Patent ID: 7569003

Claim:
Exercise apparatus comprising: first and second spaced parallel bars; a double-acting sealed cylinder having first and second ends; the first end being closed and the second end having an opening with a seal for permitting sliding of a ram therethrough; the first end of the cylinder connected centrally on the first bar; a ram having a piston mounted in the cylinder and having a piston rod connected at a first end to the piston, the piston rod extending through the second end of the cylinder and having a second end connected centrally on the second bar; resistance provided between the piston and the first and second ends of the cylinder for resisting movement of the piston and piston rod toward the first end and toward the second end with respect to the cylinder for moving the ram and increasing force in a fluid medium in one end of a cylinder and forcing fluid from the one end of the cylinder to the other end; a passage between the ends of the cylinder and a restriction in the passage for controlling flow of fluid between opposite ends of the cylinder; gripping handles, relatively moving handles away from and toward each other and directly forcing a ram directly connected to one of the handles into and out of a hydraulic or pneumatic cylinder directly connected to the other one of the handles, and moving hydraulic or pneumatic fluid from one end to the other end of the cylinder with the relative movement of the handles and of the ram and the cylinder; a grip provided on one of the bars for gripping the one bar with one or two hands of a user; and positions provided on another one of the bars for holding the other bar with one or both hands or with body members.