.~ Extensible by movement of boom or boom segment along longitudinal axis thereof
DEFINITION
Classification: 212/264
Extensible by movement of boom or boom segment along longitudinal axis thereof:
(under subclass 255) Apparatus including a vertically swinging boom* and wherein either (a) means are provided which permits translational movement of the boom along its longitudinal axis and relative to the boom-supporting structure, or (b) the boom consists of a plurality of interconnected segments slidably related to one another whereby the effective length of the boom may be change.
SEE OR SEARCH THIS CLASS, SUBCLASS:
231, for a horizontally and vertically swinging extensible
boom.
299+, for booms collapsible for transport or storage.
348+, for extensible boom structure, per se.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings), 111+, for other extensible shaft structure.
