US PATENT SUBCLASS 187 / 252
.~.~ And reciprocatingly shifted pulley wheel pulling thereon

Current as of: June, 1999
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187 /   HD   ELEVATOR, INDUSTRIAL LIFT TRUCK, OR STATIONARY LIFT FOR VEHICLE

250  DF  HAVING SPECIFIC LOAD SUPPORT DRIVE-MEANS OR ITS CONTROL {6}
251  DF  .~ Includes linking support cable (e.g., rope, chain) in drive-means {2}
252.~.~ And reciprocatingly shifted pulley wheel pulling thereon {1}
253  DF  .~.~.~> Shifted by fluid ram

DEFINITION

Classification: 187/252

And reciprocatingly shifted pulley wheel pulling thereon:

(under subclass 251) Drive-means* also including an element having a generally circular perimeter which engages the cable* and is (a) freely (i.e., nonpowered) rotatable about an axis through its center in response to movement of the cable* over its perimeter and (b) attached at its axis to the source of power and bodily reciprocated thereby from one position to another to apply a pulling force to the cable*.

SEE OR SEARCH CLASS

254, Implements or Apparatus for Applying Pushing or Pulling Force,

385+, for a load supporting cable shifted by a cable engaging pulley reciprocated by drive means.