Piston and piston ring assemblies

Details Piston and piston ring assemblies Piston and piston ring assemblies

F - Mech Eng,Light,Heat,Weapons

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F02F 3/00 (2006.01) F02F 7/00 (2006.01) F16J 9/00 (2006.01) F16J 9/28 (2006.01)

Patent

CA 1239062

ABSTRACT OF THE DISCLOSURE A two ring piston and piston ring assembly has an upper thin steel compression ring and a lower ring which is thicker than the compression ring and which acts both as a compression ring and an oil control ring. The lower piston ring is made of a material which is more conformable than steel, for example a plastics material, which may be reinforced. In this way, effective sealing is provided using only two piston rings, while the frictional forces between the piston and an associated cylinder are reduced.

471854

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