US PATENT SUBCLASS 137 / 551
WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

551WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS {6}
552  DF  .~> Plural {1}
552.7  DF  .~> Time
553  DF  .~> Position or extent of motion indicator {3}
557  DF  .~> Fluid pressure responsive indicator, recorder or alarm
558  DF  .~> Liquid level responsive indicator, recorder or alarm
559  DF  .~> Inspection means

DEFINITION

Classification: 137/551

(under the class definition) Apparatus comprising fluid handling means combined (1) with an indicator, register,

recorder, or alarm responsive to a condition or position of a part of the apparatus or of the fluid in the apparatus or (2) with means which permits inspection of normally hidden parts of the apparatus or of the fluid inside the apparatus.

(1) Note. A movable element performing a blocking, disabling or actuating function is not considered to be an indicator unless it or a cooperating member has some indicia with position indicating significance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+, for liquid level responsive whistles in diverse fluid containing pressure systems.

227+, for inflating stems and/or chucks with gauge or indicator.

524, for direct responsive valves biased closed with bias adjustment indicator. 586, for telltales which have no indicia associated therewith and which also serve as blocking means for access opening covers.

SEE OR SEARCH CLASS

73, Measuring and Testing, appropriate subclasses for pressure, level, temperature, etc., measuring and indicating means, per se.

116, Signals and Indicators, appropriate subclasses for mechanical signals and indicators.

222, Dispensing,

23+, for recorders, signals indicators, etc., in dispensers and subclasses 154+ for inspection devices in dispensers.

251, Valves and Valve Actuation,

297, for detents that inherently give an audible signal or click.

340, Communications: Electrical,

870.01+, for quantitative electric telemetering systems of general application, and subclasses 603+ for nonquantitative electric alarms responsive to fluent material condition, such as level.