Rotational ram cylinder

F - Mech Eng,Light,Heat,Weapons – 15 – B

Patent

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Details

138/86, 121/97

F15B 15/20 (2006.01)

Patent

CA 1092488

Abstract of the Disclosure A ram cylinder assembly comprises a cylinder defining at least one closed operating chamber and having an inner surface of polygonal cross-section. A piston having an outer surface of corresponding polygonal cross-section is mounted in the cylinder for axial movement therein in response to fluid pressure in the chamber. These poly- gonal surfaces form a first, sliding connection. A shaft is rotatably mounted in the cylinder to extend axially through the piston while having at least one end extending to the exterior of the cylinder. An inner surface of the piston and an outer surface of the shaft have cross- sections forming a second, non-circular connection. At least one of the inner surfaces of the cylinder and the outer surface of the shaft has its cross-section twisted spirally whereby at least one of the connections becomes a driving connection that causes rotational movement of the shaft relative to the cylinder upon axial movement of the piston.

315749

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