Method and apparatus for raising and lowering a telescoping mast

Details Method and apparatus for raising and lowering a telescoping mast Method and apparatus for raising and lowering a telescoping mast

1985-06-24

1986-07-08

Perham, Alfred C.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52115, 52116, 52119, 52741, E04H 1218, E04H 1210

Patent

active

045985090

ABSTRACT:
Method and apparatus for raising and lowering a telescoping mast. A telescoping mast having an upper section slidably received within a lower section is pivotally connected to a base in a horizontal position. A line is connected to the lower end of the upper section and is placed over a pulley mounted on the upper end of the lower section and secured to the base. Upward pivoting of the lower section moves the mast to a vertical position while the upper section is extended by action of the line. Lowering the mast from the vertical position causes contraction of the upper section into the lower section.

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patent: 3388810 (1968-06-01), Durand
patent: 4021978 (1977-05-01), Busse et al.
patent: 4269395 (1981-05-01), Newman et al.

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