Telescoping tube assembly

Details Telescoping tube assembly Telescoping tube assembly

1999-03-11

2000-02-22

Brahan, Thomas J.

Traversing hoists

Boom or mast

Extensible by sliding sections

52118, 74 8915, B66C 2304

Patent

active

060269707

ABSTRACT:
A telescoping tube assembly includes a first longitudinal tube section and a second longitudinal tube section disposed within the first longitudinal tube section and adapted for telescoping motion into and out of the first longitudinal tube section. A third longitudinal tube section is disposed within the second longitudinal tube section and is adapted for telescoping motion into and out of the second longitudinal tube section. A drive motor is joined to the second longitudinal tube section to move therewith and operates a first ball-screw assembly and a second ball-screw assembly. The first ball-screw assembly is operatively connected between the first longitudinal tube section and the second longitudinal tube section. The second ball-screw assembly is operatively connected between the second longitudinal tube section and the third longitudinal tube section.

REFERENCES:
patent: Re31627 (1984-07-01), Evans
patent: 4000661 (1977-01-01), Menzel
patent: 4298128 (1981-11-01), Gattu
patent: 4337868 (1982-07-01), Gattu
patent: 4396126 (1983-08-01), Moravec
patent: 4635491 (1987-01-01), Yamano et al.
patent: 4793187 (1988-12-01), Petrovsky
patent: 5377096 (1998-03-01), Van Doren et al.
patent: 5937699 (1999-08-01), Garrec

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