US PATENT SUBCLASS 73 / 170.01
FLUID FLOW DIRECTION (E.G., WIND SOCK, WEATHER VANE, ETC.)

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

170.01FLUID FLOW DIRECTION (E.G., WIND SOCK, WEATHER VANE, ETC.) {4}
170.02  DF  .~> Relative to aircraft or watercraft {1}
170.04  DF  .~> Using a drifter or tracer (e.g., smoke)
170.05  DF  .~> Using a fluid actuated alignment device (e.g., wind sock, weather vane, etc.) {3}
170.11  DF  .~> With velocity determination {4}

DEFINITION

Classification: 73/170.01

FLUID FLOW DIRECTION (E.G., WIND SOCK, WEATHER VANE, ETC.):

(under the class definition) Subject matter comprising an apparatus or method for determining the direction of flow of

fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

170.16+, for meteorological measuring not combined with direction determining.

170.29+, for oceanos:graphic measuring not combined with direction determining.

861+, for the measurement of a rate of fluid flow, per se; especially, subclass 861.85 for an anemometer, per se.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting, 412+, 422, 439+, and 477+ for a device of that class operated by fluid.

116, Signals and Indicators,

273+, for mechanical indicators of the presence or absence of fluid flow, as through a pipe, and subclasses 173+ for flags.

446, Amusement Devices: Toys,

199+, for a fluid operated changing or moving figure or figure part.