Telescopic rod

Details Telescopic rod Telescopic rod

1995-02-15

1997-05-27

Brahan, Thomas J.

Traversing hoists

Boom or mast

Extensible by sliding sections

212230, E04H 1234

Patent

active

056323956

ABSTRACT:
A telescopic rod with a plurality of tubular rod sections which are mounted so as to be slidable within each other, and with a multistage piston-cylinder unit arranged within the telescopic rod. The multistage piston-cylinder unit is connected, on the one hand, to the outermost rod section of the telescopic rod and, on the other hand, to the last inner rod section of the telescopic rod. Radially adjustable abutments are provided on the inner base portions of at least some of the rod sections, wherein the abutments are directed toward the outer surfaces of the extended stages of the piston-cylinder unit and can be placed in contact with the outer surfaces. Stationary abutments may be arranged on the first and last rod sections of the row of rod sections of the telescopic rod, wherein the stationary abutments are arranged adjacent the outer surfaces of the corresponding stages of the piston-cylinder unit when the piston-cylinder unit is extended.

REFERENCES:
patent: 3722154 (1973-03-01), Sakamoto et al.
patent: 3792555 (1974-02-01), Sung
patent: 4946051 (1990-08-01), Cliff

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