Solenoid-actuated diaphragm valve with biased disc spring
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United States of America Patent
Stats
-
Nov 28, 1995
Grant Date -
N/A
app pub date -
Aug 1, 1994
filing date -
Aug 2, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve apparatus wherein a diaphragm is provided above a valve seat in the valve body, employing a structure whereby the diaphragm can be depressed onto the valve seat, wherein a means of load is provided to depress the diaphragm, wherein an electromagnetic actuator is installed to separate the diaphragm from the valve seat, wherein a thin plate disc is provided with its center fixed to the periphery of the means of load and wherein a valve stem is positioned being fixed to the center of the thin plate disc. Driving the electromagnetic actuator, the valve stem is pulled up opposing the resilient force of the thin plate disc to allow the diaphragm to restore itself from its status being depressed onto the valve seat, thus controlling the aperture of the valve appropriately and smoothly. This invention therefore can provide a valve unit with a simplified structure but capable of maintaining a high cleanliness and improved flow rate controllability.
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