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US 5,209,714 AGranted
Automatic force generating and control system
AssigneeWalker Fitness Systems, Inc.
InventorsRobert L. Sainte, Steven E. Sarns, Steven R. Frank
Life of this patent
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AssigneeWalker Fitness Systems, Inc.
InventorsRobert L. Sainte, Steven E. Sarns, Steven R. Frank
Estimating the term…
An automatic force generating and control system that automatically sets exercise forces in accordance with user programmed criteria and is capable of providing pressurized flow to both ends of the arm hydraulics and leg exerciser hydraulics. Anticavitation is provided during idling, pressurized flow and when the user is successfully overcoming the pressurized flow. In the preferred embodiment, pressure is regulated by two proportional pressure relief valves which set the pilot pressure of the control valves and switching elements which direct the pressurized flow to the hydraulics. In an alternate embodiment pressure and flow are regulated by a bi-directional pump through the current and voltage sent to the pump by the controls. In a third embodiment the pressure is regulated by a proportional pressure relief valve which is connected in parallel to the ends of either the arm cylinders and to a uni-directional pump. In the alternate embodiments anticavitation is provided by a double pilot operated check valve.
A method of providing resistance to movement of an exercise arm, comprising the steps of:
A method of providing resistance to a movement means, comprising the steps of:
A method of providing resistance to movement of a plurality of exercise arms, comprising the steps of
Dependencies are inferred from the claim text.