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Class Information
Number: 137/207.5
Name: Fluid handling > Diverse fluid containing pressure systems > Gas pressure storage over or displacement of liquid > With return of liquid to supply
Description: Apparatus in which the liquid in one part of the system is allowed to flow back, is forced back, or is by-passed back to the source of supply, in order to empty the system for cleaning, storage, etc.

Patents under this class:

Patent Number Title Of Patent Date Issued
8230613 Clothes treating apparatus Jul. 31, 2012
5803111 Device for purging water supply line Sep. 8, 1998
5660530 Pump system for biasing seals of a centrifugal pump Aug. 26, 1997
5257608 Device in a fuel system for an internal combustion engine Nov. 2, 1993
4799864 Hydro-pneumatic pumpsets Jan. 24, 1989
4475876 Oil purge system for cold weather shutdown of oil flooded screw compressor Oct. 9, 1984
4274405 Method for varying the ambient pressure in a vessel Jun. 23, 1981
4072168 Dual standpipe arrangement supplementing a water supply system Feb. 7, 1978

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