Control system for cage supported by articulated boom

Details Control system for cage supported by articulated boom Control system for cage supported by articulated boom

1981-08-10

1984-03-20

Machado, R. P.

Fire escape, ladder, or scaffold

Means maintaining platform level on angularly movable support

Swingable support

182 13, B66F 1104

Patent

active

044375433

ABSTRACT:
A control system for a personnel carrier attached to a boom which is displaceable by pressure fluid. The control system comprises at least one hand operable controlled handle axially rotatable in a limited clockwise or counter-clockwise direction to cause the boom to be elevated or lowered, respectively. A control valve is associated with the control handle and has at least one adjustable pressure fluid control component therein to control the displacement of the boom. A movable linkage is secured at one end to the control handle and at an opposed end to the fluid control component whereby rotation of the control handle causes displacement of the control component to regulate the pressure fluid which in turn controls the displacement of the boom.

REFERENCES:
patent: 2905262 (1959-09-01), Zwight
patent: 2940539 (1960-06-01), Richey
patent: 3066756 (1962-12-01), Broderson
patent: 3301346 (1967-01-01), Verrell
patent: 3360076 (1967-12-01), Stilwell
patent: 3483948 (1969-12-01), Thornton
patent: 3994365 (1976-11-01), Petermann
patent: 4044856 (1977-08-01), Stevenson
patent: 4113054 (1978-09-01), Myers
patent: 4290584 (1981-09-01), Eckels

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