Patent ID: 6536327
Filing Date: 2003-03-25
Classification: F15B

Abstract:
A pneumatic cylinder comprising:a cylinder tube having at least one open end; an end cap coupled to the open end of the cylinder tube; and a piston reciprocally movable within the cylinder tube, wherein the piston includes at least a first seal thereon to create a substantially fluid-tight seal with an internal surface of the cylinder tube, the piston further including a piston spear at an end portion thereof, the end cap further includes a cooperating piston spear receiving space dimensioned to receive the piston spear therein, wherein one of the end cap piston spear receiving space and piston spear includes a second seal for creating a substantially fluid-tight seal therebetween thereby establishing a non-vented volume chamber between the at least first seal and second seal such that air is trapped within the non-vented volume chamber and upon compression provides cushioning at an and of a piston stroke.