US 2613564 A
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Oct 1952- G. M. WALRAVEN ETAL 2,613,554
ADJUSTABLE AND REVERSIBLE STUD REMOVERS AND RESETTERS Filed Jan. 5, 1949 Patented Oct. 14, 1952 ADJUSTABLE AND REVERSIBLE STUD REMOVERS AND RESETTERS George M. Walraven and Raymond G. Knudsen,
Kenosha, Wis., assignors to Snap-On Tools Corporation, Kenosha, Wis., a corporation of Delaware Application January 3, 1949, Serial No. 69,008
This invention relates to adjustable and reversible stud removers and resetters, although certain features thereof may be employed with equal advantage for other purposes.
It contemplates more especially the provision of improved and more effective instrumentalities for gripping various sized studs for efiecting the turning thereof in one direction or another so that their removal or resetting is effectively accomplished.
Numerous types of stud removers have heretofore been proposed, but these have not proven entirely satisfactory in all situations involving studs which do not have polygonal heads or nuts to afford the use of a standard wrench or socket to impart rotary movement thereto. Many problems are involved in grasping various sized studs, especially for turning in either direction and to accomplish the grasping thereof without any polygonal head or thread so that standard tools may be utilized.
One object of the present invention is to simplify the construction and improve the operation of devices of the character mentioned.
Another object is to provide an improved stud engaging mechanism that is adjustable to accommodate different sizes of studs to effectively remove or reset them depending upon the requirements of the particular task.
Still another object is to provide improved gear actuated stud engaging jaws which are manually displaceable to accommodate studs of different sizes.
A further object is to provide improved jawengaging means that are spring actuated to a predetermined position so that a manual displacement can be effected in one direction or another to efiect stud removal or. resetting.
A still further object is to provide improved jaw actuators that are compactly arranged within a housing to preset stud-engaging jaws for eiiectively grasping variously sized studs to selectively impart rotation thereto in either direction for removal or resetting purposes.
Still a further object is to provide spring positioned stud-engaging jaws with manually displaceable means operatively connected therewith to selectively engage studs of any size within a predetermined range. i
Other objects and advantages will appear from the following description of an illustrative embodiment of the present invention.
In the drawing:
Figure 1 is a bottom plan view of a device embodying features of the present invention.
Figure 2 is a side view and elevation of the stud remover shown in Figure 1.
Figure 3 is a top plan view of the device shown in'Figure 2.
Figure 4 is a bottom plan view of the stud remover with the housing plate removed to clarify the showing. 7
Figure 5 is a bottom plan view similar to Figure 4 with all of the gripping and movable elements removed to show the spring tensioning instru mentalities.
Figure 6 is a sectional view through the shanks of the gripping elements and showing the gear actuated instrumentalities for displacing the jaws, viewed substantially along line VI--VI of Figure 8.
Figure '7 is a bottom plan view of a device similar to Figure 4 with the jaws displaced to a position engageable with a stud for imparting rotation thereto in a clockwise direction (Viewed from Figure '7) and taken substantially along line VII-VII in Figure 8.
Figure 8 is a sectional view in elevation taken substantially along line VIIIVIII of Figure 1.
Figure 9 is a top plan view of a stud-gripping jaw shown assembled in Figures 4 and 7.
Figure 10 is a side View in elevation of the jaw shown in Figure 9.
The structure selected for illustration is not intended to serve as a limitation upon the scope or teachings of the invention, but is merely illustrative thereof. There may be considerable variations and adaptations of all or part of the teachings depending upon the dictates of commercial practice.
The present embodiment comprises a substantially cylindrical housing l0 which merges with an inwardly curved hood or enclosure 1 I thatin turn connects with an elongated cylindrical shank E2. The housing 10, hood II, and shank l2 are formed integral to comprise a unitary structure that terminates in a polygonal extremity such as a hexagon l3 which is adapted to be engaged by a wrench or wrench socket to impart rotation to the housing structure in either direction after a stud has been gripped for removal or resetting as will appear more fully hereinafter.
The interior cylindrical chamber i l of the housing l0 communicates with an annular shoulder [5 that, in turn, communicates with an axial elongated bore 16 provided in the elongated housing shank I2 to extend entirely therethrough to accommodate a stud which may be disposed therein for gripping as will appear more fully hereafter. The annular shoulder l5 receives a collar I! which is rotatively mounted therein to serve as a complement thereof. The collar I! is provided with diametrically opposed angular notches |8-l9 which are defined by converging walls that cooperate with an elongated detent that is reciprocally mounted in an aperture or bore 2| extending radially through the hood portion H ofthe housing ID in alignment with the internal annular shoulder IE to engage the annular notch I8 or [9, depending upon the position of insertion of the collar H.
A spring 22 is disposed in the aperture 01'. bore 2| behind the detent 20 to normally urge the latter in engagement with the angular notch l8 or [9. As shown, the radial aperture 2| communicates with an enlarged orifice which is intended to receive a closure cap against which the spring 22 abuts. placing ring or band 24 is mounted in an annular groove provided on the periphery on the hood portion ll of the housing [0 in line with the spring detent receiving aperture or bore 21 retaining the spring retaining closure cap 23 in assembled position and to actuate the stud-engaging jaws or grippers as will appear more fully hereinafter. The external ring or band 24 is retained in the annular groove 25 by means of a split retainer wire ring 23 which rests in a correspondingly sized and shaped groove 21 to rotatively retain the external actuator ring or band 24 in assembled position against removal from the annular groove 25. To enable the convenient manual rotary displacement of the band 24, the exposed surface thereof is knurled as at 28 (Figure 2) so that an effective finger grasp thereof will result in its rotation in either direction to position the studengaging jaws or grippers to be hereinafter described.
'It isto be noted that the collar [1 has a reduced. shoulder 29 extending in the housing chamber Mto receive a ring gear 30 for rotation thereon. The ring gear 30 has a radially extending arm 3| formed thereon to project through anarcuate slot 32 (Figure 7) in the housing into engage in a notch 33 provided in the knurled ring 24 so that rotation of the latter will cause corresponding rotation in either direction of the gear ring 30 within the limits of the arcuate housing slot 32 so that gear ring 30 Will rotate with the collar l1. Itis to be noted that the collar I1 is provided with tangential parallel portions 34-35 in the'shoulder 29 thereof to receive the correspondingly shaped and com plemental axial bore of the ring gear 30 which will rotate the collar l1 therewith responsive to manual rotary movement imparted to the band 24. Consequently, 'the ring gear 30 will be spring impelled-by the detent 20 to normally assume apredeterminedposition as the spring urged detent exerts a camming action on either of the angular walls of the collar notches is or [9.
The gear ring .30 has gear teeth 36 provided equidistantly thereon in a plurality of sectors, in this instance three symmetrically disposed at 120 angular sectors, to mesh with -a co rresponding number of gear sectors 31. The gear sectors 31, in thisinstance three, that are each provided with polygonal apertures 38 to fit over correspondingly shaped shoulders 39 (F*igure 10) on the ends of the shank portions 40 of a plurality of stud engaging jaws or grippers 4!, in this instance three in number. The stud engaging jaws 4| are substantially arrow-shaped and have oppositely extending and converging jaw surfaces 42-.-43 that meet along a median line 44 A jaw positioning or dis thereof to engage a threaded stud 45 of the type usually found in engine block heads. The jaws or grippers 4| engage the studs 45 on one or the other of the converging engaging surfaces 4243 thereof. The converging engaging surfaces 4243 are slightly convex to effectively gasp the cylindrical wall of the stud 45 depending on the direction of rotation to be imparted thereto. To render the engagement between the jaw engaging surfaces 4243 and the smooth cylindrical wall of the stud 45 more effective and insure against slippage, the slightly convex jaw engaging surfaces; 42-43 are provided with transverse teeth or serrations 454S, respectively.
The jaw shanks 40 are provided with apertures or bores 41 therethrough for pivotal mounting on. screw fasteners 48 threaded at their extremities 49 to engage correspondingly threaded apertures 50 provided in the hood portion H of the housing It. The screw fasteners 48, in this instance three, not only serve as pivotal mounts for thejaws or grippers 4|-, but also serve to retain a cover plate 5i in position-for support on an annular shoulder 52 providedin the housing in in communication with the open end 53 thereof. The cover plate 5! has a central or axial opening 54 which is sized toreceive the maximum diameter-of a stud 25 that can be effectively grasped with the jaws or grippers-4 1 from thesmallest size to the largest. determined by the range for which the instrumentalities: are designed.
With this arrangement, the gear. sectors 31 are actuated by thegear ring 3t: pivotally to displace the stud engaging jaws, or grippers 31 in either direction from their initial closed radial position. This is effected responsive to the rotation of the ring or band 26 for opening the jaws H to a position that willaocommodate a particular sized stud 45 that is. disposed throughthe central opening 54in the housing .cover plate 5|.
It should be noted that the spring: impelled detent 20 will normally urge the jaws or grippers 4! to their true radial position as: illustrated in Figurev 4 so thatmanual displacement of the ring or band 24 in one direction; or the other will displace the jawsor grippers 4i outwardly on one side or the other of the stud, 45 and offset from the initial radial jaw position which are the lines from the center of the stud 45to the centers or axes of the threaded jaw mounts 48, thedirection of pivotal displacement beingdetermined by the direction in which thestud ,45 is to be turned.
After the ring. or band 24 hasv been rotated .to spread the jaws or grippers 41 and the stud 45 has been engaged by releasing the actuating ring or band 24 so the jaws or grippers 4| will be spring urged in contact with the stud45, a wrench or wrench socket is applied to the polygonalextremity l3 of the housingshank l2ito forcefully remove or reset the stud 45 depending .-upon the requirements of any particular task. It will be apparent from the foregoing description that a very effective grasp and turning movement may be imparted to studs 45 owingto the improved and simplified operating instrumentality described and illustrated in the preferred embodiment of the present invention. Obviously, a change in proportion and size of the-instrumentality will enable even larger studs-to be removed or reset than illustrated, and nothing-herein shall be construed as a limitation thereon.
While we have illustrated and described a preferred embodiment of this invention, it must be understood that the invention is capable of considerable variation and modification without departing from the spirit of the invention. We, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail ourselves of such variations and modifications as come Within the scope of the appended claims.
1. In a stud remover and resetter, the combination with a housing having an opening therein to receive a stud for gripping engagement, of a plurality of stud engaging grippers movably mounted in said housing for displacement along an are substantially intersected by the common housing opening and gripper radii, an external ring rtatively mounted on said housing, gripper actuating means including intermeshing gear teeth elements operatively connected with said external ring for shifting said grippers to one or the other side of said gripper radii to receive a stud for gripping on one or the other side thereof for removal or resetting purposes, and means for normally urging said grippers to assume an initial inoperative position in alignment with said common radii.
2. In a device of the character mentioned, the combination with a housing adapted to freely receive an elongated stud therein, of a plurality of stud grippers pivotally mounted in said housing, said grippers having opposite engaging surfaces for selective directional displacement in the path of a stud disposed in said housing, gear segments detachably associated with said grippers for rotation therewith, a gear ring journalled in said housing within the radius of said gripper mountings for meshing engagement with said gear segments, an external actuator on said housing operatively connected to said gear ring, and spring means for normally urging said gear ring to assume an initial position in conjunction with said grippers.
3. In a device of the character mentioned, the combination with a housing adapted to freely receive an elongated stud therein, a plurality of stud grippers movably mounted in said housing for displacement in the path of a stud received therein, circular means journalled in said housing for free rotation therein, spring means for normally retaining said circular means in an initial position against rotary displacement in either direction, complemental means interposed between said circular means and grippers for displacing the latter against the normal urge of said spring means, and means on said housing for enabling the rotation thereof to turn a stud held fast by said grippers.
4. In a device of the character mentioned, the combination with a housing adapted to freely receive an elongated stud therein, a plurality of stud grippers movably mounted in said housing for displacement in the path of a stud received therein, circular means journalled in said housing for free rotation therein, there being an angular notch in said circular means, spring impelled detent means coacting with said angular notch for normally retaining said circular means in an initial position against rotary displacement in either direction, complemental means interposed between said circular means and grippers, and an external actuator associated with said housing to operate said complemental means for displacing the latter against the normal urge of said spring means.
GEORGE M. WALRAVEN. RAYMOND G. KNUDSEN.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 222,056 Kirkham Nov. 25, 1879 651,306 Gabriel June 5, 1900 868,471 Oubridge Oct. 15, 1907 1,140,567 Boring May 25, 1915 1,675,064 Stone June 26, 1928 2,027,534 Ingersoll Jan. 14, 1936 2,408,335 Oliver et a1 Sept. 24, 1946 2,516,394 Keiser July 25, 1950 FOREIGN PATENTS Number Country Date 39,434 France Aug. 11, 1931 (Addition to No. 636,996)
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