US 6,026,970 AGranted

Telescoping tube assembly

AssigneePaR Systems, Inc.

InventorsAlbert J. Sturm, Jr., Fred W. Hanson

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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.

Claims7

Dependent claims

A telescoping tube assembly comprising:

a first longitudinal tube section;
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 disposed within the second longitudinal tube section and adapted for telescoping motion into and out of the second longitudinal tube section;
a drive assembly comprising:
a first threaded screw joined to the first longitudinal tube section;
a first nut joined to the second longitudinal tube section to move therewith and operably coupled to the threads of the first threaded screw;
a second threaded screw joined to the second longitudinal tube section to move therewith;
a second nut joined to the third longitudinal tube section to move therewith and operably coupled to the threads of the second threaded screw;
and
a drive motor joined to the second longitudinal tube section to move therewith and to rotate the first nut and the second threaded screw.

7 more elements

Dependencies are inferred from the claim text.