Patent ID: 6931980

Claim:
A pneumatic device, comprising: a body; a piston and a cylinder located within the body, wherein the piston is operable to translate along a first axis within the cylinder; a drive pin associated with the piston, wherein the drive pin is operable to translate along the first axis with the piston, and wherein the drive pin further comprises a driver portion and a generally hollow driven portion operably coupled to one another, wherein the driven portion comprises a first slot generally parallel to the first axis, and wherein the driver portion comprises a second dowel pin operable to translate within the first slot, therein coupling the driver portion and the driven portion; a clamping arm associated with the drive pin and the body, wherein the clamping arm is operably coupled to the drive pin, and wherein the translation of the piston along the first axis is operable to translate the clamping arm between a clamped and an unclamped position; an anti-rotation mechanism, wherein the piston is generally not permitted to rotate with respect to the cylinder, and wherein the anti-rotation mechanism is defined by a combination of the first slot, the second dowel pin, the clamping arm, and the body; a first port associated with a first end of the cylinder; a first cushioning hole associated with the first port, wherein the first port is further in fluid communication with an interior portion of the cylinder through the first cushioning hole; and a first cushioning pin associated with the piston and the first cushioning hole, wherein the first cushioning pin is operable to translate with the piston generally parallel with the first axis, and wherein the first cushioning pin is operable to enter the first cushioning hole, wherein a flow of gas between the interior portion of the cylinder and the first port is selectively limited by the first cushioning pin, depending on a location of the piston along the first axis.