초록 ▼

An exercising apparatus utilizes an inclinable table over which is pivotably secured an arm. The arm is pivotably secured to the free end of a piston whose housing is otherwise pivotably secured to a frame to which the arm is secured. The cylinder has the uppermost chamber filled with oil and couple

An exercising apparatus utilizes an inclinable table over which is pivotably secured an arm. The arm is pivotably secured to the free end of a piston whose housing is otherwise pivotably secured to a frame to which the arm is secured. The cylinder has the uppermost chamber filled with oil and coupled to an oil receiving vented chamber by way of two parallel pads, each containing a check valve operable in opposed directions. Each path also contains a manually operable valve, one of which is disposed hydraulically in parallel with a valve containing selectably different size orifices. The lower chamber of the cylinder contains an elastic membrane which segregates the lower chamber into two separate compartments, the upper of which is filled with oil and the lower of which contains air. The operation of the cylinder simulates different weights and the effect of gravity thereon as if a user were actually lifting a barbell.

대표청구항 ▼

An exercising apparatus comprising an arm, a post, means to pivotably secure one end of said arm to one end of said post, a base, means to secure the other end of said post to said base, a hydraulic cylinder, means to secure one end of said hydraulic cylinder to said base, means to pivotably secure

An exercising apparatus comprising an arm, a post, means to pivotably secure one end of said arm to one end of said post, a base, means to secure the other end of said post to said base, a hydraulic cylinder, means to secure one end of said hydraulic cylinder to said base, means to pivotably secure the piston of said hydraulic cylnder to said arm, said hydraulic cylinder having a single port therein, said single port communicating with a first oil containing chamber within said cylinder, a pipe, said pipe communicating with said port, an oil receiving tank, said pipe communicating with said oil receiving tank, a second oil receiving chamber disposed within said cylinder, said first and said second oil receiving chambers hydraulically separated by a slidable piston portion of said cylinder, a rubber-like membrane, said rubber-like membrane disposed within said cylinder, a closed air receiving chamber disposed in said cylinder for containing air therewithin, the interior portions of said air receiving chamber separated from the interior portions of said second oil receiving chamber by said rubber membrane, means to selectively positively pressurize and impose a partial vacuum of said air at a fixed selected air or vacuum pressure within said air receiving chamber only when said slidable piston portion is disposed in a stationary position and at varying decreasing positive pressure levels and increasing partial vacuum in accordance with the position of said slidable piston portion along the length of said cylinder intermediate said stationary position and said pipe, means to independently control the rate of flow of hydraulic fluid from said first oil receiving chamber into said tank and from said tank to said first oil receiving chamber, said means to control including a multi-orifice plate, said multi-orifice plate having a plurality of different size orifices therein, a pair of plate contacting blocks, said pair of blocks selectively engaging one of said orifices, whereby the rate of flow of said hydraulic fluid from said first oil receiving chamber into said tank may be increased when the size of said orifice is increased.