US PATENT SUBCLASS 73 / 66
ROTOR UNBALANCE

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

66ROTOR UNBALANCE {7}
455  DF  .~> Propeller, impeller, or fluid coupling {1}
457  DF  .~> In situ {1}
459  DF  .~> Combined static and dynamic
460  DF  .~> Dynamic (spinning) {4}
480  DF  .~> Gravitational moment turns rotor about spin axis {1}
482  DF  .~> Gravitational moment tilts rotor about axis transverse to spin axis {1}
487  DF  .~> Tool and adjunct

DEFINITION

Classification: 73/66

(under the class definition) Subject matter for determining the amount and/or location of masses or forces causing unbalance in rotatable bodies. The combination of a balance testing device with means to correct for the unbalance is classified with the latter. However, methods of testing for unbalance which broadly recite the additional step of adding or removing material in accordance with the indicated unbalance are found here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for devices for testing the aerodynamic balance of propellers and helicopter rotor blades.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

572+, for miscellaneous rotor structures including those having balancing means.

82, Turning, for the combination of balancing by turning. 123, Internal-Combustion Engines,

192.1+, for compensating devices for engines, e.g., crank shafts.

219, Electric Heating, for combinations of balancing by electric welding.

408, Cutting by Use of Rotating Axially Moving Tool,

2, for balancing by drilling.

451, Abrading, for the combination of balancing by abrading.