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Class Information
Number:
137/489.3
Name:
Fluid handling
>
Line condition change responsive valves
>
Pilot or servo controlled
>
Fluid pressure type
>
Choked or throttled pressure type
> Loose fitting piston
Description:
Devices in which the unvalved passage is between the piston and the cylinder walls.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
6564827
Shut-off device for the filling device of a pressure tank
May. 20, 2003
4651768
Servovalve for pipe flange connection
Mar. 24, 1987
4366834
Back-flow prevention valve
Jan. 4, 1983
4192344
Automatic emergency stop apparatus against counter flow and counter fire of gas bodies
Mar. 11, 1980
3962884
Piloted freeze throttling valve
Jun. 15, 1976
3942333
Suction throttling valve
Mar. 9, 1976
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