Insulated composite piston

Details Insulated composite piston Insulated composite piston

1977-12-16

1981-01-06

Cohen, Irwin C.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92176, 92221, 92224, 123193P, F01B 3108, F16J 100

Patent

active

042429480

ABSTRACT:
The disclosure illustrates an insulated composite piston comprising a crown of ceramic or other heat resistant material secured to an aluminum piston body by a bolt of temperature resistant alloy. A low conductivity interface between the crown and the body is provided by a series of stacked discs having low effective thermal conductivity. The relative thermal expansion of the parts is compensated for by bellville washers on the bolt. The above arrangement insulates the crown from the piston body thereby minimizing the temperature gradient across the crown so that its temperature can be maintained as high as necessary to increase efficiency and minimize noxious emissions.

REFERENCES:
patent: 1518048 (1924-12-01), Caughey
patent: 1857077 (1932-05-01), Adamson
patent: 1904070 (1933-04-01), Morgan
patent: 2058741 (1936-10-01), Taylor
patent: 2104347 (1938-01-01), Laricin
patent: 2194097 (1940-03-01), Reggid
patent: 2478294 (1949-08-01), Madsen
patent: 3136306 (1964-06-01), Kamm
patent: 3187643 (1965-06-01), Pope
patent: 3882841 (1975-05-01), Silverstein

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