Extendible tower structure

Details Extendible tower structure Extendible tower structure

1974-02-15

1976-05-25

Purser, Ernest R.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Fluid pressure actuated

92 53, 182 63, 254 93VA, B66F 1104

Patent

active

039583767

ABSTRACT:
An extendible tower is disclosed and includes a plurality of nestable tower sections that may be raised from a telescoping, nested position to an extended position and support a load thereat. A plurality of inverted hydraulic cylinders are located within the tower sections and are also nestable in a collapsed position. Upon receipt of hydraulic pressure, the cylinders move upwardly and extend the nested tower sections. In this regard, the hydraulic cylinder group is secured at opposite ends to a base and to the upper tower section with no securement intermediate along the length thereof. Each hydraulic cylinder and each tower section is provided with means to couple the particular section or cylinder to the next adjacent section or cylinder so as to permit continued raising thereof.

REFERENCES:
patent: 990570 (1911-04-01), Lavery
patent: 2081248 (1937-05-01), Murphy
patent: 2595307 (1952-05-01), Selberg
patent: 2887191 (1959-05-01), Lovell
patent: 3095945 (1963-07-01), Mitchell
patent: 3099332 (1963-07-01), Marco et al.
patent: 3353686 (1967-11-01), Cowan
patent: 3398492 (1968-08-01), Nansel
patent: 3419157 (1968-12-01), Brady
patent: 3809249 (1974-05-01), Grove
patent: 3817007 (1974-06-01), Hall

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