초록 ▼

A fluid spring assembly. The spring assembly preferably includes a body that slidably supports a piston that is attached to a piston rod. The piston serves to define a fluid chamber within the body that is charged with a pressurized fluid medium. The piston is retained within the body by a rigid ret

A fluid spring assembly. The spring assembly preferably includes a body that slidably supports a piston that is attached to a piston rod. The piston serves to define a fluid chamber within the body that is charged with a pressurized fluid medium. The piston is retained within the body by a rigid retainer member. A biasing member is provided between the retaining member and the piston for resisting the force generated by the fluid medium within the fluid chamber.

대표청구항 ▼

[ Having described the invention, the following is claimed:] [1.]1. A press assembly operable from an open condition to a closed condition to deform a workpiece and operable from the closed condition to the open condition to facilitate removal of the workpiece from said press assembly, said press as

[ Having described the invention, the following is claimed:] [1.]1. A press assembly operable from an open condition to a closed condition to deform a workpiece and operable from the closed condition to the open condition to facilitate removal of the workpiece from said press assembly, said press assembly comprising a first member for engaging a first side of the workpiece, a second member for engaging a second side of the workpiece, drive means for moving said first member toward said second member during operation of said press assembly from the open condition to the closed condition and for moving said first member away from said second member during operation of said press assembly from the closed condition to the open condition, and a cushion assembly operable from an extended condition toward a retracted condition to provide a yieldable force during at least a portion of the operation of the press assembly from the open condition toward the closed condition, said cushion assembly including a cylinder, a piston, said piston having a head end portion which is disposed in said cylinder and a rod end portion which extends from said head end portion through one end of said cylinder, said head end portion of said piston cooperates with said cylinder to at least partially define a chamber which holds fluid under pressure, a stop surface which is disposed in and is fixedly connected with said cylinder, said head end portion of said piston being pressed against said stop surface under the influence of a first force applied against said head end portion of said piston by fluid pressure in said chamber when said cushion assembly is in the extended condition, and biasing means for urging said head end portion of said piston away from said one end of said cylinder against the influence of fluid pressure in said chamber with a second force when said cushion assembly is in the extended condition, said second force having a magnitude which is at least as great as thirty-five percent (35%) of the magnitude of said first force.