Sealing device for diaphragm valves

Details Sealing device for diaphragm valves Sealing device for diaphragm valves

1998-02-17

1999-10-19

Lee, Kevin

Valves and valve actuation

Reciprocating valve

Diaphragm

251368, F16K 716

Patent

active

059674920

ABSTRACT:
A fluid circuit sealing apparatus having a valve body with a valve base having a fluid inlet pipe and a fluid discharge pipe extending therethrough, a diaphragm having a cup shape, and a piston engageable with the diaphragm so as to deform the diaphragm so as to rest upon a seat provided on a rim of the inlet pipe. The diaphragm is clamped on an edge thereof between the valve body and the clamping cover. The diaphragm has a raised circumferential rim which forms an angle with a bottom of the diaphragm. The diaphragm has a parabolic dome. The raised circumferential rim has a circular upward fold portion extending to a slanting annular portion. The slanting annular portion is connected to the parabolic dome by a circular fold. The circular fold extends around a periphery of the parabolic dome.

REFERENCES:
patent: 5201492 (1993-04-01), Beauvir
patent: 5326078 (1994-07-01), Kimura
patent: 5524865 (1996-06-01), Uchisawa et al.

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