F - Mech Eng,Light,Heat,Weapons – 02 – F
Patent
F - Mech Eng,Light,Heat,Weapons
02
F
121/95
F02F 3/26 (2006.01) F02F 3/00 (2006.01) F02F 7/00 (2006.01) F16J 1/01 (2006.01) F02B 3/06 (2006.01)
Patent
CA 1289022
Abstract of the Invention A composite piston structure is disclosed which provides a simple and reliable means for joining a carbon-carbon or ceramic piston cap 11 with a metallic piston body 13. Attachment is achieved by means of a special geometry which compensates for differences in thermal expansion without complicated mechanical fastening devices. The shape employs a flange created by opposed frustoconical shapes 12 and 19 with coincident vertices is intersecting on the radial centerline of the piston in order to retain the piston cap. The use of carbon-carbon for the piston cap material allows a close fit between the piston and a cylinder wall, eliminating the need for piston rings. The elimination of extra mechanical part of previous composite pistons provides a lightweight composite piston capable of extended high temperature operation.
541659
Ade & Company
National Aeronautics And Space Administration
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