Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1993-11-10
1994-10-04
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
251303, F16K 31124
Patent
active
053519337
ABSTRACT:
The present invention is concerned with a quick-acting gate valve for installation on intake and exhaust openings of ventilation systems, in particular, of rapid railway vehicles, comprising a frame containing at least one passage slot provided with an adjustable closure element which relative to the passage slot can be placed into closed and open positions by a servo drive controlled in response to air pressure. In order to permit actuation of a quick-acting gate valve of this type substantially in a friction-free manner during opening and closing, the valve, in the practice of the invention, is so designed that the edges laterally confining the at least one passage slot relative to the in-flow direction are of a convex curvature. Behind the edges, the closure element is designed and arranged in the form of a similarly convex yet lesser curved leaf spring, the length of which corresponds at least to the length of the convex-curved edges of the passage slot. One end of the leaf spring is held on the frame while the other end thereof is displaceably guided on the frame.
REFERENCES:
patent: 3057373 (1962-10-01), Bragg
patent: 4316408 (1982-02-01), Bolton et al.
patent: 4605198 (1986-08-01), Greiner
patent: 5106052 (1992-04-01), Datta et al.
patent: 5139048 (1992-08-01), Armstrong
German periodical entitled "Die Kalte und Kimatechnik," pub. date Nov. 1986, pp. 558 and 559.
Lee Kevin L.
Luwa Fahrzeugklimatechnik GmbH
Schwadron Martin P.
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