Apparatus for adjusting operating speed of fluid-driven equipment
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United States of America Patent
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Dec 26, 2000
Grant Date -
N/A
app pub date -
Jun 23, 1999
filing date -
Jun 25, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for adjusting an operating speed of a pneumatic valve 1 by means of a solenoid valve 2 including a disk-shaped orifice block 5 having a plurality of orifices 22-25 of different aperture sizes formed therein, and the orifice block is arranged rotatably between a sub-base 3 of the solenoid valve 2 and a main block 6. By rotating the orifice block 5, any one of said plurality of orifices formed in the orifice block 5 can be selectively inserted into the fluid passage between the pneumatic valve 1 and the solenoid valve 2. The operating speed of the pneumatic valve 1 can be easily adjusted in a digital manner, and the water hammer phenomenon can be effectively prevented.
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