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Patent Searching and Data


Title:
PINCH ELEMENT PLASTIC VALVE
Document Type and Number:
WIPO Patent Application WO2000003165
Kind Code:
A3
Abstract:
A valve (20) has a contractible valve element (28) formed of an i nner laminae of PFA and an outer laminae of PTFE having bosses (54, 56). The contractible portion is welded to a PFA tubular end portion thus providing the advantages of a PTFE laminae with a boss and the PFA that it surfaces. The valve utilizes a valve mechanism (30) which has a yoke (38) which moves radially towards and away from the contractible valve element with linkages (42, 44) extending from the yoke arms which connect to the bosses. The v alve element may thus be positively closed and positively opened. The hermetic seal between the outer PTFE laminae and the inner PFA laminae causes the inner laminae to extend outwardly when the outer laminae is positively distended thereby allowing the valve to function where the fluid being controlled is under a negative pressure. The invention also includes the method of manufacturing the multiple layered valve element.

Inventors:
MCPEAK THOMAS J
LINDER JAMES C
MCKENZIE JEFFREY J
MELBOSTAD STEVEN A
JOHNSON MICHAEL W
Application Number:
US9915382W
Publication Date:
April 20, 2000
Filing Date:
July 09, 1999
Export Citation:
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Assignee:
FLUOROWARE INC (US)
International Classes:
F16K7/04; B29C65/32; F16K7/02; F16K7/06; (IPC1-7): F16K7/04
Foreign References:
US5297773A1994-03-29
US4929293A1990-05-29
US3791617A1974-02-12
US3473779A1969-10-21
US4326695A1982-04-27
US4876041A1989-10-24
US4927999A1990-05-22
US5526985A1996-06-18
Other References:
See also references of EP 1097327A4
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