Patent ID: 7395749

Claim:
A pneumatic cylinder comprising: a tubular body having first and second ends and defining an interior chamber; a cylinder rod having a piston end and an actuation end, said cylinder rod being hollow and passing through an opening located in said first end of said tubular body such that said piston end is located within said interior chamber and said actuation end is located outside of said tubular body, said piston end of said cylinder rod having an external threaded surface and an internal threaded surface; a piston assembly, said piston assembly connected to said cylinder rod at said piston end and having a bore traveling longitudinally therethrough; a cushion valve assembly, said cushion valve assembly comprising an elongated rod having a head portion and a piston portion, said head and piston portions being at opposed ends of said elongated rod; and wherein said elongated rod is positioned within said bore for reciprocating action therein and said piston portion is positioned within said hollow cylinder rod.