Exercise devices – Hand – wrist – or finger – Involving wrist rotation
Patent
1993-06-30
1994-11-15
Apley, Richard J.
Exercise devices
Hand, wrist, or finger
Involving wrist rotation
482118, A63B 2314
Patent
active
053643240
ABSTRACT:
Disclosed is an exercise device for use in developing and toning hand, arm, wrist and upper body muscles. The device defines a frictional rotation exercise stick which includes a mounting bar upon which two handgrip elements are rotatably mounted. Located between these two handgrip elements is a center stop collar to prevent one of the handgrip elements from being pushed off of one end of the mounting bar when an inwardly directed force is exerted on the other handgrip element. A cylindrical weight is screwthreaded onto each end of the mounting bar and end stop collars are disposed between these weights and the handgrip elements. Compression bias and friction elements are provided between the end stop collars and the handgrip elements to provide an increase in rotational resistance of the handgrip elements in response to a tightening of the cylindrical weights against the stop collars while retaining a smoothness of operation. The relationship between the handgrip elements, the compression bias means, the end stop collars, the center stop collar and the mounting bar reduces the tendency for rotation of the handgrip elements to be transferred to the cylindrical weights thus preventing a backing off of the compression bias applied. In addition, this structure provides an exercise device which features variable tension resistance and smoothness of operation which promotes efficient exercise.
REFERENCES:
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patent: 4337937 (1982-07-01), Lopez
patent: 4504164 (1985-03-01), Bien
patent: 4830361 (1989-05-01), Hoffman
patent: 5244442 (1993-09-01), Schill
Apley Richard J.
Mollo Jeanne M.
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