Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1994-01-25
1995-04-18
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
137855, F16K 1514
Patent
active
054069769
ABSTRACT:
A gasket which is interposed between a pair of valve bodies of an automatic transmission each of which is provided with a hydraulic circuit for feeding operating fluid to frictional engaging elements of the automatic transmission. The gasket which is interposed between the pair of valve bodies is formed with a slit which in turn communicates with a fluid passage which in turn intercommunicate the hydraulic circuits of the pair of valve bodies, and has a valving element defined in the gasket by the slit. A portion on the side of the hydraulic circuit of one valve body is provided with a valve seat over which overlies and closes the slit. Depending upon the difference in pressure between the hydraulic circuits of the pair of valve bodies, the valving element elastically deforms itself so as to permit the flow of the operating fluid from one hydraulic circuit into the other hydraulic circuit. The numbers of component parts, the assembly steps and the quality control steps can be minimized so that the fabrication cost can be decreased, fabrication errors can be eliminated and highly stable and reliable sealability can be ensured.
REFERENCES:
patent: 623617 (1899-04-01), O'Crowley
patent: 2926693 (1960-03-01), Ziegler
patent: 3421545 (1969-01-01), DeMarco
patent: 4487662 (1984-12-01), Fischbeck
Jatco Corporation
Nilson Robert G.
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