US PATENT SUBCLASS 73 / 861.352
.~.~ Rotated resiliently coupled elements

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73 /   HD   MEASURING AND TESTING

861  DF  VOLUME OR RATE OF FLOW {23}
861.351  DF  .~ Mass flow by imparting angular or transverse momentum to the fluid {3}
861.352.~.~ Rotated resiliently coupled elements

DEFINITION

Classification: 73/861.352

Rotated resiliently coupled elements:

(under subclass 861.351) Subject matter wherein impellers or an impeller and drum are rotated at the same angular velocity by the fluid or drive means and connected by a biasing means, and the angular displacement between the members is a measure of mass flow.