Exercise devices – Hand – wrist – or finger – Involving wrist rotation
Patent
1997-05-01
1998-07-07
Reichard, Lynne A.
Exercise devices
Hand, wrist, or finger
Involving wrist rotation
482 45, A63B 2314
Patent
active
057760349
ABSTRACT:
A wrist exerciser has a pair of coaxially mounted hand grip bodies. The hand grip bodies can be counter-rotated against a resistance to exercise the muscles in a user's forearms. A friction disk is sandwiched between the two hand grip bodies with a friction surface on one of the bodies bearing against the friction disk. The two hand grip bodies are biased toward each other to clamp the friction disk. The amount of bias force can be varied to set the amount of resistance to the rotation of the hand grip bodies relative to each other. The exerciser includes a spring connected to a member which is slidably mounted in a bore within one of the hand grip bodies. The member is prevented from rotating in the bore. The position of the member can be adjusted by turning an adjustment knob which is threadedly engaged with a threaded rod extending from the member. The bearing is located at one end of the spring. A thrust bearing between the adjustment knob and the hand grip body makes the adjustment knob easy to turn. The bias mechanism of the invention allows the resistance to rotation of the two hand grip bodies to be easily and accurately set. The adjustment of the biasing mechanism is not susceptible to being changed as the device is used. The invention may be used to provide an adjustable drag in other types of exercise equipment and other applications where an adjustable drag is desirable.
REFERENCES:
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patent: 4643417 (1987-02-01), Nieman
patent: 4838542 (1989-06-01), Wilkinson
patent: 5425690 (1995-06-01), Chang
patent: 5507377 (1996-04-01), Lindsay et al.
Pro 4 Arm Ltd.
Reichard Lynne A.
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