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Class Information
Number: 137/409
Name: Fluid handling > Liquid level responsive or maintaining systems > By float controlled valve
Description: Apparatus wherein the element which senses the liquid level floats on the liquid and is buoyed up thereby.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7604017 |
Water ingress detection system |
Oct. 20, 2009 |
| 7537020 |
Vacuum breaking device |
May. 26, 2009 |
| 7516753 |
Toilet tank plumbing fixture assembly |
Apr. 14, 2009 |
| 7392820 |
Liquid shut-off valve |
Jul. 1, 2008 |
| 7293577 |
Toilet tank plumbing fixture assembly |
Nov. 13, 2007 |
| 7243669 |
Float-responsive valve with premature closure prevention |
Jul. 17, 2007 |
| 7216664 |
Device for blocking the water outlet of a light liquid separator |
May. 15, 2007 |
| 7047999 |
Humidification chamber with float-valve having improved float |
May. 23, 2006 |
| 6913047 |
Drop tube assemblies adapted for use with a liquid reservoir |
Jul. 5, 2005 |
| 6845782 |
Multiple tank circulating fuel system |
Jan. 25, 2005 |
| 6670585 |
Humidity cabinet with automatic fluid fill system |
Dec. 30, 2003 |
| 6499503 |
Backflow valve |
Dec. 31, 2002 |
| 6497143 |
Container with automatically controlled discharge for continuous metering of liquid flow |
Dec. 24, 2002 |
| 6446665 |
Backwater valve |
Sep. 10, 2002 |
| 6415813 |
Shut-off valve for a tank |
Jul. 9, 2002 |
| 6318404 |
Backflow valve |
Nov. 20, 2001 |
| 6148852 |
Sump pit regulating valve |
Nov. 21, 2000 |
| 6021807 |
Water refilling control mechanism for a water tank |
Feb. 8, 2000 |
| 5950692 |
Arrangement for limiting the fill level of a fuel tank |
Sep. 14, 1999 |
| 5941417 |
Fill system equipped with apparatus for continuous controlled inflow to a balance tank |
Aug. 24, 1999 |
| 5814213 |
Skimming apparatus |
Sep. 29, 1998 |
| 5421110 |
Electric iron with reservoir fill-check float valve |
Jun. 6, 1995 |
| 5406972 |
Backwater valve |
Apr. 18, 1995 |
| 5398735 |
Filling regulator for liquid storage tank |
Mar. 21, 1995 |
| 5388622 |
Automatic shutoff valve |
Feb. 14, 1995 |
| 5121770 |
Hydraulically controlled valve for a cool tower and the like |
Jun. 16, 1992 |
| 5027870 |
Overfill prevention mechanism for storage tanks |
Jul. 2, 1991 |
| 4868933 |
Flush control devices |
Sep. 26, 1989 |
| 4689472 |
Control device for corrosion testing apparatus |
Aug. 25, 1987 |
| 4627460 |
Condensate discharge device for combustion apparatus |
Dec. 9, 1986 |
| 4568369 |
Method and apparatus for rapidly altering the temperature of fluid in a closed vessel |
Feb. 4, 1986 |
| 4461735 |
Humidifier with water overflow relief mechanism |
Jul. 24, 1984 |
| 4318421 |
Float controlled syphon valve for swimming pool cover |
Mar. 9, 1982 |
| 4187262 |
Carbonator and liquid level control |
Feb. 5, 1980 |
| 4019454 |
Boat plug apparatus |
Apr. 26, 1977 |
| 3985626 |
Arrangement for regulating the distillate height level in the degassing stage of an evaporation installation |
Oct. 12, 1976 |
| 3974654 |
Self-regulating tide gate |
Aug. 17, 1976 |
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