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An exercising device comprising a frame, actuating means, and a double acting hydraulic cylinder used therewith. The hydraulic cylinder includes a container having first and second chambers and passageways for placing the chambers in fluid communication with one another. A piston is slideably mounte

An exercising device comprising a frame, actuating means, and a double acting hydraulic cylinder used therewith. The hydraulic cylinder includes a container having first and second chambers and passageways for placing the chambers in fluid communication with one another. A piston is slideably mounted within the first chamber and valve means are mounted with the container for preventing fluid communication into the first chamber when the piston is moved in a first direction and for preventing fluid communication around the piston when the piston is moved in a second direction. A piston rod extends into the container for moving the piston in response to movement of the actuating means. A control means governs the fluid flow through a selected passageway from the first to the second chamber to regulate the amount of force necessary to move the actuating means during exercise of a portion of the body.

대표청구항 ▼

An exercising device, comprising: a frame; actuating means mounted with the frame for movement by a portion of a human body; a double acting cylinder connected to the frame for resisting movement of said actuating means, said cylinder including a container having first and second chambers for suppor

An exercising device, comprising: a frame; actuating means mounted with the frame for movement by a portion of a human body; a double acting cylinder connected to the frame for resisting movement of said actuating means, said cylinder including a container having first and second chambers for supporting a fluid disposed therein and a passageway for placing the first and second chambers in fluid communication with one another; control means for regulating the flow of fluid through said passageway, said control means having a plurality of orifices of varying sizes formed therein; and means to selectively position the orifices in communication with the passageway to control resistance to fluid flow to vary the magnitude of force required to move the actuating means.