Title:
NEEDLE VALVE FOR FLOW CONTROL
Document Type and Number:
WIPO Patent Application WO2005111482
Kind Code:
A3
Abstract:
A needle valve assembly for providing fluid flow contrl includes a motor; an internally threaded valve body; and an externally threaded plunger threadably engaged with the internally threaded valve body and rotatably and reciprocally driven by the motor, wherein the valve body including a fluid inlet, a fluid outlet, and a flow chamber therebetween, the flow chamber including a flow chamber wall and a flow chamber outlet, the plunger including a flexible needle member reciprocating within the flow chamber outlet to provide variable flow control therethrough, the flexible needle member including a lip seal engageable with the flow chamber wall during reciprocation of the plunger and flexible needle member to provide a seal therebetween.
Inventors:
WINTER DAVID PHILLIP (US)
Application Number:
PCT/US2005/011229
Publication Date:
May 04, 2006
Filing Date:
April 04, 2005
Export Citation:
Assignee:
SEQUAL TECHNOLOGIES INC (US)
WINTER DAVID PHILLIP (US)
WINTER DAVID PHILLIP (US)
International Classes:
F16K1/38; F16K31/02; F16K31/04; (IPC1-7): F16K31/02; F16K31/44; F16K1/00; F16K15/00
Foreign References:
| US6764060B2 | 2004-07-20 | |||
| US3054422A | 1962-09-18 | |||
| US4574686A | 1986-03-11 | |||
| US4556193A | 1985-12-03 | |||
| US4351859A | 1982-09-28 |
Other References:
See also references of EP 1740863A4
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