Telescoping mast having variable height locking and a chain...

Details Telescoping mast having variable height locking and a chain... Telescoping mast having variable height locking and a chain...

2006-01-20

2009-11-24

Canfield, Robert J (Department: 3633)

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Longitudinally extensible by flexible drive or hoist

C052S118000, C052S632000, C254SDIG002, C474S225000

Reexamination Certificate

active

07621078

ABSTRACT:
A telescoping mast for supporting and raising a load may be telescopically extended by a zipper-action chain extension system further comprising a system for the management of one or more cables, such as power or communication cables traversing the length of the mast, and is capable of being locked into a rigid formation along a range of telescopic lengths.

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