Hydraulic torque reaction wrist and arm exerciser

摘要

A hand-held wrist and arm exerciser employing rotary motion and including a resistance torque device with first and second relatively rotatable units mounting hand grips. The units are spaced substantially equidistant between the hand grips. Resistance torque is developed within the device accompanying rotational effort applied through the hand grips, such torque being determined by the restriction of flow of hydraulic fluid between compartments of an annular chamber, increasing in proportion to turning effort applied to the device and being adjustable by externally operable valve mechanism for changing the size of the flow restriction. One of the units has a mechanism for restricting fluid movement therefrom.