US PATENT SUBCLASS 212 / 170
HAVING CLUTCH OR VARIABLE SPEED TRANSMISSION

Current as of: June, 1999
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212 /   HD   TRAVERSING HOISTS

170HAVING CLUTCH OR VARIABLE SPEED TRANSMISSION {4}
171  DF  .~> Traveling bridge
172  DF  .~> Power takeoff
173  DF  .~> Variable speed transmission
174  DF  .~> Including means to selectively couple plural hoist functions to common power shaft

DEFINITION

Classification: 212/170

HAVING CLUTCH OR VARIABLE SPEED TRANSMISSION:

(under the class definition) Apparatus including either (a) a selectively engageable drive between a motor and a load moving mechanism adapted to be driven by the motor, or (b) means to vary the ratio of the speed at the output of a motor to the speed at which a load-moving mechanism is driven by the motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

276+, for a clutch combined with means to disengage the clutch in response to a predetermined randomly occurring condition.

SEE OR SEARCH CLASS

254, Implements or Apparatus for Applying Push ing or Pulling Force,

301, 309, 317+, 346+, and 365+ for hoist having a clutch.