US3802701A - Friction type exercising device - Google Patents

Friction type exercising device Download PDF

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US3802701A
US3802701A US00187743A US18774371A US3802701A US 3802701 A US3802701 A US 3802701A US 00187743 A US00187743 A US 00187743A US 18774371 A US18774371 A US 18774371A US 3802701 A US3802701 A US 3802701A
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platform
handle
shaft
resistance
recited
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L Good
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L Good
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    • 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
    • A63B21/012Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters
    • A63B21/015Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters including rotating or oscillating elements rubbing against fixed elements
    • 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
    • A63B21/00058Mechanical means for varying the resistance
    • A63B21/00069Setting or adjusting the resistance level; Compensating for a preload prior to use, e.g. changing length of resistance or adjusting a valve
    • 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
    • A63B21/045Exercising 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 having torsion or bending or flexion element
    • A63B21/0455Exercising 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 having torsion or bending or flexion element having torsion element around its longitudinal axis
    • 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
    • A63B21/40Interfaces with the user related to strength training; Details thereof
    • A63B21/4041Interfaces with the user related to strength training; Details thereof characterised by the movements of the interface
    • A63B21/4049Rotational movement
    • 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
    • A63B21/026Bars; Tubes; Leaf springs
    • 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
    • A63B21/04Exercising 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 attached to static foundation, e.g. a user

Abstract

A platform has a vertically mounted, adjustable rotary resistance unit thereon, to which the lower end of the center leg of a vertically disposed T-shaped handle is connected. A subject standing on the platform grips the cross bar of the handle, and rotates the handle back and forth against the force of the resistance unit, thereby exercising selected body muscles. A torque frictional resistance is developed by the resistance unit against the twisting of the center leg by a user acting on the cross bar. The resistance unit has an adjustable clamp that grips a rotor on the lower end of the center leg to vary the frictional resistance to the rotation of the rotor. An anchored vertical bar may be used to lockingly engage the lower most portion of the Tshaped handle so as to offer resistance to twisting of the Tshaped handle. An adjustable collar may be provided on the vertical bar to vary the amount of torque necessary to twist the vertical bar.

Description

United States Patent 1191 [451 Apr. 9, 1974 Good, Jr. 1 a

[ FRICTION TYPE EXERCISING DEVICE '[76] Inventor: Lewis B. Good, Jr., l45 Johnson,

East Peoria, Ill.

[22] Filed: Oct. 8, 1971- [21] Appl. No.: 187,743

521 u.s.c1 272/79 1), 272/1310 3, 272/1310. 4, 272/83 A 51 1m. (:1 A63b 21/00 [58] Field of Search. 272/79 D, 79 R, 79 B, DIG. 3, 272/70.l, 83 A Primary ExaminerRichard C. Pinkham Assistant Examiner-William R. Browne Atl0rney,Agent, or FirmBacon & Thomas [57] ABSTRACT A platform has a vertically mounted, adjustable rotary resistance unit thereon, to which the lower end of the center leg of a vertically disposed T-shaped handle is connected. A subject standing on the platform grips the cross bar of the handle, androtates the handle back and forth against the force of. the resistance unit, thereby exercising selected body muscles. A torque frictional resistance is developed by the resistance unit against the twisting of the center'leg by a user acting on the cross bar. The resistance unit has an adjustable clamp that grips a rotor on the lower end of the center leg to vary the frictional resistance to the rotation of the rotor. An anchored vertical barmay be used to lockingly engage the lower most portion of the T- shaped handle so as to'offer resistance to twisting of the T-shaped handle. An adjustable collar may be provided on the vertical bar to vary the amount of torque necessary to twist the vertical .bar.

11 Claims, 8 Drawing Figures PATENTEDAPR 9 m4 SHEEI 2 0F 2 I I IHHIIHI FRICTION TYPE EXERCISING DEVICE BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to devices for exercising muscles of the human body, and more specifically to a unique adjustable rotary motion exerciser device adapted to work those muscle groups utilized to twist or turn the body.

2. Description of the Prior Art There have been devices designed for use by athletes, businessmen and others who feel the need to exercise body muscles. Such exercises may be undertaken for the purpose simply of keeping in good physical condition, or they may be specifically designed for conditioning certain muscles so that the subject can be more profficient in certain athletic activities, like golf. The subjectmay want to do such muscle exercises at home, in a gymnasium, or at the office, and thus the device employed should be readily adaptable to any location.

The present invention isspecifically intended for use in exercising those muscles used in twisting or turning the body. While devices have been'produced for this general purpose, generally they suffer from one or more deficiencies that do not make them acceptable for use substantially anywhere by the average person. For example, some such devices are designed so that the subject must assume an unnatural position when using them, which limits their effectiveness and can even cause physical injury.

In other available devices permanent installation is required, a feature unacceptable in many homesand offices, and the devices are either unadjustable, or can be adjusted only by a fairly complicated arrangement. In addition, some presently, available devices are ungainly in appearance, and are relatively expensive to purchase.

There is thus need for a rotary motion exercise device that is easily adjustable and economical, neat in appearance, and which can be easily usedwherever desired. The present invention is intended to satisfy that need.

SUMMARY OF THE INVENTION The present rotary motion exerciser includes a platelike platform on which the subject stands, and which can be placed to rest on a carpeted floor in the office or home, on a gymnasium floor, on anoutdoor surface, or wherever it is desired to use the device. A resistance unit is mounted vertically on the platform, and the grasps when using The resistance unit can be of different constructions, and is designed to provide an adjustable resistance torque. Two different embodiments of the resistance unit are disclosed herein, one employing friction to generate the resistance torque, and the other utilizing a torsion bar; both embodiments are designed to be easily adjustable.

The friction resistance unit includes a split cylinder having a portion of its circumference welded to a mounting pad that is in turn secured to the platform,

the ends of the split cylinder having confronting flanges thereon with aligned bores, one of the bores being threaded. An adjustment screw extends through the other flange bore, and is threaded into the threaded bore in the first flange.

A rotor is received in the split cylinder, and carries an axial shaft to which the T-shaped handle is connected, the handle being adjustable vertically. Resistance torque is generated by friction resistance between the split cylinder and the rotor occurring when the latter is rotated by the handle, the value of such resistance torque being easily adjusted merely by turning the adjustment screw.

The torsion bar resistance unit includes a vertically disposed cylindrical housing secured at its lower end to a mounting plate, which plate is in turn secured to the platform. The housing has diametrically opposed vertical slots therein, andreceivesa rectangular torsion bar having a retainer collar slidably received on the lower portion thereof, the collar having diametrically opposed lugs thereon that are slidably received the opposed vertical slots of the housing.

The lower end of the center leg of the T-shapedhandle in this embodiment of the invention carries a retainer head having a transverse channel slot therein for receiving the upper end of the torsion bar. Thus, when the handle is rotated the torsion bar is twistedover the length thereof located between the retainer head and the position of the retainer collar, thereby generating resistance torque.

The value, of the resistance torque generated by,the torsion-bar resistance unit is determined by the vertical position of the retainer collar; When the collar is at-the extreme lower end of the torsion bar, the effective length of the bar is at its greatest value and resistance torque will be at a minimum. Sliding the .collar upwardly on its torsion bar reduces the bars effective length, and causes a greater resistance torque to be generated. The retainer collar is secured in any selected one of several possible vertical positions by a retainer pin, received through a selected one of several vertically spaced and aligned bores in the cylindrical housing. i

With either resistance unit it is thus possible to readily adjust the, resistance torque. Further, the exerciser device of either embodiment is neat in appearance and spread apart and placed on opposite sides of the resistance unit. The opposite endsof the handlebar are then grasped, and the subject then twists or' turns his body to thereby impart rotary motion to the handle. The resistance unit generates force opposing back and forth rotary motion of the handle, whereby the muscles used when twisting or turning the body are exercised. The exerciser is self-contained and need not be secured to the floorby nails or screws, the weight of the user holding it in place.

can be easily moved from one location to another, an is economical to construct.

It is a principal object of the presentinvention to provide a safe, effective device to exercise particular muscle groups of the human body, especially the muscles which allow the body to twist or turn.

Another object is to provide an exerciser device for use in exercising and reducing the mid-section in particular, and for generally promoting physical fitness of the user.

A further object is to provide a rotary motion exerciser wherein'the subject can exercise against resistance torque generated mechanically either by friction or a torsion bar.

Yet another object is to provide a rotary motion exercis'er device which is adjustable in height to fit various persons, and which has an adjustable resistance unit whereby the user can adjust the degree of resistance torque to suit his own needs.

Still another object is to provide an exercise device which can be used indoors and without damage to floors or floor coverings, and which is portable.

Other objects and many of the attendant advantages of the present invention will become readily apparent from the following Description of the Preferred Embodiments, when taken together with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is a fragmentary, vertical sectional view taken along the line 3 -3 of FIG. 2, showing further details of the friction resistance unit, and the adjustable in height exerciser handle;

FIG. 4 is a front elevational view of a second embodiment of the rotary exerciser device of the invention, utilizing a torsion bar resistance unit;

FIG. 5 is a side'elevational view of the device of FIG. 4, showing in particular the vertical adjustment slots in the cylindrical housing on the resistance unit;

FIG. 6 is an enlarged, fragmentary vertical sectional view taken on the line 66 of FIG. 5, showing the interior of the resistance unit;

FIG. 7 is a fragmentary sectional view taken on the line 77 of FIG. 6, showing in particular the retainer collarjand how such is arranged; and

FIG. 8 is an exploded perspective view of the torsion bar, the retainer collar and the lower end of the handle, showing how the torsion bar is operated to produce resistance torque.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIGS. 1-3 of the drawings, a first embodiment of the present rotary exerciser device is indicated generally at 2, and includes a plate-like platform 4 having a vertically oriented friction resistance unit 6 mounted centrally thereon, said unit including a shaft 8 to the upper end 10 of which the center leg 12 of a T-shaped handle 14 is connected, the handle 14 having a horizontal cross bar 16 at its upper end. The dimensions and configuration of the platform 4 can be varied, but such is to be sufficiently large so that the feet of a subject using the exerciser device 2 can be comfortably accommodated thereon, the weight of the subject being sufficient to hold the device 2 in position on a floor 17 or other supporting surface without the use of screws, nails, stakes or the like.

The friction resistance unit 6 includes a mounting pad 18 secured centrally to the upper surface of the platform 2- by screws or bolts 20, the bolts 20 passing through bores '22 in the pad 18 and being threaded into threaded bores 24 provided in the platform 2. The mounting pad 18 has a circular hole 26 centrally thereof, which is in alignment with a hole 28 of like diameter in the platform 2. The lower end of an upright split cylinder 30 rests on the mounting pad 18 concentrically of the aligned holes 26 and 28.

The split cylinder 30 has two parallel, outwardly projecting flanges 32 and 34 welded to the opposite edges thereof, the flanges extending from the top edge of the cylinder downwardly for about three-fourths the height thereof. The flange 34 has a threaded bore 36 therethrough that is aligned with a larger, unthreaded bore 38 in the flange 32. The bottom edge of the cylinder 30 opposite the flanges 32 and 34 is secured to the mounting pad 18 by a weld 40, the center of the weld 40 being disposed diametrically opposite the space between the confronting flanges 32 and 34, and the arc length of said weld being about 8 An adjustment screw 42 is provided for connecting the flanges 32 and 34, and includes a body portion 44 receivable through the enlarged bore 38, and from which extends a reduced diameter threaded portion 46 that is engageable in the threaded bore 36. The outer end of the body portion 44 has an enlarged head 48 thereon, to which a crosspin 50 is welded to aid in turning the screw. When the adjustment screw 42 is tightened the portions of the split cylinder 30 outside the weld 40 are moved radially inwardly, .and the inherent resiliency of said cylinder will effect movement in the opposite direction when said screw is subsequently loosened.

Received within the split cylinder 30 of the resistance unit'6 is a cylindrical rotor'52 having an axial bore 54 therethrough within which-is received the shaft 8, said shaft being secured to the-rotor by a weld 56 or other suitable means. The lower end 58 of the shaft 8 projects beyond the rotor 52 and is journaled within the aligned circular openings 26 and 28, whereby the rotor 52 is fixed against radial movements. The rotor 52 fits snugly within the cylinder 30 so that a friction resistance will be createdtherebetween when the rotor isturned by the shaft 8, whereby a resistance torque is placed on said shaft-The value of the resistance torque is easily adjusted by turning the adjustment screw 42 in the proper direction.

The center leg 12 of the handle 14 is hollow, and the upper end thereof is welded centrally to the cross bar 16. The upper end 10 of the shaft 8 is telescopically receivable within the lower end of the center leg 12, to which it is secured by a pin 60 passed through a diametric bore 62 in the leg 12 and a selected one of several vertically spaced diametric bores 64 in the shaft upper end 10. The height of the cross bar 16, as is easily seen, can be varied by inserting the pin 60 into anappropriate bore 64.

With the height of the cross bar 16 properly adjusted and the adjustment screw 42 turned to produce the desired degree of friction between the rotor 52 and the split cylinder 30, the subject stands on the platform 2 as shown in FIG. 1, with feet spread apart and with the hands grasping the opposite ends of the cross bar 16. The subject then twists the upper portion of his torso back and forth, thereby rotating the shaft 8 and the rotor 52. As the rotor is moved, friction between it and the inner surface of the cylinder 30 creates a resistance place a resistance torqueon the shaft 8, thereby creating a force against which the body muscles must work. It is readily seen that the result of effort by the user is to exercise the specific bodymuscles used to twist or rotate the torso.

The friction resistance unit 6 is simple and economical to construct, maintenance free, and easily adjusted. However, it is to be understood that other types of re sistance units capable of producing adjustable resistance torqu e might be used instead of the unit 6, for,example the torsion bar resistance unit indicated at 100 in FIGS. 4-6, used 'in connection with .a second embodiment 102 of the present rotary exerciser device.

Referring now to the embodiment of FIGS. 46, a platform 104 is shown therein that is similar to the platform 4 of the exerciser 2, except that such need not have a bearing opening centrally therein. The torsion bar resistance unit 100 is disposed centrallyon the plat form 104 in a vertical ,position, and includes a mounting pad 106 securedto the platform by bolts 108, the bolts 108 passing through bores 110 in the-pad106 and being threaded into bores 1l2 in the platform.

Disposed centrally on the mounting pad 106 is avertically disposed cylindrical housing 114, the lower end of said housing being secured to the pad 106 by a circumferential weld 116. The housing 114 has two vertical, diametrically opposed slots 118' out therein, extending from the lower end thereof to about one-half the height of the housing. Displaced 90 from the slots 118 is a vertical row of spaced bores 120, the purpose for which will be explained later.

Received within the cylindrical housing 114 is a rectangular torsion bar 122, which can be made of spring steel having torsion characteristics suitable for the exerciser device 102,.Slidably received on the bar 122 is a circular retainer collar 124, the collar having an external, diameter slightly less than the internal diameter of the housing 114, and having a central rectangular opening 126 therein for snugly receiving the bar 122 with a sliding fit. The retainer collar 124 has diametrically opposed rectangular lugs "128 thereon that slidingly fit within the diametrically opposed slots 118, and displaced 90 therefrom the collar has a radial bore 130 that is alignable with the bores 120 in the housing 114.

The retainer collar 124 is assembled into the slots 1 upper end thereof is being twisted, the cooperating lugs 128 and slots 118 holding the bars lower end against twisting movement, and the circular body of the collar 124 keeping the lower end of the bar centrally positioned in the housing 114. The collar 124 is held in a selected vertical position by a pin 132 passed through a selected one of the bores 120, and seated in the bore 130.

' The exerciser device 102 includes a T-shaped handle 134, having a horizontal cross bar 136 to which is centrally welded the upper end of a vertical center leg 138. Welded to the lower end of the handle center leg 138 is a retainer head 140. While the handle 134 is thus not shown to be vertically adjustable in height, it is to be understood that the center leg.138 thereof might be constructed of telescoping members to be adjustable in length, if such is desired, in a manner similar to the arrangement shown for the handle 14.

The retainer head 140 includes a circular bearing plate 142 of larger diameter than the external diameter of the housing 114, and which includes a flat lower surface 144 adapted to rest upon the flat upper end face 146 of the housing. Welded centrally to the lower face 144 of the bearing plate 142 is a circular anchor block 148 having an external diameter slightly'less than the internal diameter of the housing 1l4,"and'having a deep, diametric slot 150 therein with parallel sidewalls spaced apart a distance just slightly greater than the thickness of the upper end of the torsion bar 122. The lower end of the torsion bar 122 rests on the mounting pad 106, and the bar is of such lengththatthe upper end thereof is well seated in the diametric slot 150. It is to be understood'that the retainer head 140 might be made in one piece, if desired.

With the retainer head 140 seated on the housing 114 and engaged with the .torsion bar 122, the device 102 is ready for use. The subject stands on the platform 104 and grasps the oppsoite ends of the cross bar 136, just as in FIG. 1, and then twists his body to effect rotation of the handle 138. When such rotation occurs the torsion bar 122 is twisted over the length thereof between the anchor block 148 and the retainer collar 124, thereby generating resistance torque against which the body muscles can work. i

The value of such resistance torque is directly related tothe effective lengthofthe torsion bar 122, the effective' length being that portion of .the bar between the anchor block 148 and the retainer collar 124, This effective length can be varied by adjusting the height of theretainer collar 124, which is easily done by merely pulling the pin 13 2, sliding the collar to the next desired bore 120, andthen reinserting the pin. When a greater resistance torque is wanted the collar 124 is movedupwardly to shorten the effective length of the torsion bar 122, and vice-versa.

It is readily seen that the exerciser device 102 of FIGS. 4-8 is rugged, economical to construct, and easily adjustable. Thus, both embodiments of the invention satisfy the objects hereinabove set forth. Obviously, variations of the invention are possible.

What I claim is: i

l. A rotary motion exerciser device, comprising: a

portable-platform upon which a subject using the device stands; a vertically disposed resistance unit mounted centrally on said platform, and including a vertical shaft rotatable in eitherwdirection about the vertical axis thereof; a T-shaped handle, said handlei'neluding a straight, generally vertically disposed center leg aligned with the vertical axis of and connected at its lower end to said shaft of said resistance unit, and a generally horizontal straight cross bar attached to the upper end of said center leg; and means on said resistance unit for fixing said vertical shaft in a vertical orientation with respect to the platform so that said shaft cannot be moved out of said vertical orientation during the rotation of said shaft by said T-shaped handle by a person standing upon said platform and gripping and manipulating the opposite ends of said cross bar.

2. A rotary motion exerciser device as recited in claim 1, wherein said centerleg of said handle is adjustable in height above the platform. 7

3. A rotary motion exerciser device as'recited in claim 1, wherein said resistance unit is adjustable,

whereby the value of resistance torque generated against rotation of said handle can be adjusted.

4. A rotary motion exerciser device as recited in claim 3, wherein said resistance unit includes a friction resistance. a

5. A rotary motion exerciser device'as recited in claim 4,'wherein said friction resistance comprises: a vertically disposed split cylinder, a portion of the circumference of the lower end of said split cylinder away from said split being secured to said platform; a rotor received within said split cylinder, said shaft connected to the lower end of said center leg of said handle being secured to said rotor; and adjustable means for tightening said split cylinder about said rotor, whereby the inner surface of said split cylinder grips the peripheral surface of said rotor with a selected degree of force.

6. A rotary motion exerciser device as recited in claim 5, wherein said adjustable tightening means includes a pair of abutting flanges on said split cylinder, located on opposite sides of the split therein; and an adjustment screw engaged with said flanges.

7. A rotary motion exerciser device as recited in claim 5, wherein said shaft extends through and projects downwardly from said rotor, and wherein said projecting lower shaft end is journaled in said platform to thereby limit lateral shifting of said rotor.

8. A rotory motion exerciser device as recited in claim 3,.wherein said resistance unit utilizes a torsion bar to generate torque resistance. I

9. A rotary. motion exerciserdevice as recited 'in claim 8, wherein said shaft and said center leg of said T-shaped handle are integral, and wherein said resistance unit comprises: a vertical cylindrical housing secured at its lower end to said platform, and having at least one vertical slot therein; a retainer collar slidably received within said housing, said collar having a radial lug thereon slidably received in said vertical slot, and

having a central opening therein; a torsion bar received 10. A rotary motion exerciser device as recited in claim 9, wherein said means for selectively securing said retainer collar includes a pin, said collar having a radial bore therein to seat said pin, and said cylindricial housing having a plurality of vertically spaced bores therethrough to selectively receive said pin.

11. A rotary motion exerciser device as recited in claim 9, wherein said retainer head comprises: a bearing plate adapted to engage the upper end face of said cylindrical housing; and an anchor block having slot means therein conforming to the cross sectional configuration of said torsion bar, and adapted to receive the upper end portion of said bar.

Claims (11)

1. A rotary motion exerciser device, comprising: a portable platform upon which a subject using the device stands; a vertically disposed resistance unit mounted centrally on said platform, and including a vertical shaft rotatable in either direction about the vertical axis thereof; a T-shaped handle, said handle including a straight, generally vertically disposed center leg aligned with the vertical axis of and connected at its lower end to said shaft of said resistance unit, and a generally horizontal straight cross bar attached to the upper end of said center leg; and means on said resistance unit for fixing said vertical shaft in a vertical orientation with respect to the platform so that said shaft cannot be moved out of said vertical orientation during the rotation of said shaft by said T-shaped handle by a person standing upon said platform and gripping and manipulating the opposite ends of said cross bar.
2. A rotary motion exerciser device as recited in claim 1, wherein said center leg of said handle is adjustable in height above the platform.
3. A rotary motion exerciser device as recited in claim 1, wherein said resistance unit is adjustable, whereby the value of resistance torque generated against rotation of said handle can be adjusted.
4. A rotary motion exerciser device as recited in claim 3, wherein said resistance unit includes a friction resistance.
5. A rotary motion exerciser device as recited in claim 4, wherein said friction resistance comprises: a vertically disposed split cylinder, a portion of the circumference of the lower end of said split cylinder away from said split being secured to said platform; a rotor received within said split cylinder, said shaft connected to the lower end of said center leg of said handle being secured to said rotor; and adjustable means for tightening said split cylinder about said rotor, whereby the inner surface of said split cylinder grips the peripheral surface of said rotor with a selected degree of force.
6. A rotary motion exerciser device as recited in claim 5, wherein said adjustable tightening means includes a pair of abutting flanges on said split cylinder, located on opposite sides of the split therein; and an adjustment screw engaged with said flanges.
7. A rotary motion exerciser device as recited in claim 5, wherein said shaft extends through and projects downwardly from said rotor, and wherein said projecting lower shaft end is journaled in said platform to thereby limit lateral shifting of said rotor.
8. A rotory motion exerciser device as recited in claim 3, wherein said resistance unit utilizes a torsion bar to generate torque resistance.
9. A rotary motion exerciser device as recited in claim 8, wherein said shaft and said center leg of said T-shaped handle are integral, and wherein said resistance unit comprises: a vertical cylindrical housing secured at its lower end to said platform, and having at least one vertical slot therein; a retainer collar slidably received within said housing, said collar having a radial lug thereon slidably received in said vertical slot, and having a central opening therein; a torsion bar received within said housing and passing through said central opening in said collar, said torsion bar having a non-circular cross section, and said central opening conforming to said cross section whereby to prevent relative rotation between said collar and said bar; means for selectively securing said retainer collar at different heights within said vertical housing; and a retainer head engaged with the upper end of said torsion bar, said retainer head being secured to the lower end of said shaft.
10. A rotary motion exerciser device as recited in claim 9, wherein said means for selectively securing said retainer collar includes a pin, said collar having a radial bore therein to seat said pin, and said cylindricial housing having a plurality of vertically spaced bores therethrough to selectively receive said pin.
11. A rotary motion exerciser device as recited in claim 9, wherein said retainer head comprises: a bearing plate adapted to engage the upper end face of said cylindrical housing; and an anchor block having slot means therein conforming to the cross sectional configuration of said torsion bar, and adapted to receive the upper end portion of said bar.
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Cited By (36)

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US3982756A (en) * 1975-04-28 1976-09-28 Carl Hersey Sit-n-cycle
US3982757A (en) * 1975-04-17 1976-09-28 Mcdonnell Richard J Torsion type arm exercising apparatus
US4249727A (en) * 1977-09-15 1981-02-10 Etablissement Ariabel Friction type gymnastic apparatus
US4402505A (en) * 1981-08-05 1983-09-06 Young Sidney P Trunk exercising device
US4494662A (en) * 1983-03-04 1985-01-22 Clymer Ronald S Mounted spring device for resisting flexing
AT377182B (en) * 1981-10-23 1985-02-25 Von Othegraven Achim Gymnastikgeraet
EP0186928A1 (en) * 1984-12-18 1986-07-09 Mandhy Products B.V. Apparatus for exercising the arm muscles
US5002272A (en) * 1987-07-29 1991-03-26 Hanover Holdings Pty. Ltd. Resilient swivel exerciser
US5052684A (en) * 1986-09-10 1991-10-01 Senoh Kabushiki Kaisha Apparatus for training a waist portion of a human body
GB2262051A (en) * 1991-12-06 1993-06-09 Raymond Richard Mullard Exercise device
US5433690A (en) * 1993-06-11 1995-07-18 Gilman; Stewart B. N. Side jump and body twist exercising apparatus
US6022303A (en) * 1997-03-10 2000-02-08 Ab-Do'er Llc Abdominal exercise device
US6248047B1 (en) 1998-01-13 2001-06-19 John S. Abdo Exercise device
US6773378B2 (en) 2000-12-14 2004-08-10 Steven O. Ross Exercise device with true pivot point
US20070072752A1 (en) * 2005-09-29 2007-03-29 Koch Kregg A Exercise Apparatus
US7223215B2 (en) 2000-12-14 2007-05-29 Bastyr Charles A Exercise device with true pivot point
US20070197355A1 (en) * 2006-02-22 2007-08-23 Brown & Company Of Pensacola, Inc. Aero hydraulic exercise and physical therapy equipment and method
US20070249434A1 (en) * 2006-04-25 2007-10-25 Starr Keith E Training Device for Gymnasium
US20080234116A1 (en) * 2007-03-23 2008-09-25 Paula Elzerman Exercise system and method for its use
US20090054214A1 (en) * 2005-09-29 2009-02-26 Michael Shannon Kadar Exercise apparatus
US7559881B1 (en) * 2008-03-11 2009-07-14 Roraff Jack J Exercise assembly for conditioning a user's body and associated method
US20090280968A1 (en) * 2005-08-31 2009-11-12 Ross John Weir Abdominal muscle training device
US20090286659A1 (en) * 2006-02-22 2009-11-19 Brown & Company Of Pensacola, Inc. Aero hydraulic exercise and physical therapy equipment and method
US20100016135A1 (en) * 2008-06-10 2010-01-21 Angela Sales Exercise device for abdominal and other core muscles
US8974354B1 (en) * 2012-01-04 2015-03-10 Brunswick Corporation Landmine apparatuses
US20170173383A1 (en) * 2015-12-18 2017-06-22 Wei-Teh Ho Portable abs exercise device
US10188890B2 (en) 2013-12-26 2019-01-29 Icon Health & Fitness, Inc. Magnetic resistance mechanism in a cable machine
US10232211B1 (en) 2015-07-16 2019-03-19 Kregg Alan Koch Exercise apparatus
US10252109B2 (en) 2016-05-13 2019-04-09 Icon Health & Fitness, Inc. Weight platform treadmill
US10279212B2 (en) 2013-03-14 2019-05-07 Icon Health & Fitness, Inc. Strength training apparatus with flywheel and related methods
US10293211B2 (en) 2016-03-18 2019-05-21 Icon Health & Fitness, Inc. Coordinated weight selection
US10413776B2 (en) * 2015-11-18 2019-09-17 Edward Ronald Lennon Exercise device
US10426989B2 (en) 2014-06-09 2019-10-01 Icon Health & Fitness, Inc. Cable system incorporated into a treadmill
GB2572593A (en) * 2018-04-04 2019-10-09 Revoroute Ltd Exercise and gaming apparatus
US10441840B2 (en) 2016-03-18 2019-10-15 Icon Health & Fitness, Inc. Collapsible strength exercise machine
US10449416B2 (en) 2015-08-26 2019-10-22 Icon Health & Fitness, Inc. Strength exercise mechanisms

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US3515384A (en) * 1968-07-23 1970-06-02 David D Alexander Hand operated friction type exercising device
US3640525A (en) * 1969-09-08 1972-02-08 Richard I Proctor Frictional resistant-type exercise machine with waist-level-mounted oscillatable handgrips

Cited By (48)

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US3982757A (en) * 1975-04-17 1976-09-28 Mcdonnell Richard J Torsion type arm exercising apparatus
US3982756A (en) * 1975-04-28 1976-09-28 Carl Hersey Sit-n-cycle
US4249727A (en) * 1977-09-15 1981-02-10 Etablissement Ariabel Friction type gymnastic apparatus
US4402505A (en) * 1981-08-05 1983-09-06 Young Sidney P Trunk exercising device
AT377182B (en) * 1981-10-23 1985-02-25 Von Othegraven Achim Gymnastikgeraet
US4494662A (en) * 1983-03-04 1985-01-22 Clymer Ronald S Mounted spring device for resisting flexing
US4720100A (en) * 1984-12-18 1988-01-19 Mandhy Products B.V. Apparatus for exercising the arm muscles
EP0186928A1 (en) * 1984-12-18 1986-07-09 Mandhy Products B.V. Apparatus for exercising the arm muscles
US5052684A (en) * 1986-09-10 1991-10-01 Senoh Kabushiki Kaisha Apparatus for training a waist portion of a human body
US5002272A (en) * 1987-07-29 1991-03-26 Hanover Holdings Pty. Ltd. Resilient swivel exerciser
GB2262051A (en) * 1991-12-06 1993-06-09 Raymond Richard Mullard Exercise device
GB2262051B (en) * 1991-12-06 1994-12-21 Raymond Richard Mullard Exercise device
US5433690A (en) * 1993-06-11 1995-07-18 Gilman; Stewart B. N. Side jump and body twist exercising apparatus
US6022303A (en) * 1997-03-10 2000-02-08 Ab-Do'er Llc Abdominal exercise device
US6248047B1 (en) 1998-01-13 2001-06-19 John S. Abdo Exercise device
US6773378B2 (en) 2000-12-14 2004-08-10 Steven O. Ross Exercise device with true pivot point
US7223215B2 (en) 2000-12-14 2007-05-29 Bastyr Charles A Exercise device with true pivot point
US7874969B2 (en) * 2005-08-31 2011-01-25 Progressive Sports Technologies, Limited Abdominal muscle training device
US20090280968A1 (en) * 2005-08-31 2009-11-12 Ross John Weir Abdominal muscle training device
US7704199B2 (en) 2005-09-29 2010-04-27 Core Stix Fitness, Llc Exercise apparatus
WO2007040993A3 (en) * 2005-09-29 2007-11-22 Michael Shannon Kadar Exercise apparatus
US8137249B2 (en) 2005-09-29 2012-03-20 Core Stix Fitness Llc Exercise apparatus
US20090054214A1 (en) * 2005-09-29 2009-02-26 Michael Shannon Kadar Exercise apparatus
US8500612B2 (en) 2005-09-29 2013-08-06 Core Stix Fitness Llc Exercise apparatus
US20070072752A1 (en) * 2005-09-29 2007-03-29 Koch Kregg A Exercise Apparatus
US20100273615A1 (en) * 2005-09-29 2010-10-28 Kregg Alan Koch Exercise apparatus
US7878956B2 (en) 2005-09-29 2011-02-01 Core Stix Fitness, Llc Exercise apparatus
US20090286659A1 (en) * 2006-02-22 2009-11-19 Brown & Company Of Pensacola, Inc. Aero hydraulic exercise and physical therapy equipment and method
US20070197355A1 (en) * 2006-02-22 2007-08-23 Brown & Company Of Pensacola, Inc. Aero hydraulic exercise and physical therapy equipment and method
US20070249434A1 (en) * 2006-04-25 2007-10-25 Starr Keith E Training Device for Gymnasium
US20080234116A1 (en) * 2007-03-23 2008-09-25 Paula Elzerman Exercise system and method for its use
US7559881B1 (en) * 2008-03-11 2009-07-14 Roraff Jack J Exercise assembly for conditioning a user's body and associated method
US20100016135A1 (en) * 2008-06-10 2010-01-21 Angela Sales Exercise device for abdominal and other core muscles
US20110319236A1 (en) * 2008-06-10 2011-12-29 Angela Sales Exercise device for abdominal and other core muscles
US8317668B2 (en) * 2008-06-10 2012-11-27 Angela Sales Exercise device for abdominal and other core muscles
US8974354B1 (en) * 2012-01-04 2015-03-10 Brunswick Corporation Landmine apparatuses
US10279212B2 (en) 2013-03-14 2019-05-07 Icon Health & Fitness, Inc. Strength training apparatus with flywheel and related methods
US10188890B2 (en) 2013-12-26 2019-01-29 Icon Health & Fitness, Inc. Magnetic resistance mechanism in a cable machine
US10426989B2 (en) 2014-06-09 2019-10-01 Icon Health & Fitness, Inc. Cable system incorporated into a treadmill
US10232211B1 (en) 2015-07-16 2019-03-19 Kregg Alan Koch Exercise apparatus
US10449416B2 (en) 2015-08-26 2019-10-22 Icon Health & Fitness, Inc. Strength exercise mechanisms
US10413776B2 (en) * 2015-11-18 2019-09-17 Edward Ronald Lennon Exercise device
US20170173383A1 (en) * 2015-12-18 2017-06-22 Wei-Teh Ho Portable abs exercise device
US10004943B2 (en) * 2015-12-18 2018-06-26 Wei-Teh Ho Portable Abs exercise device
US10441840B2 (en) 2016-03-18 2019-10-15 Icon Health & Fitness, Inc. Collapsible strength exercise machine
US10293211B2 (en) 2016-03-18 2019-05-21 Icon Health & Fitness, Inc. Coordinated weight selection
US10252109B2 (en) 2016-05-13 2019-04-09 Icon Health & Fitness, Inc. Weight platform treadmill
GB2572593A (en) * 2018-04-04 2019-10-09 Revoroute Ltd Exercise and gaming apparatus

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