US PATENT SUBCLASS 187 / 352
.~ Includes gear on support mating with stationary rack

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

351  DF  HAVING SPECIFIC MEANS CONTACTING OR ON LOAD SUPPORT FOR STOPPING OR SLOWING THEREOF {4}
352.~ Includes gear on support mating with stationary rack {1}
353  DF  .~.~> Worm-type gear

DEFINITION

Classification: 187/352

Includes gear on support mating with stationary rack:

(under subclass 351) Subject matter wherein the retaining, halting, or retarding means includes (a) a toothed gear rotatively attached to the load-underlying support surface of the elevator and provided with means to inhibit its rotation 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 rotatable gear intermesh.