Piston with blow-by pressure relief

Details Piston with blow-by pressure relief Piston with blow-by pressure relief

1999-09-24

2000-09-19

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

F02F 322

Patent

active

061196479

ABSTRACT:
Pistons having holes extending from an outer face on piston lands to an interior portion of a piston are disclosed. The holes are used for venting blow-by gasses so that an oil control ring may more effectively scrape a cylinder wall. The holes are covered with special check valves to allow the gasses to be vented while not allowing oil to be pumped from the interior portion of the piston to the cylinder walls.

REFERENCES:
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patent: 1754404 (1930-04-01), Sandford
patent: 1796792 (1931-03-01), Johnson
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patent: 2477760 (1949-08-01), Mennie
patent: 2653065 (1953-09-01), Appleton
patent: 2857218 (1958-10-01), Pachernegg
patent: 3336844 (1967-08-01), Cornet
patent: 3521531 (1970-07-01), Kaesemodel
patent: 4669369 (1987-06-01), Holt et al.
patent: 5546896 (1996-08-01), Zaiser
patent: 5737999 (1998-04-01), Ariga
patent: 5839407 (1998-11-01), Suzuki et al.

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