Needle valve for flow control
US7025329B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2004 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | May 27, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S251/903
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A needle valve assembly for providing fluid flow control 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.