US PATENT SUBCLASS 73 / 305
.~ Float

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

290 R  DF  LIQUID LEVEL OR DEPTH GAUGE {13}
305.~ Float {12}
306  DF  .~.~> Combined {1}
309  DF  .~.~> Buoyancy type
310  DF  .~.~> Total registering
311  DF  .~.~> Multiple floats
312  DF  .~.~> Recording
313  DF  .~.~> With electrically controlled indicator
314  DF  .~.~> With position sensing
315  DF  .~.~> With float lock
316  DF  .~.~> With fluid transmission
317  DF  .~.~> Pivoted float arm {1}
319  DF  .~.~> Vertically reciprocable {3}
322.5  DF  .~.~> Float structure

DEFINITION

Classification: 73/305

(under subclass 290) 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.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

257.073, for a float atop a column of fluent coating material, which float is intended for contact with an applicator to indicate the desired extent of immersion of the tool of the applicator in the supply as the level of the supply drops.

43, Fishing, Trapping, and Vermin Destroying,

43.1+, for floats used on fishing lines functioning to control and support the line.

137, Fluid Handling, 386+, particularly subclasses 397, 398+ and 409+ for float controlled valves.

164, Metal Founding,

156.1, and 450.1 for a metal casting apparatus having an electrical or float level sensor.