | 1996-06-04 | Snap-On Incorporated | Reversible ratchet wrench |
US5535646A (en) | 1995-02-07 | 1996-07-16 | Stanley Mechanics Tools, Inc. | Ratchet drive |
EP0734813B1 (en) * | 1995-03-27 | 1998-09-16 | Hand Tool Design Corporation | Ratchet wrench having ratchet teeth of higher strength |
US5996453A (en) | 1995-04-24 | 1999-12-07 | Hand Tool Design Corporation | Ratchet mechanism which resists spontaneous disengagement for use in wrenches and other tools |
US5709137A (en) | 1995-04-24 | 1998-01-20 | Blacklock; Gordon D. | Torque clutched reversible ratchet wrench |
US5626061A (en) | 1995-07-13 | 1997-05-06 | Stanley Mechanics Tools | Composite ratchet |
US5557994A (en) | 1995-07-17 | 1996-09-24 | Nakayama; Tatsuo | Ratchet handle with torque adjustment |
US5622089A (en) | 1995-12-14 | 1997-04-22 | Gifford, Sr.; Robert W. | Ratchet wrench with thumb activated direction control switch |
US6332382B1 (en) | 1996-02-05 | 2001-12-25 | Wayne Anderson | Tool with polygonal head for interchangeable bits |
US5669875A (en) | 1996-04-16 | 1997-09-23 | United States Surgical Corporation | Endoscopic surgical apparatus with longitudinal actuation |
US5878635A (en) | 1996-04-16 | 1999-03-09 | Hsieh; Chih-Ching | Reversible ratchet wrench |
US5749272A (en) | 1996-04-24 | 1998-05-12 | Phan; Tan Thanh | Ratchet screw driver |
US5636557A (en) * | 1996-05-24 | 1997-06-10 | Ma; Nai-Lin | Ratchet type ring spanner |
US5806383A (en) * | 1996-11-07 | 1998-09-15 | Hsieh; Chih-Ching | Crescent wrench |
US5782147A (en) | 1996-11-21 | 1998-07-21 | Hand Tool Design Corporation | Ratchet wrench having two-pawl action |
US5857390A (en) | 1996-12-24 | 1999-01-12 | Whiteford; Carlton L. | Reversible ratchet wrench including thin-walled sockets |
US5794496A (en) | 1996-12-05 | 1998-08-18 | Hand Tool Design Corporation | Pawl module for ratchet wrench |
US6161454A (en) | 1996-12-18 | 2000-12-19 | Hand Tool Design Corporation | Low cost ratchet wrench and method of assembly |
TW310649U (en) | 1997-01-13 | 1997-07-11 | Su-Yue Wen | Improved pawl for ratchet wrench |
US5842391A (en) | 1997-03-07 | 1998-12-01 | Chaconas; Peter Constantine | Wrench with ratcheting action |
US5873286A (en) | 1997-04-08 | 1999-02-23 | Hand Tool Design Corporation | Flex pawl |
US5911798A (en) | 1997-04-09 | 1999-06-15 | Hand Tool Design Corporation | Handle extension for ratchet wrench |
US5884538A (en) | 1997-06-13 | 1999-03-23 | Hand Tool Design Corporation | Detent for a hand tool |
US5884537A (en) | 1997-06-20 | 1999-03-23 | Chen; Chun Chiung | Ratchet tool |
US5910197A (en) | 1997-07-30 | 1999-06-08 | Hand Tool Design Corporation | Wrench with supplementary driving lugs formed on its square cross-sectioned drive tang and interchangeable sockets therefor |
US5901620A (en) | 1997-07-31 | 1999-05-11 | Hand Tool Design Corporation | Sockets for a ratchet wrench |
US5829326A (en) | 1997-09-04 | 1998-11-03 | Hand Tool Design Corporation | Cover plate for a ratchet wrench |
US5913954A (en) | 1997-09-12 | 1999-06-22 | Hand Tool Design Corporation | Pawl for a low profile wrench |
US5957009A (en) | 1997-10-16 | 1999-09-28 | Mccann; Frank | Control mechanism for ratchet wrench |
US5946987A (en) | 1997-11-07 | 1999-09-07 | Wei; Hung-Yin | Offset ratchet wrench |
US5979274A (en) * | 1998-01-07 | 1999-11-09 | Hsieh; Chih-Ching | Ratchet wheel mounting arrangement of a wrench |
US6257096B1 (en) | 1998-01-30 | 2001-07-10 | David Ling | Socket adaptor for ratchet |
US5970552A (en) | 1998-02-03 | 1999-10-26 | Hand Tool Design Corporation | Scaffold prybar ratchet |
US5927158A (en) | 1998-03-16 | 1999-07-27 | Lin; Yuan-Ho | Combination ratchet wrench |
US6000302A (en) | 1998-04-07 | 1999-12-14 | Chiang; Der Ching | Tool having rotatable driving head |
US6152826A (en) | 1998-04-29 | 2000-11-28 | Hand Tool Design Corporation | Impact universal joint |
US6006631A (en) | 1998-05-20 | 1999-12-28 | Miner; Montie H. | Through-hole quick release adapters |
US5946989A (en) | 1998-06-15 | 1999-09-07 | Hsieh; Chih-Ching | Box end for a box end wrench |
US6164167A (en) | 1998-06-22 | 2000-12-26 | Chen; Yu-Tang | Ratchet wrench having gear driven pawl |
US5964129A (en) | 1998-08-04 | 1999-10-12 | Shiao; Hsuan-Sen | Ratchet wrench with a direction control ratchet member |
US6205889B1 (en) | 1998-08-19 | 2001-03-27 | Chih-Ching Hsieh | Ratchet socket wrench |
US6065374A (en) | 1998-09-16 | 2000-05-23 | Hand Tool Design Corporation | Slider pawl |
US6134991A (en) | 1999-03-04 | 2000-10-24 | Hand Tool Design Corporation | Pawl for ratchet wrench |
US6125722A (en) | 1999-03-18 | 2000-10-03 | Snap-On Tools Company | Ratchet wrench with sealed reversing lever |
US6044731A (en) | 1999-03-25 | 2000-04-04 | Hsieh; Chih-Ching | Double-reversible ratchet wrench |
US6240813B1 (en) | 1999-07-07 | 2001-06-05 | Hand Tool Design Corporation | Drive socket |
US6230591B1 (en) | 1999-07-30 | 2001-05-15 | Hand Tool Design Corporation | Reversible ratcheting tool with improved gear wheel/pawl engagement |
US6148695A (en) | 1999-08-03 | 2000-11-21 | Hu; Bobby | Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel |
US6134990A (en) | 1999-08-05 | 2000-10-24 | Hand Tool Design Corporation | Ratcheting tool with improved gear wheel/pawl engagement |
USD434292S (en) | 1999-08-20 | 2000-11-28 | Chih-Ching Hsieh | Wrench |
US6155140A (en) | 1999-09-09 | 2000-12-05 | Tsai; Tzen Chang | Ratchet wrench |
US6216567B1 (en) | 1999-11-05 | 2001-04-17 | Bobby Hu | Ratcheting tools having an angle-adjustable head |
US6220123B1 (en) | 1999-11-30 | 2001-04-24 | Yu-Tang Chen | Structure of a ratchet wrench |
US6431031B1 (en) | 1999-12-16 | 2002-08-13 | Bobby Hu | Reversible ratcheting tool with a smaller head |
US6568299B2 (en) | 1999-12-16 | 2003-05-27 | Bobby Hu | Reversible ratcheting tool with a smaller head |
US6260448B1 (en) | 1999-12-21 | 2001-07-17 | Hand Tool Design Corporation | Top load ratchet wrench |
TW418748U (en) | 2000-01-11 | 2001-01-11 | Hu Hou Fei | Ratchet wrench |
TW415315U (en) | 2000-01-19 | 2000-12-11 | Hu Hou Fei | Ratchet tool |
US6260449B1 (en) | 2000-01-24 | 2001-07-17 | Liao I-He | Ratchet tool |
USD433896S (en) | 2000-01-28 | 2000-11-21 | Hung Yin Wei | Wrench |
TW408653U (en) | 2000-02-03 | 2000-10-11 | Hu Hou Fei | Ratcheting tool |
TW413113U (en) | 2000-02-03 | 2000-11-21 | Hu Hou Fei | Ratchet tool |
JP3515763B2 (en) | 2000-03-13 | 2004-04-05 | 厚飛 胡 | Reversible ratchet tool with small head and improved drive torque |
US6209423B1 (en) | 2000-03-30 | 2001-04-03 | Hsuan-Sen Shiao | Ratchet spanner |
US20030010159A1 (en) | 2000-04-03 | 2003-01-16 | Bobby Hu | Biasing arrangement for a pawl of a reversible ratchet-type wrench |
DE20006591U1 (en) | 2000-04-10 | 2000-06-08 | Hsieh Chih Ching | Ratchet wheel positioning device for a ratchet socket wrench with reversible working direction |
US6334373B1 (en) | 2000-04-18 | 2002-01-01 | Chih-Ching Hsieh | Ratchet wrench stop member positioning arrangement |
US6282993B1 (en) | 2000-06-19 | 2001-09-04 | Tseng Shu-Ying | Ratchet mechanism for a ratchet tool |
US20010054334A1 (en) | 2000-06-22 | 2001-12-27 | David Ling | Spanner with prevention of disengagement of fasteners |
TW447369U (en) * | 2000-06-26 | 2001-07-21 | Jang Jr Ming | Improved ratchet structure for ratchet wrench |
TW428513U (en) | 2000-07-21 | 2001-04-01 | Hu Hou Fei | Locating device of a direction switch and ratchet tools using the same |
TW437521U (en) | 2000-08-22 | 2001-05-28 | Hu Hou Fei | Ratchet driven tool |
TW444633U (en) | 2000-09-01 | 2001-07-01 | Hu Hou Fei | Ratchet tool |
DE20016719U1 (en) | 2000-09-27 | 2000-11-30 | Liao I He | Ratchet tool |
US6745647B2 (en) | 2000-11-29 | 2004-06-08 | Mei-Chen Wang | Wrench having a universal-joint ratchet wheel |
US6308594B1 (en) | 2000-12-28 | 2001-10-30 | Chin-Shun Cheng | Ratchet wrench structure |
TWM227556U (en) | 2001-01-11 | 2010-02-11 | Danaher Tool Ltd | Supplement of improved structure of high-torque compound reversible ratchet wrench |
US6591717B2 (en) | 2001-01-22 | 2003-07-15 | Hung Yin Wei | Plum blossom-shaped ratchet wrench structure |
US6457388B1 (en) | 2001-01-25 | 2002-10-01 | Ching Chen | Control member for ratchet wrench |
TW489701U (en) | 2001-02-19 | 2002-06-01 | Hou-Fei Hu | A ratchet driven wrench capable of easily manufacturing and fabricating |
US6386072B1 (en) | 2001-03-21 | 2002-05-14 | Chi Yuan-Chin | Ratchet tool |
US6382052B1 (en) | 2001-04-02 | 2002-05-07 | Shwu Ruu Chen | Ratchet tool |
US6435063B1 (en) | 2001-04-30 | 2002-08-20 | Ching Chen | Box end wrench |
US6807882B2 (en) | 2001-05-07 | 2004-10-26 | Bobby Hu | Wrench with a simplified structure |
US20020162423A1 (en) | 2001-05-07 | 2002-11-07 | Bobby Hu | Wrench with a simplified structure |
US20020166418A1 (en) | 2001-05-11 | 2002-11-14 | Hsieh Shih Kuei | Wrench capable of avoiding detachment of a screw-thread member |
US6722234B2 (en) | 2001-05-14 | 2004-04-20 | Bobby Hu | Easy-to-operate and easy-to-assemble ratcheting-type wrench |
US6435062B1 (en) | 2001-07-05 | 2002-08-20 | The Stanley Works | Ratchet wrench having easily assembling structure |
TW483377U (en) | 2001-07-13 | 2002-04-11 | Hou-Fei Hu | Micro small torque wrench with constant torque value |
TW475499U (en) | 2001-07-13 | 2002-02-01 | Hou-Fei Hu | Small torque wrench featured with fixed torque value |
TW483365U (en) | 2001-07-13 | 2002-04-11 | Hou-Fei Hu | High torque wrench |
US6647832B2 (en) | 2001-07-27 | 2003-11-18 | Bobby Hu | Wrench having two rigid supporting areas for a pawl |
US6516691B1 (en) | 2001-07-27 | 2003-02-11 | Hung Yin Wei | Racheting tool with a tapered spring positioning member |
US6427560B1 (en) | 2001-08-17 | 2002-08-06 | Hang Haw Shea | Screwdriver device |
US6382051B1 (en) | 2001-09-05 | 2002-05-07 | Chih-Min Chang | Ratchet wrench |
US6539825B1 (en) | 2001-09-20 | 2003-04-01 | Yen-Wen Lin | Single direction ratcheting wrench with stuck prevention and ratcheting direction indication |
TW503802U (en) | 2001-10-17 | 2002-09-21 | Hou-Fei Hu | Invertible ratchet wrench |
US6450066B1 (en) | 2001-10-19 | 2002-09-17 | Bobby Hu | Head of a wrench handle |
US6520051B1 (en) | 2001-12-27 | 2003-02-18 | Bobby Hu | Head of a wrench handle |
TW506308U (en) | 2002-02-08 | 2002-10-11 | Hou-Fei Hu | Improved structure for ratchet wrench |
US20030154826A1 (en) | 2002-02-21 | 2003-08-21 | Daniel Lee | Connector structure of a ratchet wrench |
TW530721U (en) | 2002-04-22 | 2003-05-01 | Yung-Jung Shiu | Simple and convenient type ratchet wrench |
US6945141B2 (en) | 2002-04-22 | 2005-09-20 | Bobby Hu | Reversible ratchet type wrench |
TW567123B (en) | 2002-07-22 | 2003-12-21 | Hou-Fei Hu | Ratchet wrench capable of fast rotation |
US6688195B1 (en) | 2002-08-07 | 2004-02-10 | Chih-Ching Hsien | Bi-directional ratchet wrench |
US6708586B1 (en) | 2002-10-15 | 2004-03-23 | Yu Tang Chen | Ratchet wrench having a direction controller that is assembled easily |
US6761092B2 (en) | 2002-11-07 | 2004-07-13 | Chih-Ching Hsien | Metal piece attraction device on ratchet tool |
-
1999
- 1999-08-03 US US09/365,738 patent/US6148695A/en not_active Expired - Lifetime
-
2000
- 2000-07-05 CA CA002313397A patent/CA2313397A1/en not_active Abandoned
- 2000-07-13 EP EP00114176A patent/EP1074348A3/en not_active Withdrawn
- 2000-08-09 US US09/635,485 patent/US6301998B1/en not_active Expired - Fee Related
-
2002
- 2002-11-21 US US10/301,491 patent/USRE43286E1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1074348A2 (en) | 2001-02-07 |
USRE43286E1 (en) | 2012-04-03 |
US6148695A (en) | 2000-11-21 |
US6301998B1 (en) | 2001-10-16 |
EP1074348A3 (en) | 2001-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2313397A1 (en) | Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel | |
US5636557A (en) | Ratchet type ring spanner | |
US6453779B2 (en) | Positioning device for a switch member of a reversible ratchet-type wrench | |
US7017453B2 (en) | Reversible ratchet-type wrench | |
US6450068B1 (en) | Ratchet type ring spanner having a larger cavity for receiving a larger pawl | |
EP0734813A1 (en) | Ratchet wrench having ratchet teeth of higher strength | |
US20020026858A1 (en) | Switching arrangement for a reversible ratchet type wrench | |
US6647832B2 (en) | Wrench having two rigid supporting areas for a pawl | |
CA2450396C (en) | Rotary tool | |
WO1996015879A1 (en) | Ratchetable open-ended wrench | |
US4926720A (en) | Rachet spanner with open mouth | |
US20030079579A1 (en) | Wrench with a fixed maximum operational torque | |
US6450066B1 (en) | Head of a wrench handle | |
US7082860B2 (en) | Tang and ratchet wrench with rotating disc operated direction change of drive and ratcheting | |
US6520051B1 (en) | Head of a wrench handle | |
US20040025646A1 (en) | Multiple function adjustable wrench | |
US6752051B2 (en) | Wrench with a fixed maximum operational torque | |
JPS62282874A (en) | Power wrench | |
CA2412131A1 (en) | Double-ended wrench with ergonomic handle portions | |
US20040200322A1 (en) | High-torque reversible ratcheting wrench | |
CA2293796C (en) | Ratchet type ring spanner | |
US6422053B1 (en) | Apparatus and method for forming a retaining ring on a wheel for a ratchet wrench | |
US20020092382A1 (en) | One piece speed wrench | |
JP2002054660A (en) | Rachet wheel provided with asymmetrical circular arc recessed teeth or non-circular arc recessed teeth and rachet tool using the same | |
US4909106A (en) | Ratchet wrench |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Discontinued |