US PATENT SUBCLASS 340 / 442
.~.~ Tire deflation or inflation

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

425.5  DF  LAND VEHICLE ALARMS OR INDICATORS {11}
438  DF  .~ Internal alarm or indicator responsive to a condition of the vehicle {13}
442.~.~ Tire deflation or inflation {2}
443  DF  .~.~.~> By indirect detection means (e.g., height measurement) {1}
445  DF  .~.~.~> With particular telemetric coupling {3}

DEFINITION

Classification: 340/442

Tire deflation or inflation:

(under subclass 438) Subject matter wherein the specific condition is a deviation from the proper inflation of a pneumatic tire.

(1) Note. This is the repository for on-board electric alarms or indicators of under inflation in vehicle mounted pneumatic tires and of unbalanced inflation in vehicle mounted paired (dual) tires.

(2) Note. The alarm or indicator here is triggered by the inflation pressure falling below a preset limit. Indicators which directly report a quantitative measurement of the tire pressure are classified in Class 73.

SEE OR SEARCH CLASS

73, Measuring and Testing,

146+, for quantitative measurement of pneumatic tire pressure.

116, Signals and Indicators,

34+, for nonelectric tire deflation alarms or indicators. 152, Resilient Tires and Wheels,

415+, and 418+ for systems which maintain tire air pressure by means of an on-board air supply.