Boom articulation mechanism with, simultaneously operable, cylin

Details Boom articulation mechanism with, simultaneously operable, cylin Boom articulation mechanism with, simultaneously operable, cylin

1989-03-10

1991-05-21

Basinger, Sherman

Traversing hoists

Having means facilitating assembly or disassembly

Of traversing hoist from support

212187, 212261, 182 2, B66C 2342

Patent

active

050167677

ABSTRACT:
A boom articulation mechanism for interconnecting and displacing a pair of boom members. The mechanism comprises a connector link having a pair of opposed external boom pivot connections. Each of the booms has a pivot end connected spaced apart to a respective one of the external pivot connections. The connector link also has a pair of internal cylinder pivot connections spaced apart closer than the external pivot connections. The external boom pivot connections and the internal cylinder pivot connections are disposed on parallel axes spaced apart a distance not greater than the distance between the external boom pivot connections less the distance between the cylinder pivot connections. A first hydraulic cylinder is pivotally connected at one end to a first of the booms, and has a piston rod end connected to an associated one of the internal cylinder pivot connections. A second hydraulic cylinder is pivotally connected at one end to a second of the booms, and has a piston rod end connected to an associated one of the internal cylinder pivot connections. The cylinders and the booms are disposed in the same plane. A hydraulic circuit is provided for simultaneous synchronized operation of the cylinders to articulate one of the booms relative to the other along a common arc.

REFERENCES:
patent: 3108655 (1963-10-01), Troche
patent: 3108656 (1963-10-01), Asplundh
patent: 3235097 (1966-02-01), Ohman
patent: 4185427 (1980-01-01), Raymond
patent: 4461369 (1984-07-01), Amador
patent: 4534444 (1985-08-01), Smith
patent: 4602462 (1986-07-01), Anderson
patent: 4775029 (1988-10-01), MacDonald et al.

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