Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1991-03-22
1993-10-12
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
251305, 277 27, 277174, F16K 4100
Patent
active
052518744
ABSTRACT:
An engine exhaust gas system includes a conduit for transferring exhaust gas, and a butterfly valve within the conduit for controlling communication of exhaust gas through the conduit. The butterfly valve is mounted on a shaft for pivoting relative to the conduit. The shaft is supported on a bushing in a transverse bore. Leakage through the clearance between the bushing and the shaft acts upon the transverse face of a washer which is freely slidable on the shaft, urging the latter into engagement with a retaining ring carried on the housing to effect sealing of the clearance. As the pressure of exhaust gases increases, the washer is urged more forcefully against the retaining ring, thereby improving the effectiveness of the seal.
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Patent Abstracts of Japan Dec. 23, 1988 & JP, A, 63 212 728 (Yamaha Motor Co. Ltd.) Sep. 5, 1988.
Coleman Steven W.
Lemon Angus R.
Murphy Rory
Allied-Signal Inc.
Antonis William N.
Decker Ken C.
Walton George L.
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