Expansible chamber devices – With lubricating means – Piston has lubricant retaining or conducting means
Patent
1974-06-17
1978-08-01
Cohen, Irwin C.
Expansible chamber devices
With lubricating means
Piston has lubricant retaining or conducting means
92160, 277 79, 277168, 277170, F01M 1102, F16J 108
Patent
active
041035941
ABSTRACT:
A piston is formed with a peripheral groove for receiving a scraper ring, and an annular, axially extending recess is formed in the face of the scraper ring groove on the side thereof toward the piston crown and adjacent the piston wall, with the recess terminating in an oil-recovery lip at the piston wall and spaced from the adjacent oil-scraping edge of a scraper ring mounted in the groove. The annular recess acts as a reservoir for oil scraped from the wall of a cylinder in which the assembly is reciprocated, which oil is subject to a force attracting it toward the crown of the piston and permits the oil from the reservoir to flow between those adjacent surfaces of the ring and groove closer to the piston crown and out through an outlet from the groove.
REFERENCES:
patent: 1333023 (1920-03-01), Johnston
patent: 1462501 (1923-07-01), Barnwald
patent: 1534198 (1925-04-01), Wilson
patent: 1605040 (1926-11-01), Kreis
patent: 1737658 (1929-12-01), Howe
patent: 1740812 (1929-12-01), Farmer
patent: 2834643 (1958-05-01), Hutto
patent: 2951732 (1960-09-01), Brenneke
patent: 3396976 (1968-08-01), Reinhoudt et al.
patent: 3733973 (1973-05-01), Elsbett et al.
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