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Class Information
Number: 137/395
Name: Fluid handling > Liquid level responsive or maintaining systems > Control of outflow from tank
Description: Apparatus which include means to control the outflow from the accumulation thereof in response to an element sensing the level of the accumulated liquid.

Sub-classes under this class:

Class Number Class Name Patents
137/398 By float 57
137/396 Self-emptying tanks 40

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8566989 Controlling method of clothes treating apparatus Oct. 29, 2013
8544282 Tank flow center for closed loop geothermal system Oct. 1, 2013
8418715 Control system Apr. 16, 2013
8371323 Method and apparatus for transporting a particulate material Feb. 12, 2013
8192616 Pressurized wastewater effluent chlorination system Jun. 5, 2012
8141584 Water collection, storage, and distribution system Mar. 27, 2012
8100873 System and method for collecting exudates Jan. 24, 2012
8065759 McClain's bathtub monitor Nov. 29, 2011
7951504 Fuel cartridge May. 31, 2011
7189365 Liquid treating equipment including a storage vessel and a discharge vessel Mar. 13, 2007
7156133 Liquid replenishment system Jan. 2, 2007
7066197 Supplying water to a reticulation system from different sources Jun. 27, 2006
7040840 Sewage effluent distribution means May. 9, 2006
6950032 Apparatus and method for protection against appliance leaking Sep. 27, 2005
6935367 Flotation cell fluid level control apparatus Aug. 30, 2005
6770194 Water overflow device and water return device Aug. 3, 2004
6684902 Dual sensor liquid accumulator Feb. 3, 2004
6598617 Cascaded variable bias feedforward and feedback flow and level control system Jul. 29, 2003
6497143 Container with automatically controlled discharge for continuous metering of liquid flow Dec. 24, 2002
6453939 Flotation cell fluid level control apparatus Sep. 24, 2002
6439417 Fuel tank and vehicle equipped with the same Aug. 27, 2002
6422263 Nested and cascaded variable bias feedfoward and feedback flow and level control system Jul. 23, 2002
6305405 Valve for a tank and especially for a flow control arrangement having a plurality of fluid storage tanks Oct. 23, 2001
6257287 Fuel fill pipe shut-off device Jul. 10, 2001
6253781 Process for controlling the level of an ammonium fluoride-containing acid solution in an acid vessel Jul. 3, 2001
6148838 Automated processing liquid drain system Nov. 21, 2000
6112947 Adjustable tank overflow for fluid chemicals Sep. 5, 2000
6095167 Rinse/dry apparatus including a chamber with a moveable side wall Aug. 1, 2000
6026837 Automated chemical drain system Feb. 22, 2000
6021806 Slurry distribution system for a CMP process in semiconductor device fabrication Feb. 8, 2000
5954078 Method and apparatus for handling liquid chemical waste Sep. 21, 1999
5894857 Fuel delivery device of fuel tank Apr. 20, 1999
5887613 Device for the regulation of a constant outflow from a liquid container Mar. 30, 1999
5871027 Vacuum valve controller Feb. 16, 1999
5851384 Apparatus for automatically delivering hemodialysis solution to a plurality of hemodialysis machines Dec. 22, 1998
5841028 Automated liquid-level vessel apparatus Nov. 24, 1998
5771178 Fail-safe fluid transfer controller Jun. 23, 1998
5553794 Sewage handling system Sep. 10, 1996
5519638 Automatic system for monitoring and replenishing hazardous liquids in tanks May. 21, 1996
5360412 Method and device for regulating intravenous flow Nov. 1, 1994
5321601 Apparatus for controlling flow in a sewer regulator Jun. 14, 1994
5234580 Decanting apparatus with float supported submerged pump Aug. 10, 1993
5053111 Method and apparatus for the batch distillation of water Oct. 1, 1991
5029620 Method of operating a gas recovery system and apparatus for employing the method Jul. 9, 1991
5012429 Method and apparatus for optimization of feedwater heater liquid level Apr. 30, 1991
4964437 Apparatus and method for control of oil leakage from damaged tanker Oct. 23, 1990
4956763 Portable self-contained surge level controller Sep. 11, 1990
4888097 Water purification method and apparatus Dec. 19, 1989
4686086 Process system including fluid flow control apparatus Aug. 11, 1987
4662391 Method and apparatus for splitting a liquid-vapor mixture May. 5, 1987

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