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Class Information
Number: 137/416
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > Quick acting
Description: Apparatus in which the float and/or the flow control means is operated during a shorter length of time than would be the case if the float and valve were free to respond continuously to the change in liquid level.










Sub-classes under this class:

Class Number Class Name Patents
137/422 Lost motion mechanism 21
137/418 Over center mechanism 14
137/417 Pilot float released 3
137/420 Trip mechanism 12


Patents under this class:

Patent Number Title Of Patent Date Issued
6886589 Float valve May. 3, 2005
6539973 Water pressure-assisted flush valve Apr. 1, 2003
6510866 Ball cock assembly, float assembly for same, and method of controlling liquid level in a tank Jan. 28, 2003
6497246 Pneumatic snap pilot Dec. 24, 2002
6354323 Liquid level controller Mar. 12, 2002
6240955 Liquid level controller Jun. 5, 2001
6123099 Pinch tube tank level control valve with snap-action shutoff Sep. 26, 2000
5992448 Liquid level controller Nov. 30, 1999
5638859 Float controlled valve Jun. 17, 1997
5542448 Latch attachment preventing chronic leakage Aug. 6, 1996
5472012 Storage tank shutoff valve Dec. 5, 1995
5230361 Snap action toggle valve actuator assembly Jul. 27, 1993
5191912 Liquid level controller Mar. 9, 1993
5080126 Float controlled valve Jan. 14, 1992
4998571 Overfill valve apparatus Mar. 12, 1991
4655244 Float operated valve Apr. 7, 1987
4635480 Density compensating float Jan. 13, 1987
4543973 Liquid level control apparatus and method Oct. 1, 1985
4483367 Stop fill valve Nov. 20, 1984
4436109 Magnetically coupled positive acting level control Mar. 13, 1984
4313459 Automatic fill-stop valve Feb. 2, 1982
4083661 Pneumatic sewage ejector Apr. 11, 1978
3993090 Automatic valving device Nov. 23, 1976











 
 
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