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Class Information
Number: 137/396
Name: Fluid handling > Liquid level responsive or maintaining systems > Control of outflow from tank > Self-emptying tanks
Description: Apparatus in which a means sensing a predetermined, usually high, liquid level or a full condition of a tank which is accumulating liquid controls the opening of the tank outlet, allowing the liquid to discharge, and the closing of the outlet at a low level or when the tank is empty, the cycle being repeated as long as liquid is supplied to the tank.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 8544282 |
Tank flow center for closed loop geothermal system |
Oct. 1, 2013 |
| 8418715 |
Control system |
Apr. 16, 2013 |
| 8281801 |
Greywater system and method for applying same |
Oct. 9, 2012 |
| 8157132 |
Fuel and oil mixing device |
Apr. 17, 2012 |
| RE42771 |
Method of operation of a device for energy conversion using a main fuel and at least one auxiliary fuel |
Oct. 4, 2011 |
| 7597116 |
Marine greywater disposal system |
Oct. 6, 2009 |
| 7207318 |
Method for operation of a device for energy conversion using a main fuel and at least one auxiliary fuel |
Apr. 24, 2007 |
| 7055543 |
Solenoid actuated control for fuel distribution in a dual fuel tank vehicle |
Jun. 6, 2006 |
| 6792966 |
Fuel transfer pump and control |
Sep. 21, 2004 |
| 6782908 |
Automotive washer system utilizing a freezable washer liquid and a freeze-resistant washer liquid |
Aug. 31, 2004 |
| 6684902 |
Dual sensor liquid accumulator |
Feb. 3, 2004 |
| 6675795 |
Freeze resistant method for draining furnace condensate in low temperature environments |
Jan. 13, 2004 |
| 6554021 |
Apparatus for shock-like flushing in a liquid system |
Apr. 29, 2003 |
| 6494226 |
Fuel transfer pump and control |
Dec. 17, 2002 |
| 6467497 |
Buffer box for use in a vacuum drainage system |
Oct. 22, 2002 |
| 6449781 |
Apparatus for flushing in a liquid system |
Sep. 17, 2002 |
| 6279593 |
Electric steam trap system and method of draining condensate |
Aug. 28, 2001 |
| 6269831 |
Precision volumetric measuring and mixing apparatus |
Aug. 7, 2001 |
| 5954078 |
Method and apparatus for handling liquid chemical waste |
Sep. 21, 1999 |
| 5887613 |
Device for the regulation of a constant outflow from a liquid container |
Mar. 30, 1999 |
| 5871027 |
Vacuum valve controller |
Feb. 16, 1999 |
| 5657784 |
Control arrangement for actuating a shut-off valve and method of operation |
Aug. 19, 1997 |
| 5615701 |
Vacuum valve control device and vacuum valve |
Apr. 1, 1997 |
| 5588458 |
Vacuum valve controller for vacuum sewer system |
Dec. 31, 1996 |
| 5531241 |
Condensate trap and drain for systems under pressure |
Jul. 2, 1996 |
| 5449016 |
Sewage system |
Sep. 12, 1995 |
| 5429149 |
Valve assembly |
Jul. 4, 1995 |
| 5419359 |
Gas and liquid backflow-preventing valve device for drains |
May. 30, 1995 |
| 5375739 |
Apparatus for control of delivery of liquids |
Dec. 27, 1994 |
| 5259427 |
Package system for collection-transport of waste liquids |
Nov. 9, 1993 |
| 5207251 |
Liquid level sensing method and apparatus |
May. 4, 1993 |
| 5069243 |
Liquid level control system |
Dec. 3, 1991 |
| 5048558 |
Valve seat and method of repair |
Sep. 17, 1991 |
| 4870986 |
Dispensing system |
Oct. 3, 1989 |
| 4345618 |
Arrangement for the regulation of the height of a liquid level |
Aug. 24, 1982 |
| 4321948 |
Discharge system for septic tank |
Mar. 30, 1982 |
| 4285359 |
Interface unit for vacuum sewers |
Aug. 25, 1981 |
| 4257437 |
Liquid flow control |
Mar. 24, 1981 |
| 4202367 |
Circuit arrangement for regulating the level of liquid in vessels |
May. 13, 1980 |
| 3998736 |
Sewage disposal system |
Dec. 21, 1976 |
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