US PATENT SUBCLASS 73 / 204.13
.~.~ With auxiliary fluid contacting or in heat exchange relation with flow path (e.g., thermodilution)


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

861  DF  VOLUME OR RATE OF FLOW {23}
204.11  DF  .~ Thermal type {9}
204.13.~.~ With auxiliary fluid contacting or in heat exchange relation with flow path (e.g., thermodilution)


DEFINITION

Classification: 73/204.13

With auxiliary fluid contacting or in heat exchange relation with flow path (e.g., thermodilution):

(under subclass 204.11) Subject matter in which an additional fluid is introduced into the flow path of, or heat exchange relation with, the fluid being measured, to assist in the measurement.

(1) Note. Included herein is measuring flow of a reference fluid the parameters of which are known and comparison with measurements of the mixture with the fluid being observed.

(2) Note. Neither use of a fluid type thermal sensor, nor a probe cooling fluid, is of itself, basis for classification in this subclass.

SEE OR SEARCH CLASS

62, Refrigeration,

49, for measuring flow mass of a liquified gas.

128, Surgery, 691+, for a thermodilution blood flow measuring device.