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Title:
【発明の名称】マルチモード空気リレー
Document Type and Number:
Japanese Patent JP3009710
Kind Code:
B2
Abstract:
A four-mode pneumatic relay includes a relay body defining four chambers, each coupled to a port. Two of the chambers are formed by a diaphragm assembly consisting of a rolling diaphragm coupled to an input post that drives a movable orifice shaft and a pair of diaphragms of different effective areas coupled to said movable orifice shaft. A movable plug assembly includes valve plugs for interconnecting the first chamber with the second chamber and the second chamber with the third chamber via a valve seat and an orifice and recess in the movable orifice shaft. A pair of mechanical switches couple different ones of said ports for providing multi-mode operation. One switch supplies input pressure to either the first port or the third port and another switch couples the second and fourth ports together or vents the fourth port.

Inventors:
Stephen Burr Pauls
Richard Jay Winkler
Application Number:
JP19319390A
Publication Date:
February 14, 2000
Filing Date:
July 23, 1990
Export Citation:
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Assignee:
Fisher Controls International Inc.
International Classes:
F15C3/04; (IPC1-7): F15C3/04
Domestic Patent References:
JP59206910A
JP463364A
JP61109901U
JP60159206U
JP4613525B1
JP47696B1
Other References:
【文献】米国特許4653523(US,A)
【文献】米国特許4974625(US,A)
【文献】米国特許3602246(US,A)
【文献】米国特許3604460(US,A)
【文献】独国特許出願公開2713998(DE,A1)
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)



 
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