US PATENT SUBCLASS 187 / 270
.~ Includes gear on support mating with stationary rack or chain

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}
270.~ Includes gear on support mating with stationary rack or chain {1}
271  DF  .~.~> Worm-type gear

DEFINITION

Classification: 187/270

Includes gear on support mating with stationary rack or chain:

(under subclass 250) Drive-means* including both (a) a power transmitting toothed gear rotatively attached to the load-underlying support surface of the elevator and (b) a bar or chain mounted along the length of the shaft* and having a row of complementary teeth or apertures with which the teeth of the gear mate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

352+, for a gear mounted on the support surface and provided with rotation inhibiting means which mates with a stationary rack or chain.