US PATENT SUBCLASS 187 / 267
.~ Includes threaded rider mating with support screw in drive-means


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



187 /   HD   ELEVATOR, INDUSTRIAL LIFT TRUCK, OR STATIONARY LIFT FOR VEHICLE

250  DF  HAVING SPECIFIC LOAD SUPPORT DRIVE-MEANS OR ITS CONTROL {6}
267.~ Includes threaded rider mating with support screw in drive-means {1}
268  DF  .~.~> Driven rider


DEFINITION

Classification: 187/267

Includes threaded rider mating with support screw in drive means:

(under subclass 250) Drive-means* including (a) an element attached to the load-underlying support surface of the elevator which has an aperture therein with an internally facing threaded tooth and (b) a cylindrical rod passing through the aperture and mounted along the length of the shaft* which has a tooth on its outer surface threaded around the longitudinal axis of the rod and mating with the tooth of the element, and rotating relative thereto, when power is transmitted to the load-underlying support surface to shift it along the shaft*.

SEE OR SEARCH CLASS

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

98+, for screw type means for lifting a load.