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Class Information
Number: 137/434
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve > Float arm operated valve
Description: Apparatus in which the float responding to variations in liquid level is connected to the flow control means by means of a rod or arm which is pivoted at an end thereof and the arm turns about the pivot during operation.










Sub-classes under this class:

Class Number Class Name Patents
137/442 Assembly mounted on and having reciprocating valve element coaxial with inlet pipe 42
137/450 Balanced valves 11
137/449 Ball valves 36
137/451 Flexible valve 43
137/438 Movable nozzle or inlet terminal 7
137/448 Pivoted valve 103
137/447 Rotary valve element 23
137/439 Valve removable from outside container 4
137/436 With flow guide or restrictor 73
137/446 With interposed cam, gear or threaded connection 76
137/441 With refill pipe 42
137/445 With toggle or second lever connected to valve 47
137/440 With u-shaped inlet pipe having terminal valve 2
137/435 With valve retarder or cushion means 12


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8656943 Liquid appliance and transport lock Feb. 25, 2014
8631818 Vertical float valve assembly Jan. 21, 2014
8534313 Toilet fill valve auxiliary shutoff mechanism Sep. 17, 2013
8387652 Water saver fill valve and assembly Mar. 5, 2013
8333215 Toilet fill valve with valve lock Dec. 18, 2012
8296871 Toilet water tank refilling system Oct. 30, 2012
8166997 Toilet flush water supply device May. 1, 2012
8132589 Regulating valve for the discharge of liquid Mar. 13, 2012
8091581 Fluid level control toggle valve device and method Jan. 10, 2012
7967025 Overfill protection device (OPD) Jun. 28, 2011
7926511 Toilet fill valve with valve lock Apr. 19, 2011
7874312 Water level controller Jan. 25, 2011
7870868 Water conservation kit Jan. 18, 2011
7866334 Sewer pipe gas exhaust filter apparatus Jan. 11, 2011
7802587 Float valve and method Sep. 28, 2010
7798785 Automatic pressure-relieving apparatus for suction pump Sep. 21, 2010
7635431 Septic drain line flow control system Dec. 22, 2009
7520296 Device to adjust and control water levels Apr. 21, 2009
7481238 Automatic degassing valve Jan. 27, 2009
7392822 Liquid level controller and pilot switch Jul. 1, 2008
7357149 Auxiliary fuel tank systems for aircraft and methods for their manufacture and use Apr. 15, 2008
7331365 Lavatory service shut-off valve Feb. 19, 2008
7201178 Continuous chemical feeder and method of use thereof Apr. 10, 2007
7174912 Shut-off valve assembly Feb. 13, 2007
7171976 Steam trap with float Feb. 6, 2007
7128102 Drop tube segments adapted for use with a liquid reservoir Oct. 31, 2006
7096880 Float type steam trap Aug. 29, 2006
7089974 Float operated overfill protection device Aug. 15, 2006
7082962 Seal support system for maintaining barrier fluid pressure within a mechanical seal Aug. 1, 2006
6966334 Float valve for a christmas tree watering system Nov. 22, 2005
6953050 Float, particularly for level control in bottles of liquefied gas and the like Oct. 11, 2005
6938633 Method and apparatus for supplying process liquid for machine tool Sep. 6, 2005
6913047 Drop tube assemblies adapted for use with a liquid reservoir Jul. 5, 2005
6874529 Level limit valve Apr. 5, 2005
6837264 Toilet fill valve with valve lock Jan. 4, 2005
6783330 Self-priming centrifugal pump Aug. 31, 2004
6763845 Water freeze prevention device Jul. 20, 2004
6739584 Float apparatus of carburetor May. 25, 2004
6591861 Closed water-container storing device with water inlet/outlet Jul. 15, 2003
6581621 Valve and fuel tank provided with a valve for a motor vehicle Jun. 24, 2003
6523405 Portable bin full indicator Feb. 25, 2003
6415813 Shut-off valve for a tank Jul. 9, 2002
6370708 Toilet tank anti-refill device Apr. 16, 2002
6363962 Crash valve actuator Apr. 2, 2002
6045336 Pump and valve for leachate extraction of heavier than water fluids Apr. 4, 2000
6006779 Fluid cutoff system Dec. 28, 1999
5992448 Liquid level controller Nov. 30, 1999
5967175 Waste line stoppage detector and automatic water shutoff system Oct. 19, 1999
5916489 Float for carburetors Jun. 29, 1999
5904176 Silent valve ball cock assembly May. 18, 1999

1 2 3










 
 
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