Thermally insulated piston

Details Thermally insulated piston Thermally insulated piston

1985-03-07

1986-08-12

Look, Edward K.

Expansible chamber devices

Piston

With enclosed insulating space in piston part

92212, 92224, 92231, 92260, F04B 3108

Patent

active

046049452

ABSTRACT:
This invention discloses a thermally insulated piston having a cap portion and a body portion. The cap can be made of metal or ceramic. The cap and body portion are joined together by a brazing alloy. The cap portion can have a groove for receiving the brazing alloy. The ceramic cap can have a retaining band portion in a retaining band groove the band being bonded to the body portion by a brazing alloy. The piston with the ceramic cap can have an interlayer between the cap and body portion, the interlayer being bonded to the cap portion and body portion by a brazing alloy. The interlayer can have an outer knife edge. The body portion has a machined groove adjacent to the cap portion comprised of cells filled with thermal insulating material.

REFERENCES:
patent: 1407202 (1922-02-01), Kubler
patent: 1482778 (1924-02-01), Bowmar
patent: 1490849 (1924-04-01), Philip
patent: 1700604 (1929-01-01), Wagener
patent: 2058741 (1936-10-01), Taylor
patent: 2537174 (1951-01-01), Townhill
patent: 3408995 (1958-11-01), Johnson
patent: 3613521 (1971-10-01), Itano
patent: 4242948 (1981-01-01), Stang et al.

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