Internal-combustion engines – Particular piston and enclosing cylinder construction – Piston
Patent
1999-09-08
2000-09-12
McMahon, Marguerite
Internal-combustion engines
Particular piston and enclosing cylinder construction
Piston
277476, F16J 906
Patent
active
061162043
ABSTRACT:
A single-piece oil scraper piston ring includes a ring axis and first, second and third axially mutually spaced runner webs having a respective first, second and third runner face adapted to slidingly engage an engine cylinder wall during operation. The first and third runner webs flank the second runner web. A first connecting web couples the first runner web to the second runner web and a second connecting web couples the third runner web to the second runner web. First and second throughgoing oil outflow holes are provided in the first and second connecting webs, respectively. The piston ring further includes a first groove having a first side wall forming part of the first runner web and a second side wall; and a second groove axially spaced from the first groove and having a first side wall and a second side wall which forms part of the third runner web. First and second hose springs are received in the first and second grooves, respectively. The first hose spring exerts a force on the first side wall of the first groove for urging the first runner face radially outwardly and the second hose spring exerts a force on the second side wall of the second groove for urging the third runner face radially outwardly.
REFERENCES:
patent: 4045036 (1977-08-01), Shunta
patent: 4473232 (1984-09-01), Umeha
patent: 4522412 (1985-06-01), Kubo
patent: 5295696 (1994-03-01), Harayama et al.
Federal-Mogul Burscheid GmbH
Kelemen Gabor J.
McMahon Marguerite
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