Pneumatic valve assembly for controlling a stream of compressed air
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United States of America Patent
Stats
-
Oct 23, 1990
Grant Date -
N/A
app pub date -
Apr 10, 1989
filing date -
Apr 16, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a pneumatic valve assembly for controlling a compressed air stream in response to a non-contacting actuation. It is desired to provide such a valve assembly which is adapted to control high working pressures without an intermediate amplifier. This is accomplished in that a pivoted one-armed or double-armed lever is provided with a permanent magnet on one side or on each of both sides of its pivotal axis and via a ferromagnetic or magnetic actuating member which is moved into the proximity of the permanent magnet or magnets and via a plunger causes a pilot orifice to be opened or closed, which orifice is adapted to be flown through by a pilot air stream for actuating a pilot piston for moving a valve piston to positions in which the valve is opened or closed.
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