Resources Contact Us Home
Browse by Category: Main > Engineering
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

  Recently Added Patents
Low latency interrupt collector
Detachably integrated battery charger for mobile cell phones and like devices
Toy track intersection component
Low temperature pressure chamber unit, magnetic resonance device with a low temperature pressure chamber unit, and an attachment method to attach at least one add-on unit to an external housin
Bacterial superantigen vaccines
Media used in digital high speed inkjet web press printing
  Randomly Featured Patents
Heart valve prosthesis
Valve assembly for an apparatus under pressure
Method and apparatus for controlling residual battery capacity of secondary battery
Ornamental light
High strength, high toughness steel grade and gas cylinder thereof
Intergrated circuit tester
Positively chargeable toner
Method for generating a motion profile of a motor
Semiconductor device having a flash memory cell and fabrication method thereof
Ligand for G-protein coupled receptor GPR72 and uses thereof