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Class Information
Number: 137/413
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > Servo relay operation of control > Fluid pressure
Description: Apparatus in which the float controls the application of fluid pressure for operating the flow control means.










Sub-classes under this class:

Class Number Class Name Patents
137/414 Flexible diaphragm valve 118
137/415 From tank 24


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8678050 Overflow protection device for an oil tank trailer Mar. 25, 2014
8550128 Fluid flow control valve with upper bleed port and system Oct. 8, 2013
8550111 Mechanism for controlling a gauge for indicating the amount of gas remaining in a gas tank Oct. 8, 2013
8430117 Refueling apparatus Apr. 30, 2013
8281823 Refueling apparatus with an automatic stop Oct. 9, 2012
8261769 Fluid level controller Sep. 11, 2012
8057192 Cyclic condensate pump having a three-way valve Nov. 15, 2011
7967025 Overfill protection device (OPD) Jun. 28, 2011
7891373 Flow control valve Feb. 22, 2011
7886780 Method and apparatus for preventing drug reservoir overfill Feb. 15, 2011
7814930 Refill control mechanism for a liquid holding tank Oct. 19, 2010
7806133 Fluid level controller Oct. 5, 2010
7584766 Overfill prevention valve for shallow tanks Sep. 8, 2009
7392822 Liquid level controller and pilot switch Jul. 1, 2008
7356856 Toilet overflow prevention device Apr. 15, 2008
7352287 Pneumatic controller Apr. 1, 2008
7284567 Liquid level controller Oct. 23, 2007
7240690 Valve assembly with overfill protection device and capacitive liquid level gauge Jul. 10, 2007
7219686 Tap assembly for a liquid vessel having an overfill protection device and a float controlled magnetic level gauge May. 22, 2007
6910499 Valve assembly for pressurized fluid vessel Jun. 28, 2005
6729367 Overflow prevention system and method using laminar-to-turbulent flow transition May. 4, 2004
6640829 Valve for a tap of a compressed or liquified gas cylinder, and tap provided with such a valve Nov. 4, 2003
6615863 Toilet fill valve tank isolation Sep. 9, 2003
6595236 Valve Jul. 22, 2003
6539973 Water pressure-assisted flush valve Apr. 1, 2003
6513541 Vent valve Feb. 4, 2003
6497246 Pneumatic snap pilot Dec. 24, 2002
6354323 Liquid level controller Mar. 12, 2002
6311723 Flow control valve assembly Nov. 6, 2001
6263905 Automatic regulating valve apparatus Jul. 24, 2001
6247492 Overfill protection for fuel tanks Jun. 19, 2001
6244829 Liquid forced-feed apparatus Jun. 12, 2001
6230730 Container having collapsible inline fluid-weight control device May. 15, 2001
6202676 Magnetic liquid control for boiler feedwater receivers Mar. 20, 2001
6178994 Tap for compressed or liquefied gases having an overcharging prevention function Jan. 30, 2001
6155791 Wet/dry glycol pump automatic shut-down system Dec. 5, 2000
6138709 Overfill protection device Oct. 31, 2000
6076547 Device for operating a mechanism of a rinsing fixture Jun. 20, 2000
6035888 Fill valve Mar. 14, 2000
5992448 Liquid level controller Nov. 30, 1999
5983919 Automatic drain valve Nov. 16, 1999
5920920 Straight trap toilet apparatus Jul. 13, 1999
5887609 Container having fluid-weight control device Mar. 30, 1999
5850849 Storage tank shutoff valve with double cam assembly Dec. 22, 1998
5842500 Overfill preventing valve Dec. 1, 1998
5839465 Above-ground tank auto-limiter Nov. 24, 1998
5832953 Overfill shut-off system for liquid storage tanks Nov. 10, 1998
5829465 Container having fluid-weight control device Nov. 3, 1998
5813432 Automatic shut-off valve arrangement Sep. 29, 1998
5655565 Above-ground tank auto-limiter Aug. 12, 1997

1 2










 
 
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