Fluid handling – Systems – With flow control means for branched passages
Patent
1998-05-06
1999-10-26
Ferensic, Denise L.
Fluid handling
Systems
With flow control means for branched passages
251331, F16K 100
Patent
active
059710250
DESCRIPTION:
BRIEF SUMMARY
This application claims the benefit under 35 U.S.C. .sctn.371 of prior PCT International Application No. PCT/SE96/01441, which has an International filing date of Nov. 8, 1996, which designated the United States of America, the entire contents of which are hereby incorporated by references.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a development of the three-way diaphragm valve described in WO 95/00782.
2. Description of the Background Art
That diaphragm valve is intended for controlling a flow of gaseous or liquid fluid and includes a valve housing having a valve chamber. Into the valve chamber opens a central channel and on each side thereof a first side channel and a second side channel, respectively. Valve seat means is arranged in the housing and an elastic diaphragm is adapted to be brought into and away from sealing contact with at least one of the valve seat means by means of control means for actuating the diaphragm. At least one portion of each valve seat means is common to the central channel and one of the side channels. Two control means are arranged to press the diaphragm against one such portion each, thereby to shut passage of fluid between the central channel and the respective side channel. The two control means also raise one portion each of the diaphragm off the respective portion of the valve seat means thereby to open passage of flow between the central channel and the respective side channel.
SUMMARY OF THE INVENTION
This prior art diaphragm valve has proven to operate extremely well. There is, however, a desire to convert it to a four-way valve, i.e., a valve for mixing three flows, or, to direct one flow to one or more of three different outlets. In achieving this, the new diaphragm valve shall comply with the same extensive sanitary requirements as the prior one, it shall be simply and reliably operable and have relatively few movable parts.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
FIG. 1 is a first side-view of a valve according to the present invention;
FIG. 2 is a top view in the direction II--II indicated in FIG. 1;
FIG. 3 is a second side-view of the valve according to FIG. 1 seen in the direction III--III indicated in FIG. 1;
FIG. 4 is a vertical central section taken along line IV--IV in FIG. 3, but at a larger scale;
FIG. 5 is a section through the valve housing and the lower operating unit taken along line V--V in FIG. 4,
FIG. 6 is a top view of the valve housing;
FIG. 7 is a section taken along line VII--VII in FIG. 6;
FIG. 8 is a section taken along line VIII--VIII in FIG. 6;
FIG. 9 is a section taken along line IX--IX in FIG. 6; and
FIG. 10 is a bottom view of the valve housing.
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS
The four-way diaphragm valve according to the present invention includes three main parts: a valve housing 11, an upper operating unit 12 and a lower operating unit 13.
As initially stated, the valve according to the present invention constitutes a development of the three-way diaphragm valve described in WO 95/00782. That valve includes a valve housing and an operating unit capable of controlling movements of a diaphragm so as to bring the diaphragm into and away from sealing contact with valve seats provided in an upper surface of the valve housing around mouths of three channels provided in t
REFERENCES:
patent: 5469886 (1995-11-01), Noya
patent: 5549134 (1996-08-01), Browne et al.
patent: 5657786 (1997-08-01), DuRoss et al.
Farid Ramyar
Ferensic Denise L.
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