Valve member for a balanced pressure reducer

Details Valve member for a balanced pressure reducer Valve member for a balanced pressure reducer

2005-08-01

2008-03-11

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

C137S375000, C137S505410, C137S505420

Reexamination Certificate

active

07341073

ABSTRACT:
A valve member (1) for a balanced pressure reducer, said valve member (1) having a wide head (1′) designed to co-operate with a valve seat (6), said valve member (1) having a central body (2) made of a material that is hard and that withstands high pressures, said central body (2) being covered at least in part with a first layer (3) of a rigid plastics material, said first layer (3) of a rigid plastics material being covered at least in part with a second layer (5) of a less rigid plastics material, no contact between the less rigid second layer (5) and the central body (2) occurring in that zone of said valve member (1) which is subjected to the high pressures.

REFERENCES:
patent: 1352735 (1920-09-01), Egerton
patent: 1781129 (1930-11-01), Sexauer
patent: 2745631 (1956-05-01), Shellman
patent: 2918089 (1959-12-01), McFarland, Jr.
patent: 3086550 (1963-04-01), Cummings
patent: 4129144 (1978-12-01), Andersson et al.
patent: 5139046 (1992-08-01), Galli
patent: 5413096 (1995-05-01), Hart
patent: 5746198 (1998-05-01), Taba et al.
patent: 5911220 (1999-06-01), Morgan et al.
patent: 2002/0157669 (2002-10-01), Chen

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