(under subclass 111) Structure wherein the means for moving the shaft includes a motor utilizing a fluid as its source of power which motor is connected to the shaft and its base.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type, appropriate subclasses for an expansible chamber type motor, particularly
167+, for an apparatus wherein some of the extension equals the extension of individual chambers.
51+, for a mutually relatively movable cylinder or sleeve device.
212, Traversing Hoists, 238, and 261 for a load-handling (i.e., crane) boom and a fluid ram for swinging it in a vertical plane. See also subclass 297 for a crane-boom supporting tower and a fluid cylinder to raise the same from a horizontal-transport position.
343, Communications: Radio Wave Antennas,
902, for a telescoping fluid pressure actuated rod type antenna having a feature specialized to such use.
