Valves and valve actuation – Rotary valves – Butterfly
Patent
1983-11-28
1986-02-25
Schwadron, Martin P.
Valves and valve actuation
Rotary valves
Butterfly
1375135, F16K 1226
Patent
active
045724784
ABSTRACT:
A throttle valve 4 is pivotally mounted about a shaft 3 within a connection-piece housing of a throttle-valve connection piece. In order to reduce the air leakage rate, means are provided for eddying the leakage air which, when the throttle valve is closed, passes between it and the wall of the bore of the connection-piece housing. The connection-piece housing preferably has two bores which open into each other forming a crescent-shaped step, against which the throttle valve rests in the closed position and a reduction in cross section on one side in the bore of the connection-piece housing is provided by an arcuate transition to the bore of smaller diameter and the crescent-shaped step is located on the opposite side.
REFERENCES:
patent: 813771 (1906-02-01), Bush
patent: 2946554 (1960-07-01), Asker et al.
patent: 3809361 (1974-05-01), Pfundstein et al.
patent: 3941151 (1976-03-01), Biddle
IBM Technical Disclosure Bulletin, vol. 10, No. 12, May 1968, p. 1988.
Ruschek Gerhard
Schlick Horst
Vogler Hans-Ulrich
Farber Martin A.
Fox John C.
Schwadron Martin P.
VDO Adolf Schindling AG
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