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Class Information
Number: 73/309
Name: Measuring and testing > Liquid level or depth gauge > Float > Buoyancy type
Description: Gauges wherein the level or depth is determined by measuring the buoyant effort exerted by the liquid upon a buoyant body.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7451773 |
Dishwasher |
Nov. 18, 2008 |
| 7401571 |
Gutter system indicator for indicating a clogged or partially clogged condition |
Jul. 22, 2008 |
| 7377163 |
Liquid level detector |
May. 27, 2008 |
| 7278293 |
Submersible probe |
Oct. 9, 2007 |
| 7259384 |
Fluid level optical detector with float having opaque and transmissive portions |
Aug. 21, 2007 |
| 7216537 |
Fiber optic flammable liquid measuring system |
May. 15, 2007 |
| 7066024 |
Float adapted to track an interface between two liquids of differing density |
Jun. 27, 2006 |
| 7021138 |
Fuel feeding apparatus |
Apr. 4, 2006 |
| 6945108 |
Fuel level system for automobile |
Sep. 20, 2005 |
| 6928862 |
Method of monitoring dual-phase liquid and interface levels |
Aug. 16, 2005 |
| 6880398 |
Fuel level detection device for a fuel tank |
Apr. 19, 2005 |
| 6851314 |
Apparatus and method for detecting a leak in a swimming pool |
Feb. 8, 2005 |
| 6813946 |
Liquid sensing |
Nov. 9, 2004 |
| 6802219 |
Tide staff system |
Oct. 12, 2004 |
| 6786091 |
Gutter overflow detection device and system |
Sep. 7, 2004 |
| 6732580 |
Level sensor and control |
May. 11, 2004 |
| 6705163 |
Liquid level gauge and spool lock therefor |
Mar. 16, 2004 |
| 6588272 |
Redundant level measuring system |
Jul. 8, 2003 |
| 6536277 |
Level-tracing water-monitoring apparatus |
Mar. 25, 2003 |
| 6532814 |
Apparatus and method for detecting a leak in a swimming pool |
Mar. 18, 2003 |
| 6508120 |
Fluid level monitor with at least partially submersible buoyant element |
Jan. 21, 2003 |
| 6502461 |
Method and apparatus for monitoring liquid level in a container |
Jan. 7, 2003 |
| 6481277 |
Temperature control unit and sight glass |
Nov. 19, 2002 |
| 6464465 |
Level control device for a wastewater collection basin |
Oct. 15, 2002 |
| 6427529 |
Instrument for surveying the depth and volume of oil and brine in a static fluid column of an oil well |
Aug. 6, 2002 |
| 6326895 |
Fluid level sensor for fluid tanks of boats |
Dec. 4, 2001 |
| 6305220 |
Fuel gauging system for a motor vehicle fuel tank |
Oct. 23, 2001 |
| 6276200 |
Liquid level controller |
Aug. 21, 2001 |
| 6253609 |
Liquid level gauge with hinged float arm |
Jul. 3, 2001 |
| 6236324 |
Elastic plate liquid level sensor |
May. 22, 2001 |
| 6216534 |
Liquid level gauge with hinged float arm |
Apr. 17, 2001 |
| 6202487 |
Liquid level detecting device including a container having a first receptacle and a second receptacle |
Mar. 20, 2001 |
| 6170328 |
Lever gauge with hinged arms |
Jan. 9, 2001 |
| 6125697 |
Apparatus and method for measuring the quantity of liquid in a liquid reservoir |
Oct. 3, 2000 |
| 6029514 |
Device for measuring the volume of liquid in a container |
Feb. 29, 2000 |
| 6026683 |
Liquid level/volume measuring system using strain-gauge load cell and method of measuring liquid level/volume |
Feb. 22, 2000 |
| 6003366 |
Liquid level indicating method and system |
Dec. 21, 1999 |
| 5924285 |
Master cylinder tank |
Jul. 20, 1999 |
| 5872509 |
Device for sensing the amount of oil in oil pans |
Feb. 16, 1999 |
| 5847276 |
Fluid displacement level, density and concentration measurement system |
Dec. 8, 1998 |
| 5744716 |
Fluid displacement level, density and concentration measurement system |
Apr. 28, 1998 |
| 5600998 |
Level sensor offset mounting mechanism |
Feb. 11, 1997 |
| 5315873 |
Liquid level detection apparatus and method thereof |
May. 31, 1994 |
| 5245874 |
Total precipitation gauge with float sensor |
Sep. 21, 1993 |
| 5157968 |
Apparatus for measuring the specific gravity, weight, level, and/or volume of a liquid in a container |
Oct. 27, 1992 |
| 5136883 |
Liquid level gage system |
Aug. 11, 1992 |
| 5132923 |
System for monitoring storage tanks |
Jul. 21, 1992 |
| 5073253 |
Froth level measurement |
Dec. 17, 1991 |
| 5069068 |
Fluid level maintenance sensor for use in a tank test system |
Dec. 3, 1991 |
| 5050432 |
Tank gauge |
Sep. 24, 1991 |
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