(under subclass 210) Drive-means* including a vertically extending, fluid powered mechanism which (a) is attached to the vehicle-underlying support surface and (b) has two concentric, telescoping components bearing a portion of the weight of the vehicle-underlying support surface when it travels vertically.
(1) Note. The line between a stationary vehicle lift 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:
(1)
Class 187 provides for lifting apparatus which claims more than a named stationary lift for a vehicle moving a vehicle in its entirety between vertically spaced levels by a linear fluid motor and additional 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 lifting apparatus controls (e.g., rope controls)),
(2)
Class 91 provides for linear fluid motors and their controls moving a load between spaced positions and claiming a named load supporting surface, and
(3) 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:
272+, for an elevator car with a fluid supporting ram in its 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 powered apparatus for lifting a portion of a vehicle a short distance.
