Piston with ceramic insert that covers piston head portion defin

Details Piston with ceramic insert that covers piston head portion defin Piston with ceramic insert that covers piston head portion defin

1988-08-09

1990-07-24

Look, Edward K.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92222, 123193P, 123270, 123279, F16J 104

Patent

active

049428047

ABSTRACT:
A piston head has a cavity and a central projection projecting into the cavity. A ceramic insert is cast in a piston body so as to cover a piston head portion defining the cavity except the central projection-and-its adjacent piston head portion. The ceramic insert has an edge defining a hole through which the central projection projects into the ceramic insert. In one form of the embodiment, a clearance is provided between the edge of the ceramic insert and the central projection-and-its adjacent piston head portion.

REFERENCES:
patent: 3730163 (1973-05-01), Elsbett et al.
patent: 4018194 (1977-04-01), Mitchell et al.
patent: 4495684 (1985-01-01), Sander et al.
patent: 4662326 (1987-05-01), Kohnert
patent: 4711208 (1987-12-01), Sander et al.
patent: 4742759 (1988-05-01), Hayakawa

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