Multi-layered thermal insulating piston cap

Details Multi-layered thermal insulating piston cap Multi-layered thermal insulating piston cap

1988-09-19

1989-09-05

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Honeycomb, or with grain orientation or elongated elements...

428608, 123193P, 92224, F02F 312

Patent

active

048638072

ABSTRACT:
A multi-layered insulating piston cap for cast metal pistons having an insulating, perforated metal sheet layer. A piston cap is provided having a top sheet continuous layer made of a heat and corrosion resistant metal for protecting the piston cap, a second layer made of heat and corrosion resistant metal sheet having a plurality of spaced apart perforations for providing trapped air spaces, a third layer made of a heat and corrosion resistant metal foil for sealing the perforations, and a fourth layer or porous, heat and corrosion resistant metal for anchoring the piston cap to the piston. One coined geometry can be used when blanking various sized cross-sections of piston cap.

REFERENCES:
patent: 3223004 (1965-12-01), Sabo
patent: 4245611 (1981-01-01), Mitchell et al.
patent: 4254621 (1981-03-01), Nagumo
patent: 4334507 (1982-06-01), Kohnert et al.
patent: 4531502 (1985-07-01), Mizuhara
patent: 4546048 (1985-10-01), Guenther
patent: 4550707 (1985-11-01), Kervagoret
patent: 4604945 (1986-08-01), Mizuhara

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