US PATENT SUBCLASS 187 / 272
.~ Includes fluid supporting ram 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}
272.~ Includes fluid supporting ram in drive-means {3}
273  DF  .~.~> Pneumatic (e.g., steam)
274  DF  .~.~> Plural fluid rams having interrelated operation
275  DF  .~.~> With fluid flow controlling means

DEFINITION

Classification: 187/272

Includes fluid supporting ram in drive-means:

(under subclass 250) Drive-means* including a fluid powered mechanism attached to the load-underlying support surface of the elevator having two concentric telescopic components which bear a portion of the weight of the load-underlying support surface and move it along the shaft* when telescoped.

(1) Note. The line between an elevator drive proper for this class (187) and a linear fluid motor and its control proper for Class 91, Motors: Expansible Chamber Type, or a linear fluid motor proper for Class 92, Expansible Chamber Devices is as follows:

(a)

Class 187 provides for elevating apparatus which claims more than a named load-underlying support surface moved between vertically spaced levels by a linear fluid motor or additional elevator structure which is not necessary to the internal fluid drive of the linear fluid motor (e.g., external load support guide structure, particular load-underlying support surface structure, particular elevator controls (e.g., rope controls), elevator counterbalances),

(b)

Class 91 provides for linear fluid motors and their controls moving a load between spaced positions and claiming a named load supporting surface, and

(c)

Class 92 provides for linear fluid motors moving a load between spaced positions and claiming a named load supporting surface. SEE OR SEARCH THIS CLASS, SUBCLASS:

215, for a stationary lift for a roadway vehicle having fluid

ram-type drive-means.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type, appropriate subclasses, for fluid pressure operated linear motors and their controls.

92, Expansible Chamber Devices, appropriate subclasses, for fluid pressure operated linear motors.

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

93, for fluid pressure operated lifting means.