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Patent Searching and Data


Title:
WIRELESS, INTRINSICALLY SAFE VALVE
Document Type and Number:
WIPO Patent Application WO2001071198
Kind Code:
A3
Abstract:
A valve system (10) that employs a piezo-electric element (38) to activate a fluid flow valve (18) so as to use a minimal amount of electrical energy. The piezo-electric element (38) activates a pilot pressure valve (36), which allows a control fluid to pass to a main control valve (44). The control fluid causes the main control valve (44) to activate a working element (16), which in turn operates the fluid flow valve (18). A switching assembly (70) is employed to activate the piezo-electric element (38). The switching assembly (70) can include various types of switching devices, such as RF switching devices, optical switching devices, infrared switching devices and low voltage electrical switching devices.

Inventors:
SCHNELL RICHARD E (US)
Application Number:
PCT/US2001/008869
Publication Date:
April 18, 2002
Filing Date:
March 20, 2001
Export Citation:
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Assignee:
ROSS OPERATING VALVE CO (US)
SCHNELL RICHARD E (US)
International Classes:
F15B13/042; F15B13/043; F15B21/08; F16K31/02; F16K31/12; H01H9/04; H01H35/00; (IPC1-7): F15B13/043
Foreign References:
US5706852A1998-01-13
US3954046A1976-05-04
US5709245A1998-01-20
US5543627A1996-08-06
US4443853A1984-04-17
US4412355A1983-10-25
US5570716A1996-11-05
Other References:
See also references of EP 1266143A2
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