Fluid actuated cylinder assembly

A fluid actuated cylinder assembly adapted to be connected to a pressurized fluid system comprising:

• a cylinder barrel closed at one end thereof and open at the opposite end, said cylinder barrel having an annular groove formed in the interior circumferential surface thereof and a slot formed adjacent said opposite end;
• a cylinder head removably mounted in said opposite end of said cylinder barrel, said cylinder head having an annular groove formed in the exterior circumferential surface thereof in alignment with said annular groove formed in said cylinder barrel and an axially extending opening formed therein;
• a cylinder rod slidably mounted in said axially extending opening formed in said cylinder head;
• a piston connected with said cylinder rod within said cylinder barrel to form a first chamber and a second chamber;
• a ring member positioned in said annular grooves formed in said cylinder barrel and said cylinder head slidable through said slot formed in said cylinder barrel;
• first port means formed in said cylinder head for communicating said pressurized fluid system with said first chamber;
• said first port means comprising a channel extending from an exterior portion of said cylinder head to an interior wall portion of said cylinder head;
• said channel comprising an opening formed in said interior wall portion of said cylinder head, a radially extending port formed in said cylinder head, and a passage formed at an inclination to the longitudinal axis of said cylinder barrel;
• said cylinder head further comprising a projection member extending radially from said cylinder head outside the circumference of said cylinder barrel wherein said first port means is partially formed in said projection member;
• said ring member including a hook portion unitarily formed at one end thereof and wherein said cylinder head includes a second groove formed therein for cooperatively engaging said hook portion of said ring member;
• said cylinder head including a plurality of flat exterior surface portions forming a regular polygonal projection for cooperation with an associated tool for rotation of said cylinder head so as to position said ring member in said annular grooves formed in said cylinder barrel and said cylinder head and wherein said cylinder head further comprises a single removable cylinder head;
• and
• second port means formed in said cylinder barrel for communicating said pressurized fluid with said second chamber.