Fluid control devices

Details Fluid control devices Fluid control devices

2008-04-15

2008-04-15

Hepperle, Stephen M (Department: 3753)

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

C251S282000, C251S332000

Reexamination Certificate

active

07357151

ABSTRACT:
Improved fluid control devices are provided for metering pressure effectively in environments that may contain solid particles and in which the ambient pressure is subject to change. Such a valve comprises a valve body containing a plunger assembly contacting a first spring, said plunger assembly having a cavity and including a second spring and a poppet assembly engaged to said second spring within said cavity; and valve seat means located in position to contact said poppet assembly and essentially prohibit flow through the valve when fluid pressure at the valve inlet is less than a predetermined differential pressure plus a fluid pressure at the valve outlet.

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EP Search Report #RS 110643 dated Apr. 27, 2004, 2 pgs.
PCT International Search Report & Written Opinion dated Feb. 9, 2005, 5 pgs.

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