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US 2007/0181837 A1Published application
Self-flushing needle valve
AssigneeMocon, Inc.
InventorsDaniel Mayer, Stephen Tuomela
Life of this patent
Estimating the term…
Abstract
A needle valve with a hollow needle effective for permitting a portion of the fluid passing through the valve to flow throughout the valve and exit through any leaks in the valve, whereby any environmental fluid within the valve is displaced by the fluid passing through the valve.
Claims6
A flow control valve comprising:
- (a) a valve body,
- (b) a needle valve configured and arranged for longitudinal reciprocation within the valve body
- (c) a spring biased valve stem plunger attached to the needle valve for longitudinal reciprocation with the needle valve, and
- (d) a lumen in the needle effective for permitting a minor portion of a fluid passing through the valve below the valve stem plunger to flow through the lumen and into the valve body above the valve stem plunger, and thereafter exit the valve body through any leaks in the valve, whereby any environmental fluid within the valve is displaced by the fluid passing through the valve.
1 more element
A flow control valve, comprising:
- (a) a valve body defining a chamber sealingly divided into a first portion and a second portion by a spring biased valve stem plunger with an first orifice and a second orifice in fluid communication with the first portion of the chamber, and
- (b) a needle attached to the valve stem plunger for longitudinal reciprocation with the valve stem plunger within the valve body, and longitudinally repositionable within the first orifice for restricting fluid flow through the first orifice to an extent dependant upon the longitudinal position of the needle within the first orifice,
- (c) wherein a lumen through the needle permits a fraction of a fluid flowing through the first portion of the chamber to flow through the lumen and into the second portion of the chamber.
Dependencies are inferred from the claim text.