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Class Information
Number: 137/213
Name: Fluid handling > Diverse fluid containing pressure systems > Gas pressure storage over or displacement of liquid > With liquid level responsive gas vent or whistle
Description: Apparatus wherein a gas vent or whistle is opened in response to a predetermined liquid level.

Sub-classes under this class:

Class Number Class Name Patents
137/214 Combined high and low level responsive 4

Patents under this class:

Patent Number Title Of Patent Date Issued
8365758 Beverage barrel bladder system and apparatus Feb. 5, 2013
8104500 Acoustic liquid level detection Jan. 31, 2012
6125882 Fluid transfer system Oct. 3, 2000
5570714 Explosion-retardant containment vessel for storage of flammable liquids Nov. 5, 1996

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