Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Longitudinally extensible by flexible drive or hoist
Patent
1995-06-13
1996-06-11
Canfield, Robert J.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Longitudinally extensible by flexible drive or hoist
52114, 52116, 52117, 521231, 52119, 182207, 362418, 362285, E04H 1218, B66C 2300
Patent
active
055243983
ABSTRACT:
A portable collapsible tower including a frame, at least one stationary tower member fixed to the frame and at least one movable tower member movable along the exterior portion of the stationary tower member relative to the stationary member. A coupling, movably couples the stationary and movable tower members for movement along the exterior portions. At least one cable located along the exterior portions of the tower members, is used to extend and retract the tower members and a light or tool support bar. As the tension in the one or more cables is altered by a tension altering device, the support bar and tower members are moved between fully extended and fully retracted positions.
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L6 and L8 Portable Light Towers Brochure, .COPYRGT.1992 by Ingersoll-Rand Company, Form 2116B.
Hutchinson William R.
Miller David B.
Canfield Robert J.
Gnibus Michael M.
Ingersoll-Rand Company
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