Compact field adjustable pressure reducing valve

Details Compact field adjustable pressure reducing valve Compact field adjustable pressure reducing valve

2005-05-09

2008-01-22

Hepperle, Stephane M. (Department: 3753)

Fluid handling

Processes

Involving pressure control

C137S495000, C137S505260, C137S505280

Reexamination Certificate

active

07320333

ABSTRACT:
A pressure reducing valve for coupling to a pressurized water supply line includes a valve body with an inlet for coupling to the pressurized water supply line, an outlet, a passage extending between the inlet and the outlet, and a valve seat in the passage. A valve stem extends into the passage, which has a sealing member. An automatic pressure reducing system is provided for urging the sealing member toward the valve seat for throttling the valve to thereby reduce the pressure at the outlet. The automatic pressure reducing system includes parallel springs that occupy less space than conventional springs for a given spring load.

REFERENCES:
patent: 1984792 (1934-12-01), Ford
patent: 2053611 (1936-09-01), Hill
patent: 3253611 (1966-05-01), Cummins
patent: 3392749 (1968-07-01), Gneiding et al.
patent: 3946756 (1976-03-01), Specht
patent: 4008735 (1977-02-01), Thompson
patent: 4100933 (1978-07-01), Davey et al.
patent: 4173986 (1979-11-01), Martin
patent: 4276902 (1981-07-01), Roth
patent: 5358004 (1994-10-01), Atkinson et al.
patent: 5662139 (1997-09-01), Lish
patent: 2006/0112994 (2006-06-01), Trapp

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