Device for the regulation of flow applied to flow valves...

Details Device for the regulation of flow applied to flow valves... Device for the regulation of flow applied to flow valves...

2006-10-17

2006-10-17

Look, Edward K. (Department: 3751)

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

C251S029000

Reexamination Certificate

active

07121522

ABSTRACT:
A device for regulating flow comprises a main valve operating under differential pressure wherein the main valve has a main flow inlet and a main flow outlet. The main flow inlet is equipped with a valve seat over which a main shutter is adjusted in a perpendicular direction to its shuttering plane. The main shutter has a hole on its locking face communicating with a pressure chamber disposed above the main shutter. A secondary control valve regulates small flows through the hole so as to create greater or less pressure within the pressure chamber to close or open the main shutter.

REFERENCES:
patent: 882944 (1908-03-01), Haas
patent: 2573369 (1951-10-01), Snoddy
patent: 3459403 (1969-08-01), Royer
patent: 3712578 (1973-01-01), Dawson
patent: 3735772 (1973-05-01), Hunter et al.
patent: 4135696 (1979-01-01), Saarem et al.
patent: 5067516 (1991-11-01), Gale
patent: 5213124 (1993-05-01), Costa
patent: 5738332 (1998-04-01), Perez Corbalan
patent: 5769387 (1998-06-01), Perez C.
patent: 6102366 (2000-08-01), Perez C.

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