US PATENT SUBCLASS 73 / 182
.~.~ Pressure differential type

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

178 R  DF  NAVIGATION {5}
181  DF  .~ Ship's log {4}
182.~.~ Pressure differential type {1}
183  DF  .~.~.~> With integrating means

DEFINITION

Classification: 73/182

(under subclass 181) Logs wherein the relative velocity of the craft and the fluid in which it is navigated produces a pressure differential in a device such as a Venturi, flow nozzle, orifice plate, Pitot or like device, which pressure

differential is a function of said relative velocity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

861.42+, for pressure differential flow meters of general application.