Piston with cast passages

Details Piston with cast passages Piston with cast passages

1999-01-29

2000-11-28

Look, Edward K.

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

92208, F01B 3110

Patent

active

061520160

ABSTRACT:
A piston is formed with one or more recesses or depressions on its underside as it is cast, molded or forged. The recesses are located adjacent the outer cylindrical wall of the piston head so that when a groove such as an oil ring groove is subsequently machined into the outer wall, the groove intersects and cuts into each recess. In this manner, oil drain ports are formed in the oil ring groove without the need for additional boring or cutting operations.

REFERENCES:
patent: 1633187 (1927-06-01), Norton
patent: 1959648 (1934-05-01), Tandy
patent: 3413897 (1968-12-01), Atkin
patent: 4599936 (1986-07-01), Bedwell et al.
patent: 4656711 (1987-04-01), Yagi et al.
patent: 4809591 (1989-03-01), Rhodes et al.
patent: 4836093 (1989-06-01), Wagner
patent: 5230148 (1993-07-01), Leites et al.
patent: 5655433 (1997-08-01), Santi
patent: 5778533 (1998-07-01), Kemnitz

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