Cylinder head gasket with one-way coolant flow valve

Details Cylinder head gasket with one-way coolant flow valve Cylinder head gasket with one-way coolant flow valve

2006-11-21

2006-11-21

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Cooling

Automatic coolant flow control

C123S1980DA

Reexamination Certificate

active

07137361

ABSTRACT:
A head gasket (48) which acts, when clamped between a cylinder head (28) and a block (22) in a liquid cooled internal combustion engine (20), to form a seal around the combustion chambers (24). A coolant flow path (32) routes through the engine (20) and its directed, in part, through the cylinder head (28) and the block (22), with a corresponding flow opening (54) formed in the head gasket (48) to accommodate flow of liquid coolant in a normal direction. The head gasket (48) includes a one-way valve (58) positioned in the flow opening (54) to allow the flow of coolant in a normal direction but to prevent the flow of liquid coolant through the flow opening (54) in an abnormal, reverse direction. The one-way valve (58) includes movable gate (66) which may be biased against a valve seat (64) in a normally closed condition. The one-way valve (58) can be made as a loose piece article of manufacture which is held in flow opening (54) by self-locking retention clips.

REFERENCES:
patent: 5004464 (1991-04-01), Leise, Jr.
patent: 5022662 (1991-06-01), Yasui
patent: 6305420 (2001-10-01), Atkinson et al.
patent: 6659094 (2003-12-01), Nakamizo et al.
patent: 6662791 (2003-12-01), Nakamizo et al.

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