US PATENT SUBCLASS 187 / 214
.~.~.~ Having threaded rider and mating screw

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

203  DF  STATIONARY LIFT FOR ROADWAY VEHICLE OR REQUIRED COMPONENT THEREOF {7}
210  DF  .~ Having specific drive means for support {4}
213  DF  .~.~ Includes driven sustaining columns on opposite sides of support {1}
214.~.~.~ Having threaded rider and mating screw

DEFINITION

Classification: 187/214

Having threaded rider and mating screw:

(under subclass 213) Drive-means* wherein one of the force transmitting elongated structures includes both (a) an element attached to the vehicle-underlying support surface which has an aperture therein with an internally facing threaded tooth and (b) a cylindrical rod passing through the aperture which has a tooth on its outer surface threaded around the longitudinal axis of the rod, mating with the tooth of the aperture element, and rotating relative thereto when the vehicle-underlying support surface is elevated or lowered.

SEE OR SEARCH THIS CLASS, SUBCLASS:

267+, for an elevator car supported by threaded rider and screw drive means.