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Publication numberUS3807729 A
Publication typeGrant
Publication dateApr 30, 1974
Filing dateDec 18, 1972
Priority dateDec 22, 1971
Publication numberUS 3807729 A, US 3807729A, US-A-3807729, US3807729 A, US3807729A
InventorsK Sigma
Original AssigneeSanyei Merchandise Co Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hand muscle developing apparatus with counter enclosed in housing
US 3807729 A
Abstract
A hand muscle developing apparatus comprising a pair of arms, one of which is normally urged in the opposite direction to the other and a counter indicating the number of times the one arm is moved. One arm is fixed to a cylindrical housing and the other arm extends through, and is guided by, a slot in a peripheral wall of the housing.
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Description  (OCR text may contain errors)

United States Patent [191 Sigma [451 Apr. 30, 1974 HAND MUSCLE DEVELOPING APPARATUS WITH COUNTER ENCLOSED IN HOUSING [75] Inventor:

[73] Assignee: Sanyei Merchandise Co., Ltd.,

Tokyo, Japan 22 Filed: Dec. 18, 1972 211 App]. No.: 315,861

Kenii Sigma, Kashiwa, Japan [30] Foreign Application Priority'Data Dec. 22, 1971 Japan 46-l2132l[U] [52] US. Cl 272/68, 235/121, 272/DIG. 5 [51] Int. Cl A63b 21/30 [58] Field of Search 272/67, 79 B, 83 R, 83 A, 272/68, DIG. 5; 73/379, 380, 381; 235/1 C, Y 95 R, 121

[56] References Cited UNITED STATES PATENTS 2,806,699 9/1957 I Spooner 272/83 R 619,529 2/1899 Andrews 235/121 3,250,466 5/1966 Tomlinson 235/95 R 433,117 7/1890 Clark 235/121 467,905 2/1892 Abmeyer 235/121 1,701,445 2/1929 Dayton 235/121 X FOREIGN PATENTS OR APPLICATIONS 10,870 7/1915 Great Britain 73/381 433,319 8/1935 Great Britain 272/68 Primary Examiner- Richard C. Pinkham Assistant Examiner- R. T. Stouffer 7] ABSTRACT A hand muscle developing apparatus comprising a pair of arms, one of which is normally urged in the 0pposite direction to the other and a counter indicating the number of times the one arm is moved. One arm is fixed to a cylindrical housing and the other arm extends through, and is guided by, a slot in a peripheral wall of the housing.

4 Claims, 3 Drawing Figures m m nm 30 1914 3.807.729

HAND MUSCLE DEVELOPING APPARATUS WITH COUNTER ENCLOSED IN HOUSING I BACKGROUND OF THE INVENTION This invention relates to a hand muscle developing apparatus and and more particularly to a hand muscle developing apparatus capable of easily indicating the number of hand grips.

SUMMARY OF THE INVENTION A hand muscle developing apparatus according to this invention comprises a pair of arms, at least one of which is fixed to a housing and the other of which movable relative to the first arm and which is normally urged in the opposite direction to the first arm. The movable arm extends through and is guided by a slot in the housing. A counter is provided for indicating the number of times the movable arm is moved. This hand muscle developing apparatus has the advantage that the effect of the twisting moment on the arms is reduced and that a user easily finds the'number of times the movable arm is moved, namely the number of his 'hand grips, without remembering said number by himself. As used herein, the term grips is used to denote the squeezing or moving together of the arms by the operator of the device.

BRIEF DESCRIPTION OF THE DRAWING The present invention can be more fully understood from the following detailed description when taken in connection with the accompanying drawings, in which:

DETAILED DESCRIPTION OF THE INVENTION Referring toFIG. 1, the hand muscle developing apparatus of this invention includes a fiat cylindrical housing 1 and a V-shaped spring 2 received in the housing 1. The sprin'g'2 has a coil section 3 fixed to the housing 1, and-a pair of extensions 4'and 5 which .ex-

tend from both sides of the coil section 3 and are arranged at a progressively broadening interval (i.e. spacing) toward the outside. The extensions 4 and 5 protrude from the peripheral wall of the housing 1 and are respectively provided at the end with handles 6 and 7. The extensions 4 and 5 and handles 6 and 7 are coupled together to form a pair of arms 8 and 9. One arm 8 is fixed to the housing l and the other arm 9 is made rockable (i.e., movable) in the direction of the indicated arrow I through a slot 30 bored in the side wall of the housing. On the upper surface of the housing 1 are mounted a graduated disc 28 hearing divisions of graduation and a needle 29 rotatable over said disc 28 along a circular graduated scale. The housing 1 cona plurality of projections 13 provided on both upper and under sides respectively. These projections 13 are fitted into an elongate guide slot 14 formed in the casing 11 so as to allow the bar 12 to be guided therethrough in the direction of the indicated arrow II. A tension spring 15 is engaged at one end with the bar 12 and casing 11 normally to urge the bar 12 to the position of FIG. 2. At the other end of the bar 12 is integrally-formed a pawl 16, which engages a ratchet wheel tains the later described drive means 10 (FIG. 1) for causing the needle 29 to rotate in accordance with the movements of the arm 9.

Referring to FIGS. 2 and 3, the drive means 10 is r ceived in a casing 11 (FIGS. 1 and 2) fixed to the inner wall of the housing 1. From a slot 12a (FIG. 2) bored in the side wall of the casingll protrudes a bar l2 pressed by the arm 9 when it is gripped. The bar 12 has 17 rotatably supported by the casing 11 so as to rotate said ratchet wheel 17 only in one direction. Further, a stop 18 abuts against the ratchet wheel 17 to prevent its rotation in the opposite direction.

The ratchet wheel 17 has a cog wheel 19 concentrically fitted therewith. Said cog wheel 19 engages an interrnediate gear 20 which is also provided with another cog gear 21. All these gears constitute a reduction gear system. The latter cog gear 21 engages a master gear 22, which is rotatably fitted to a rotary shaft 23 (FIG. 3) pivoted to the casing 1 l. The upper end of said shaft 23 projects outside of the housing 1. Concentrically with the rotary shaft 23 is fixed a spring washer 24, which is fitted with a plurality of elastic arms 25 extending radially from the axial center for frictional engagement with the underside of the master gear 22. The master gear 22 and rotary shaft 23 frictionally engage each other normally to make a joint rotation. The upper side of the master gear 22 and'the underside of the spring washer 24 are contacted by rings 26 and 27 fixed to the rotary shaft 23. The top of the rotary shaft 23 is fitted with the needle 29 which is made rotatable therewith over the graduated disc 28. When a user grips the handles 6 and 7 of the arms 8 and 9 to move the arm 9 in the direction of the indicated arrow I (FIG. 2), then the arm 9 presses one end of the bar 12 to move it in the direction of the indicated arrow II against the force of the tension spring 15. Since, at this time, the ratchet wheel 17 is prevented from rotation by the stop 18, the pawl 16 jumps over one toothof the ratchet wheel 17. When the user loosens his grip to cause the arm 9 to be retracted by the coil 3 in the opposite direction to that of the arrow I, said bar 12 is returned by the tension spring 15. At this time, the pawl 16 rotates the ratchet wheel 17 by one tooth. As a result, the master gear 22 is rotated through the gears 19, 20 and 21, causing the needle 29 to rotate by one division of graduation. Thus, each timethe user grips the arms 8 and 9, the needle 29 rotates by one division of the scale, recording the number of the users grips.

The return of the needle 29 to its original position has only to be effected directly by hand from outside of the housing 1. Since, as described above, the master gear 22 and rotary shaft 23 frictionally contact each other through the spring washer 24, the radial arms 25 of the spring washer 24 slide on the underside of the master gear 22 even when it does not rotate. Thus the washer 24 acts as a clutch, and the needle 29, when forcefully moved by hand for return, makes a rotation independently of the master gear 22.

What is claimed is:

1. A hand muscle developing apparatus comprising:

a cylindrical housing having a slot in a peripheral wall thereof;

a pair of grip arms each having one end inserted in the housing and the other end projecting from said gripped;

means for urging said other arm away from said one arm, said urging means being fixed in the housing and connecting one end of the arms to each other;

drive means disposed in the housing and operated by said other arm; and

a counter driven by said drive means to indicate the number of times the arms are gripped;

said drive means including a bar movable in the lengthwise direction by said other arm when the arms are gripped; a guide for guiding the movement of said bar; a spring for retracting said bar to its original position; a pawl fixed to said bar; a ratchet wheel rotated by said pawl when said bar is retracted by said spring; and a transmission mechanism connecting said ratchet wheel to said counter to operate said counter, said transmission mechanism including a reduction gear system coupled to said rachet wheel, said gear system having a plurality of spur gear wheels, and a master spur gear wheel engaged with said gear system, said master wheel having a rotary shaft penetrating the center thereof and one end wall of the cylindrical housing to extend outside said housing; and

said counter including a rotating needle fixed to that portion of said rotary shaft which extends outside said housing so as to rotate over the outer surface of said end wall; and a graduated disk mounted on said outer surface of said end wall.

2. The hand muscle developing apparatus according to claim 1 including a clutch member for connecting said master gear to said rotary shaft.

3. The hand muscle developing apparatus according to claim 2 wherein said clutch member comprises a spring washer concentrically fixed to said rotary shaft and provided with a plurality of radially extending elastic arms frictionally abutting against the underside of said master gear.

4. The hand muscle developing apparatus according to claim 3 wherein said urging means comprises a coil spring, and said grip arms include two extensions extending from said coil spring with a progressively broadening spacing therebetween, and handles fixed to the outer ends of said extensions.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US433117 *Nov 15, 1889Jul 29, 1890F Oneclark
US467905 *Sep 15, 1891Feb 2, 1892 Meyer
US619529 *Mar 4, 1898Feb 14, 1899 Samuel w
US1701445 *Aug 10, 1927Feb 5, 1929James M DaytonIndicating and counting mechanism with compensator
US2806699 *Dec 28, 1955Sep 17, 1957Charles H SpoonerExercising device
US3250466 *Apr 22, 1965May 10, 1966Norvin P TomlinsonGolf yardage counter
GB433319A * Title not available
GB191410870A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4181124 *Jun 2, 1977Jan 1, 1980Joseph PauletichTherapeutic imploder
US4199143 *Jan 27, 1978Apr 22, 1980Bally Manufacturing CorporationPinball flipper
US4262898 *Jul 31, 1979Apr 21, 1981Lee Haa WHand exerciser having a counter
US4280696 *May 25, 1979Jul 28, 1981Yoav RamonJaw and facial muscle exerciser
US4513962 *Jul 10, 1983Apr 30, 1985Robson George ESpring type hand grip exerciser
US4558864 *Jun 13, 1984Dec 17, 1985Medwedeff Marion CHandgrip exercising, computer game controller
US4726580 *Dec 4, 1986Feb 23, 1988Stanley BatisteExercise apparatus
US5072927 *Dec 20, 1990Dec 17, 1991Santos James PHand exercise device
US5096187 *Mar 4, 1991Mar 17, 1992Marples James HExercise apparatus
US5222926 *Jan 7, 1992Jun 29, 1993Eggen Harald IHand exercise device
US5484355 *Oct 1, 1993Jan 16, 1996Smith & Nephew Roylan, Inc.System for therapeutic exercise and evaluation
US6026684 *Jul 17, 1998Feb 22, 2000Haemonetics CorporationActive donor hand gripper for use in a blood collection apparatus
US6537075 *Jan 11, 2000Mar 25, 2003Francisco J. Valero-CuevasDevice for developing and measuring grasping force and grasping dexterity
US7789815 *Apr 11, 2007Sep 7, 2010Tae Jin AnChest expander
EP0469363A1 *Jul 12, 1991Feb 5, 1992Whatnot, Inc.Wrist exercise device
Classifications
U.S. Classification482/49, 235/121
International ClassificationA63B23/035, A63B21/02, A63B21/045, A63B23/12
Cooperative ClassificationA63B21/0455, A63B23/12, A63B21/023
European ClassificationA63B21/045C