US PATENT SUBCLASS 318 / 13
.~.~.~.~ Differential type

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

3  DF  WITH PARTICULAR MOTOR-DRIVEN LOAD DEVICE {4}
9  DF  .~ Power- or motion-transmitting mechanism {4}
11  DF  .~.~ Variable speed mechanism {1}
12  DF  .~.~.~ Gearing {1}
13.~.~.~.~ Differential type

DEFINITION

Classification: 318/13

(under subclass 12) Subject matter in which the variable speed gearing is a differential gearing with means for varying the output speed of the gearing when the speed of the driving electric motor is at a predetermined single value.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8, for this subject matter where the differential gearing is driven by plural, diverse, or diversely controlled electric motors.