US2951702A - Exercising device - Google Patents

Exercising device Download PDF

Info

Publication number
US2951702A
US2951702A US733362A US73336258A US2951702A US 2951702 A US2951702 A US 2951702A US 733362 A US733362 A US 733362A US 73336258 A US73336258 A US 73336258A US 2951702 A US2951702 A US 2951702A
Authority
US
United States
Prior art keywords
casing
rod
exercising device
knob
section
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.)
Expired - Lifetime
Application number
US733362A
Inventor
Goodwin Walter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US733362A priority Critical patent/US2951702A/en
Application granted granted Critical
Publication of US2951702A publication Critical patent/US2951702A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/16Supports for anchoring force-resisters
    • A63B21/1618Supports for anchoring force-resisters on a door or a door frame
    • A63B21/1645Supports for anchoring force-resisters on a door or a door frame for anchoring on a door
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/02Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters
    • A63B21/023Wound springs
    • A63B21/025Spiral springs with turns lying substantially in plane surfaces
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/15Arrangements for force transmissions
    • A63B21/151Using flexible elements for reciprocating movements, e.g. ropes or chains
    • A63B21/153Using flexible elements for reciprocating movements, e.g. ropes or chains wound-up and unwound during exercise, e.g. from a reel
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/16Supports for anchoring force-resisters

Definitions

  • the invention contemplates the provision of an exercising device in which use is made of a resiliently loaded member such as a spring loaded pulley to which is attached a belt or cable providing for various exercises as will be discussed.
  • the resiliently loaded member is supported in a portable casing to which is coupled an elongated member such as a rod which is capable of being lengthened or shortened at will.
  • the assembly of the elongated member and the casing is placed intermediate two fixed supports such as a floor and a knob and the length of the elongated member is increased to position the casing firmly in place.
  • Figure 1 is a perspective view of an exercising device provided in accordance with a preferred embodiment of the invention.
  • Figure 2 illustrates the exercising device of Figure 1 in position for use, the figure illustrating an operator using the exercising device in two of the very many possibilities of use for said device;
  • Figure 3 illustrates a longitudinal cross-section of the casing and resiliently loaded member.
  • an exercising device which includes a resiliently loaded member or pulley 10 rotatable upon an axle 12 accommodated in a casing '14.
  • the pulley 10 is spring loaded by means of a spiral spring 16 affixed at one end 18 to the axle 12 or the casing 14, and at its other end 20 to the pulley or roller 10.
  • the casing 14 consists of a circular housing portion 22 connected with a base portion 24 at the bottom of which is alfixed by welding, or otherwise, a base member 26. At the bottom of base member 26 is attached a friction pad 28 which may also be a resilient member.
  • the friction pad 28 may be of rubber or other similar material and the casing may be of aluminum or steel and so forth.
  • a strap or cable 30 which may be, for example, of flexible steel, nylon, cotton webbing or cotton rope.
  • the member 30 is looped at end 32 to accommodate a handle 34. It will readily be appreciated that the strap 30 can be manipulated with respect to an opening 36 in the casing 14 which opening is pro- Patented Sept.- 6, 1960 vided with beaded edges 38 and 40 which prevent wear of the member 30.
  • a U -shaped bracket 42 Pivotally connected to the axle 12 is a U -shaped bracket 42 which straddles the casing 14.
  • a neck 44 is attached to the bracket 42 and includes a set screw or pin 46 so that a rodor elongated member 48 may be detachably coupled to the bracket 42. It is -to be noted that the neck 44 may also define a threaded bore which will, in conventional manner, accommodate a threaded end of the rod 48.
  • the rod 48 is made of two separable sections 50 and 52, these sections having corresponding, threaded ends 54 and 56 which are engaged by a turnbuckle 58.
  • the use of turnbuckle 58 permits the effective length of rod 48 to be lengthened or shortened at will and. the purpose of this will become hereinafter apparent.
  • the section 50 of the rod 48 is connected to an angularly disposed portion 60, the section 50 making an angle of substantially 60 with a horizontal plane.
  • the section 52 has, at-its free end, a U-shaped bracket 62 which is intended to engage the neck portion 64 of a knob 66,
  • the base flange 68 of knob 66 is provided with apertures 70 so that the knob 66 can be afiixed to a wall or other supporting member and thus constitute a fixed member or reference for the exercising device.
  • the knob 66 can be a conventional door knob such as indicated in Figure 2 as being attached to a conventional door 72 in a room. This simplifies the provisions which have to be made for purposes of installing an exercising device provided in accordance with the invention inasmuch as no separate knob need be fixed to any support and, further, in that when the casing 14 and the rod 48 are removed from a conventional door knob no further piece of equipment need be removed or stored.
  • FIG 2 an operator or exerciser is shown using an exercising device provided in accordance with the invention in two of its very many possibilities of use.
  • the operator shown in full lines and in upright position is shown using the device with the strap 30 in a vertical position. More specifically, in. using this device in this position the handle 34 attached to the strap 30 is grasped in the hand of the operator and the handle is worked outwardly from the casing 14 against the tension of the spring 16, the force of which is generally and preferably approximately 7 pounds.
  • the device may be used as indicated for the operator shown in chain lines, wherein the operator is in reclining position and the handle 34 is grasped in both hands of the operator who then performs what is known as sitting up exercises.
  • the rod 48 is engaged with the knob 66 so that the rod 48 is in a vertical position.
  • the section 60 of the rod 48 is angularly disposed with respect to the remainder of the rod so that when the turnbuckle 58 is manipulated to increase the length of the rod, the force exerted through the length of the rod is divided into its different vectors.
  • the provision of the angular section 60 is such as to moreover facilitate the accommodating of the casing 14 adjacent to the door 72 or other vertical wall with the rod 48 in its vertical disposition.
  • the friction pad 28 at the bottom of the casing 14 is provided so that the casing 14 can be firmly positioned on comparatively slippery surfaces and it has been found that the horizontal components of the force acting on the to the lengthening of the rod 48 is readily overcome by the friction of pad 28. It is to be noted, however, that, if desired, the casing 14 can be permanently set intoposition by means of screws or like devices which are passed throughapertures 74..
  • the bracket 62 can be pivotally connected with the section 52 of the rod 48 in such a manner that the rod 48 can be positioned at an angle with respect to the vertical. This provision is readily efiected by means of connecting the bracket 62 to the section 52 by means of a ball and socket joint.
  • the invention is based upon a new and different principle whicheliminates entirely the need for a platform on which the actual operating mechanism need be positioned.
  • the invention achieves its purpose by providing a housing for a resiliently loaded member which housing is employed in cooperation with an elongated member whose length is capable of being adjusted between two reference supports, the housing being firmly positioned against one of the supports by the increasing of the length of said elongated member.
  • the casing need not be a closed casing as long as it performs its supporting function and that the casing can include a collapsible section which facili- 'tates a disengagement of the device from between the knob and floor or other supports.
  • An exercising device adapted for being positioned between a floor and a member fixed relative to said floor, said device comprising a support, a spring-loaded pulley on said support, a belt adapted to be wound on said pulley, a handle on said belt adapted to be g asped by an operator, friction means on said support and adapted for frictionally engaging said floor, a first rod section connected to said support, a second rod section, means rigidly connecting said sections and constituting therewith a rod of adjustable length, and a bracket on said References Cited in the file of this patent UNITED STATES PATENTS 434,771 Dowd Aug. 19, 1890 1,762,740 Rains June 10, 1930 2,131,570 Riley Sept. 27, 1938 2,725,210 Swartz Nov. 29, 1955

Description

Sept. 6, 1960 w. GOODWIN EXERCISING DEVICE Filed May 6, 1958 nub-E 1N VEN TDR. WALTER GOODWIN HIS ATTOHNEX United States Patent EXERCISING DEVICE Walter Goodwin, 50 E. 96th St., New York, NY.
Filed May '6, 1958, Ser. No. 733,362
' 3 Claims. or. 211- This invention relates to exercising devices.
It is an object of the invention to provide an improved exercising device which eliminates the need for platforms and other similar mechanisms and which is a portable device capable of being readily installed and easily stored.
It is a further object of the invention to provide an improved exercising device which is comparatively easy to manufacture and which consists of economically produced components so as to provide a relatively inexpensive product.
It is another object of the invention to provide an improved exercising device capable of being readily positionedin a conventional room in an apartment or home. 'In achieving the above and other of its objectives, the invention contemplates the provision of an exercising device in which use is made of a resiliently loaded member such as a spring loaded pulley to which is attached a belt or cable providing for various exercises as will be discussed. The resiliently loaded member is supported in a portable casing to which is coupled an elongated member such as a rod which is capable of being lengthened or shortened at will. The assembly of the elongated member and the casing is placed intermediate two fixed supports such as a floor and a knob and the length of the elongated member is increased to position the casing firmly in place.
The invention will be explained in greater detail with reference to a preferred embodiment thereof and with reference to the accompanying drawing in which:
Figure 1 is a perspective view of an exercising device provided in accordance with a preferred embodiment of the invention;
Figure 2 illustrates the exercising device of Figure 1 in position for use, the figure illustrating an operator using the exercising device in two of the very many possibilities of use for said device; and
Figure 3 illustrates a longitudinal cross-section of the casing and resiliently loaded member.
In the drawing, an exercising device is illustrated which includes a resiliently loaded member or pulley 10 rotatable upon an axle 12 accommodated in a casing '14. The pulley 10 is spring loaded by means of a spiral spring 16 affixed at one end 18 to the axle 12 or the casing 14, and at its other end 20 to the pulley or roller 10.
The casing 14 consists of a circular housing portion 22 connected with a base portion 24 at the bottom of which is alfixed by welding, or otherwise, a base member 26. At the bottom of base member 26 is attached a friction pad 28 which may also be a resilient member. The friction pad 28 may be of rubber or other similar material and the casing may be of aluminum or steel and so forth.
Attached to the pulley 10 is a strap or cable 30 which may be, for example, of flexible steel, nylon, cotton webbing or cotton rope. The member 30 is looped at end 32 to accommodate a handle 34. It will readily be appreciated that the strap 30 can be manipulated with respect to an opening 36 in the casing 14 which opening is pro- Patented Sept.- 6, 1960 vided with beaded edges 38 and 40 which prevent wear of the member 30.
Pivotally connected to the axle 12 is a U -shaped bracket 42 which straddles the casing 14. A neck 44 is attached to the bracket 42 and includes a set screw or pin 46 so that a rodor elongated member 48 may be detachably coupled to the bracket 42. It is -to be noted that the neck 44 may also define a threaded bore which will, in conventional manner, accommodate a threaded end of the rod 48.
The rod 48 is made of two separable sections 50 and 52, these sections having corresponding, threaded ends 54 and 56 which are engaged by a turnbuckle 58. The use of turnbuckle 58 permits the effective length of rod 48 to be lengthened or shortened at will and. the purpose of this will become hereinafter apparent.
The section 50 of the rod 48 is connected to an angularly disposed portion 60, the section 50 making an angle of substantially 60 with a horizontal plane. The section 52 has, at-its free end, a U-shaped bracket 62 which is intended to engage the neck portion 64 of a knob 66, The base flange 68 of knob 66 is provided with apertures 70 so that the knob 66 can be afiixed to a wall or other supporting member and thus constitute a fixed member or reference for the exercising device.
Alternative to the provision of a knob 66 as a separate member constituting a part of the device, the knob 66 can be a conventional door knob such as indicated in Figure 2 as being attached to a conventional door 72 in a room. This simplifies the provisions which have to be made for purposes of installing an exercising device provided in accordance with the invention inasmuch as no separate knob need be fixed to any support and, further, in that when the casing 14 and the rod 48 are removed from a conventional door knob no further piece of equipment need be removed or stored.
In Figure 2 an operator or exerciser is shown using an exercising device provided in accordance with the invention in two of its very many possibilities of use. For example, the operator shown in full lines and in upright position is shown using the device with the strap 30 in a vertical position. More specifically, in. using this device in this position the handle 34 attached to the strap 30 is grasped in the hand of the operator and the handle is worked outwardly from the casing 14 against the tension of the spring 16, the force of which is generally and preferably approximately 7 pounds.
Alternatively the device may be used as indicated for the operator shown in chain lines, wherein the operator is in reclining position and the handle 34 is grasped in both hands of the operator who then performs what is known as sitting up exercises.
From what has been stated above, it will be obvious that the various exercises which can be performed with the use of the illustrated device include those exercises in which the strap 30 is disposed at various angles -to the horizontal and vertical and that the device thus has many possibilities of use.
Preferably, the rod 48 is engaged with the knob 66 so that the rod 48 is in a vertical position. The section 60 of the rod 48 is angularly disposed with respect to the remainder of the rod so that when the turnbuckle 58 is manipulated to increase the length of the rod, the force exerted through the length of the rod is divided into its different vectors. The provision of the angular section 60 is such as to moreover facilitate the accommodating of the casing 14 adjacent to the door 72 or other vertical wall with the rod 48 in its vertical disposition.
The friction pad 28 at the bottom of the casing 14 is provided so that the casing 14 can be firmly positioned on comparatively slippery surfaces and it has been found that the horizontal components of the force acting on the to the lengthening of the rod 48 is readily overcome by the friction of pad 28. It is to be noted, however, that, if desired, the casing 14 can be permanently set intoposition by means of screws or like devices which are passed throughapertures 74..
It is further to be noted that, if desired, the bracket 62 can be pivotally connected with the section 52 of the rod 48 in such a manner that the rod 48 can be positioned at an angle with respect to the vertical. This provision is readily efiected by means of connecting the bracket 62 to the section 52 by means of a ball and socket joint.
In summary, it will be noted that the invention is based upon a new and different principle whicheliminates entirely the need for a platform on which the actual operating mechanism need be positioned. The invention achieves its purpose by providing a housing for a resiliently loaded member which housing is employed in cooperation with an elongated member whose length is capable of being adjusted between two reference supports, the housing being firmly positioned against one of the supports by the increasing of the length of said elongated member.
There will now be obvious to those skilled in the art many modifications and variations of the structure set forth which modifications and variations do not depart essentially from the spirit of the invention as defined in the following claims. For example, it will be readily appreciated that the casing need not be a closed casing as long as it performs its supporting function and that the casing can include a collapsible section which facili- 'tates a disengagement of the device from between the knob and floor or other supports.
What is claimed is:
1. An exercising device adapted for being positioned between a floor and a member fixed relative to said floor, said device comprising a support, a spring-loaded pulley on said support, a belt adapted to be wound on said pulley, a handle on said belt adapted to be g asped by an operator, friction means on said support and adapted for frictionally engaging said floor, a first rod section connected to said support, a second rod section, means rigidly connecting said sections and constituting therewith a rod of adjustable length, and a bracket on said References Cited in the file of this patent UNITED STATES PATENTS 434,771 Dowd Aug. 19, 1890 1,762,740 Rains June 10, 1930 2,131,570 Riley Sept. 27, 1938 2,725,210 Swartz Nov. 29, 1955
US733362A 1958-05-06 1958-05-06 Exercising device Expired - Lifetime US2951702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US733362A US2951702A (en) 1958-05-06 1958-05-06 Exercising device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US733362A US2951702A (en) 1958-05-06 1958-05-06 Exercising device

Publications (1)

Publication Number Publication Date
US2951702A true US2951702A (en) 1960-09-06

Family

ID=24947302

Family Applications (1)

Application Number Title Priority Date Filing Date
US733362A Expired - Lifetime US2951702A (en) 1958-05-06 1958-05-06 Exercising device

Country Status (1)

Country Link
US (1) US2951702A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3256015A (en) * 1963-01-09 1966-06-14 William E Perrin Exercising apparatus
US3451677A (en) * 1966-08-15 1969-06-24 Athletic Devices Inc Resister football trainer
US4135714A (en) * 1976-02-03 1979-01-23 Hughes Ralph L Golf swing muscle developer
US4565367A (en) * 1981-05-26 1986-01-21 Spymark, Inc. Hand held body engaging exercise device
US4643420A (en) * 1985-01-07 1987-02-17 Riley Robert Q Floor-mounted exercise machine
US5226867A (en) * 1992-06-24 1993-07-13 Daniel Beal Exercise machine utilizing torsion resistance
US5242351A (en) * 1989-03-16 1993-09-07 Berg Ernst H E Flywheel inertial exercise device
US5437591A (en) * 1994-10-28 1995-08-01 Chen; Chih-Liang Chest expander
US7318810B1 (en) * 2002-09-20 2008-01-15 Shirley M Benson Benson birthing rope for aiding childbirth
US20090036276A1 (en) * 2006-02-28 2009-02-05 Andrew Robert Loach Exercise machine
US20090062089A1 (en) * 2007-09-02 2009-03-05 William Gene Suiter Multi-Functional Exercise Apparatus with Adjustable Resistance
US7621856B1 (en) * 2008-09-23 2009-11-24 Keith Gary S Reel mechanism
US8465401B1 (en) 2009-11-12 2013-06-18 Stephen P. Ihli Portable exercise apparatus and methods
US8523745B1 (en) * 2009-11-12 2013-09-03 Stephen P. Ihli Exercise methods and apparatus
US8556785B1 (en) * 2009-11-12 2013-10-15 Stephen P. Ihli Golf exercise methods and apparatus
US8556783B1 (en) * 2009-11-12 2013-10-15 Stephen P. Ihli Exercise resistance methods and apparatus
US8622879B1 (en) * 2009-11-12 2014-01-07 Stephen P. Ihli Exercise shoe methods and apparatus
US8998779B1 (en) 2013-03-05 2015-04-07 Stephen P. Ihli Exercise resistance apparatus
US10398919B2 (en) 2016-04-05 2019-09-03 Mark A. Krull Exercise methods and apparatus
US20190275396A1 (en) * 2018-03-09 2019-09-12 Gary Irwin Apparatus for Increasing Core Strength and Improving Balance
US10512812B2 (en) 2017-04-03 2019-12-24 Mark A. Krull Exercise resistance methods and apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US434771A (en) * 1890-08-19 Exercising machine
US1762740A (en) * 1928-05-14 1930-06-10 Joseph F Bashara Draw-works brace
US2131570A (en) * 1935-07-27 1938-09-27 Herbert E Riley Exercise device
US2725210A (en) * 1955-11-29 Swartz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US434771A (en) * 1890-08-19 Exercising machine
US2725210A (en) * 1955-11-29 Swartz
US1762740A (en) * 1928-05-14 1930-06-10 Joseph F Bashara Draw-works brace
US2131570A (en) * 1935-07-27 1938-09-27 Herbert E Riley Exercise device

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3256015A (en) * 1963-01-09 1966-06-14 William E Perrin Exercising apparatus
US3451677A (en) * 1966-08-15 1969-06-24 Athletic Devices Inc Resister football trainer
US4135714A (en) * 1976-02-03 1979-01-23 Hughes Ralph L Golf swing muscle developer
US4565367A (en) * 1981-05-26 1986-01-21 Spymark, Inc. Hand held body engaging exercise device
US4643420A (en) * 1985-01-07 1987-02-17 Riley Robert Q Floor-mounted exercise machine
US5242351A (en) * 1989-03-16 1993-09-07 Berg Ernst H E Flywheel inertial exercise device
US5226867A (en) * 1992-06-24 1993-07-13 Daniel Beal Exercise machine utilizing torsion resistance
US5437591A (en) * 1994-10-28 1995-08-01 Chen; Chih-Liang Chest expander
US7318810B1 (en) * 2002-09-20 2008-01-15 Shirley M Benson Benson birthing rope for aiding childbirth
US8070657B2 (en) * 2006-02-28 2011-12-06 Andrew Robert Loach Exercise machine
US20090036276A1 (en) * 2006-02-28 2009-02-05 Andrew Robert Loach Exercise machine
US20090062089A1 (en) * 2007-09-02 2009-03-05 William Gene Suiter Multi-Functional Exercise Apparatus with Adjustable Resistance
US8083656B2 (en) * 2007-09-02 2011-12-27 William Gene Suiter Multi-functional exercise apparatus with adjustable resistance
US7621856B1 (en) * 2008-09-23 2009-11-24 Keith Gary S Reel mechanism
US8465401B1 (en) 2009-11-12 2013-06-18 Stephen P. Ihli Portable exercise apparatus and methods
US8523745B1 (en) * 2009-11-12 2013-09-03 Stephen P. Ihli Exercise methods and apparatus
US8556785B1 (en) * 2009-11-12 2013-10-15 Stephen P. Ihli Golf exercise methods and apparatus
US8556783B1 (en) * 2009-11-12 2013-10-15 Stephen P. Ihli Exercise resistance methods and apparatus
US8622879B1 (en) * 2009-11-12 2014-01-07 Stephen P. Ihli Exercise shoe methods and apparatus
US8998779B1 (en) 2013-03-05 2015-04-07 Stephen P. Ihli Exercise resistance apparatus
US10398919B2 (en) 2016-04-05 2019-09-03 Mark A. Krull Exercise methods and apparatus
US10512812B2 (en) 2017-04-03 2019-12-24 Mark A. Krull Exercise resistance methods and apparatus
US20190275396A1 (en) * 2018-03-09 2019-09-12 Gary Irwin Apparatus for Increasing Core Strength and Improving Balance

Similar Documents

Publication Publication Date Title
US2951702A (en) Exercising device
US4521013A (en) Resilient type exercising device
US1623670A (en) Exercising apparatus
US6770014B2 (en) Resistance type exercise device
US4494662A (en) Mounted spring device for resisting flexing
US4114874A (en) Appliance for swimmers
US6315701B1 (en) Portable exercise machine
US4093211A (en) Combination jump rope and flexible exerciser
US2959414A (en) Exerciser
US4174832A (en) Friction type exercise device
US5941802A (en) Pull-up assistant
US20020022555A1 (en) Portable doorway apparatus for upper and lower body strengthening and conditioning
US4428578A (en) Exercising device
JPS62500431A (en) Elastic tension training device with a cable wrapped between multiple pulleys
US4557480A (en) Portable exercise device
US20160045778A1 (en) Exercise device for suspended body weight training
US3608900A (en) Frictional resistant exercising device
US7223219B2 (en) Frictional variable resistance exercise device
US5505681A (en) Portable athletic exerciser pulling device
US20180311523A1 (en) Modular Structure for Physical Exercise
NL2014596B1 (en) Belt pulling exercise apparatus.
KR20180118184A (en) Exercise device
US20130196831A1 (en) Door-frame mounted exercise strap
US9889332B2 (en) Exercise device
US6261208B1 (en) Rope pulling frictional exercise device