US PATENT SUBCLASS 475 / 149
ELECTRIC OR MAGNETIC DRIVE OR CONTROL

Current as of: June, 1999
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475 /   HD   PLANETARY GEAR TRANSMISSION SYSTEMS OR COMPONENTS

149ELECTRIC OR MAGNETIC DRIVE OR CONTROL {4}
150  DF  .~> Differential drive or control
151  DF  .~> Plural power paths {1}
153  DF  .~> With condition responsive control
154  DF  .~> With electric or magnetic controlled brake {3}

DEFINITION

Classification: 475/149

ELECTRIC OR MAGNETIC DRIVE OR CONTROL:

(under the class definition) Subject matter wherein (1) the

planetary transmission is combined with an electric motor or generator to form a drive train or (2) means is provided to change the speed ratio* or otherwise regulate the operation of the planetary transmission by means of electric or magnetic energy.

(1) Note. Where the electric or magnetic energy regulates a fluid drive or a fluid control that in turn controls the transmission, the patents have been placed with the fluid drive or control under subclass 31.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4, and 5, for electric motor drives where plural power sources drives a planetary transmission.

13, for electric motors used as engine starters that are subsequently driven by the engine.

SEE OR SEARCH CLASS

192, Clutches and Power-Stop Control, 129+, and 150 for safety devices and overload controls that may turn off power from an electric motor.

310, Electrical Generator or Motor Structure,

83, for the combination with significant dynamo-electric machine structure.

318, Electricity, Motive Power Systems,

12+, and 15 for Class 310 structure having a significant electrical circuit. See section IE6B of the class 318 definitions for the line with this class. [figure]