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Class Information
Number: 73/305
Name: Measuring and testing > Liquid level or depth gauge > Float
Description: Liquid gauges wherein the liquid level or depth is indicated directly or indirectly by at least one float or buoyant body. The float may be fastened to a support insertable into the liquid or may be substantially permanently mounted in a container.










Sub-classes under this class:

Class Number Class Name Patents
73/309 Buoyancy type 101
73/306 Combined 46
73/322.5 Float structure 154
73/311 Multiple floats 52
73/317 Pivoted float arm 211
73/312 Recording 12
73/310 Total registering 6
73/319 Vertically reciprocable 167
73/313 With electrically controlled indicator 432
73/315 With float lock 15
73/316 With fluid transmission 4
73/314 With position sensing 128


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8695421 Fuel pump module including a horizontal sender gauge Apr. 15, 2014
8689627 Low liquid level detecting device and method Apr. 8, 2014
8650949 Liquid level sensor frequency output system Feb. 18, 2014
8643496 Contact for fluid level detection apparatus and fluid level detection apparatus Feb. 4, 2014
8601867 Magnetostrictive probe having phase separation float assembly Dec. 10, 2013
8539828 Magnetostrictive liquid density detector Sep. 24, 2013
8443664 Equalizing container for a hydraulic motor vehicle brake system May. 21, 2013
8397679 Liquid level control system Mar. 19, 2013
8333082 Condensate/water leak control switch Dec. 18, 2012
8299931 Ice safety device Oct. 30, 2012
8291946 Apparatus for sensing fuel level in fuel tank Oct. 23, 2012
8284064 Signal transmitter for a filling level sensor Oct. 9, 2012
8261612 Accumulator with both direct and remote quantity level indication Sep. 11, 2012
8156803 Liquid level detection apparatus for engine oil Apr. 17, 2012
8117911 Gauge for bulk fuel storage tanks Feb. 21, 2012
8096177 Fuel inventory monitoring system Jan. 17, 2012
7987042 Engine oil level detection system Jul. 26, 2011
7793539 Electrostatic charge control for in-tank fuel module components Sep. 14, 2010
7748269 Low liquid level detecting device and method Jul. 6, 2010
7707882 Gauge to indicate the level of beverage held in a beverage container May. 4, 2010
7681447 Liquid level detection apparatus Mar. 23, 2010
7640759 Condensate/water leak control switch Jan. 5, 2010
7640800 Filling level sensor Jan. 5, 2010
7610806 Electronic level gage assembly Nov. 3, 2009
7584658 Level transmitter Sep. 8, 2009
7574912 Collapsible liquid level measurement device with attachment Aug. 18, 2009
7565837 Fuel level sensor variable resistor assembly Jul. 28, 2009
7555946 Sealed fuel level sensors Jul. 7, 2009
7535333 Method for monitoring the contact resistance of a wiper May. 19, 2009
7520167 Fuel level gauge for use in automobile Apr. 21, 2009
7490514 Level sensor comprising a float for determining a fuel level in a fuel tank, and kit for such a level sensor Feb. 17, 2009
7484409 Fluid level switch Feb. 3, 2009
7486179 Low-level oil sensor Feb. 3, 2009
7467549 Electrostatic charge control for in-tank fuel module components Dec. 23, 2008
7458261 Liquid level detector Dec. 2, 2008
7437929 Liquid level detector Oct. 21, 2008
7418861 Mechanically self actuated liquid level sensor Sep. 2, 2008
7377163 Liquid level detector May. 27, 2008
7353704 Storage tank external gauge system Apr. 8, 2008
7350413 Liquid level detection apparatus Apr. 1, 2008
7340953 Liquid measuring vessel Mar. 11, 2008
7313956 Lubrication system Jan. 1, 2008
7284422 Fluid level measurement device Oct. 23, 2007
7259384 Fluid level optical detector with float having opaque and transmissive portions Aug. 21, 2007
7219546 Gear and drive shaft assembly for a float gauge May. 22, 2007
7193233 Variable area flow rate meter using optical sensing of float position in the duct Mar. 20, 2007
7188521 Horizontal liquid level measuring system Mar. 13, 2007
7140247 Electrostatic charge control for in-tank fuel module components Nov. 28, 2006
7131330 Submersible pump controller Nov. 7, 2006
7121140 Liquid quantity sensing device Oct. 17, 2006

1 2 3 4










 
 
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