Diaphragm valve and a valve housing for a diaphragm valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 22, 2001
Grant Date -
N/A
app pub date -
Feb 24, 2000
filing date -
Sep 9, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A housing of diaphragm valve has two valve chambers (11, 12). A central channel (21, 22) opens in each valve chamber and has an external connection (B, D). On each side of the central channels there are first (17, 19) and second side channels (18, 20) having an external connection (A, C). Each valve chamber has two valve seats (13, 14, 15, 16). Diaphragms (23, 24) are arranged to seal against the valve seats. Control means (25, 26) are arranged to press portions of the diaphragms (23, 24) against one valve seat each, thereby shutting passage between a central channel and a side channel, and to raise portions of the diaphragms off the valve seats, thereby to open passage between a central channel and a side channel. The first side channels (17, 19) are interconnected and both are connected to a common external connection (A), and the second side channels (18, 20) are interconnected and both are connected to a common external connection (C).
First Claim
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International Classification(s)
Cited Art Landscape
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