Flush valve

Details Flush valve Flush valve

2006-07-05

2009-02-10

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

C251S038000

Reexamination Certificate

active

07487950

ABSTRACT:
Tilting of a main valve assembly in unison with the head portion of a pilot valve under high inlet pressure conditions is prevented by supporting the main valve assembly with housing rib engaging a skirt on the main valve guide tube opposed to the handle actuated push rod. A positive, toggle like pilot valve opening results from contact of an enlargement on the pilot valve stem with the push rod as the pilot valve begins its upward movement. An off center baffle in the inlet passage compensates for the non uniform pressure pattern resulting from the side entry inlet. The pilot valve head includes an easily replaceable cup shaped seal having a reentrant rim engaging the pilot valve surface in the main valve member and having an upper central portion engaging an abutment with a valve rotator configuration is the full open position. A secondary throttling structure provided by a skirt on the guide tube cooperating with a shoulder in the outlet passage provides a desirable large flush flow for siphon fixtures.

REFERENCES:
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patent: 6216730 (2001-04-01), Hall
patent: 6299127 (2001-10-01), Wilson
patent: 6299128 (2001-10-01), Verdecchia
patent: 6499152 (2002-12-01), Johnson
patent: 197 38 723 (1998-03-01), None

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