Piston with lubricant-scraping ring and lubricant return ports

Details Piston with lubricant-scraping ring and lubricant return ports Piston with lubricant-scraping ring and lubricant return ports

1998-03-16

2000-10-24

Lopez, F. Daniel

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

92220, 92244, 92245, F16J 108, F16J 900

Patent

active

061350087

ABSTRACT:
A piston assembly including a piston having a work surface, a sidewall extending from the work surface, and ports in the sidewall. The piston assembly also includes a flexible lubricant-scraping ring clamped to the piston between the work surface and the ports, with the lubricant-scraping ring having an outer edge extending outwardly beyond the sidewall.

REFERENCES:
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patent: 1830937 (1931-11-01), Falkenstein
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patent: 2218638 (1940-10-01), Christenson
patent: 2471477 (1949-05-01), Bonnaud
patent: 2889183 (1959-06-01), Peras
patent: 2895772 (1959-07-01), Chapman et al.
patent: 3182569 (1965-05-01), Hieber
patent: 3608911 (1971-09-01), Prasse et al.
patent: 4714259 (1987-12-01), Mack et al.
patent: 4875405 (1989-10-01), Bernhardt et al.
patent: 5083593 (1992-01-01), Fogg
patent: 5231917 (1993-08-01), Wood
patent: 5474307 (1995-12-01), DeBiasse et al.

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