Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1978-05-12
1979-12-11
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
236 49, 251282, F16K 31126
Patent
active
041779703
ABSTRACT:
A valve assembly is disclosed for use in an air distribution system which includes a plenum chamber (2a, b) having an inlet opening (4) and an outlet (5). Conduit means are provided for admitting air to the plenum chamber through the inlet opening and include a generally cylindrical sleeve (6) having at least a portion thereof disposed within the plenum chamber, which portion includes aperture means (7) passing radially therethrough. A generally cylindrical valve member (9) is disposed within the sleeve and includes an axially extending portion for selectively blocking off the aforesaid aperture means. The valve member (9) is supported for axial movement between a first, closed, and a second, open position and may also be positioned at any point therebetween. Due to a slight clearance between the valve member (9) and the inner periphery of sleeve (6), a small amount of air flow is permitted to pass therebetween, whereby an axial force is imposed upon the valve member. A force balancing member (24) is provided in order to counteract this axial force by providing a restriction to the small amount of air flow, whereby a relatively low pressure area is created downstream of member (24), while a relatively high pressure area exists upstream therefrom. This pressure differential acts upon force balancing member (24) in order to counteract the axial force produced as a result of the aforesaid small amount of air flow.
REFERENCES:
patent: 2725891 (1955-12-01), De Bourgaignon et al.
patent: 2970806 (1961-02-01), Rexford et al.
patent: 3955595 (1976-05-01), Modes
patent: 3961748 (1976-06-01), McNabney
patent: 3974859 (1976-08-01), McNabney
patent: 4082114 (1978-04-01), Hontke et al.
Ferguson Peter D.
Lewis Carl M.
Schwadron Martin P.
The Trane Company
Walton G. L.
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