Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent
1985-12-30
1987-03-03
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Means maintaining platform level on angularly movable support
Swingable support
212238, 212266, B66F 1104
Patent
active
046468757
ABSTRACT:
This invention relates to an articulated boom structure (10) which comprises a pedestal (11) mounted for rotation on a main frame (12) mounted in turn on a vehicle (13), with a first boom (14) articulately mounted on the pedestal (11) and adapted to be raised and lowered relative to the pedestal (11), a platform (16) mounted on the outer end of the first boom (14) and adapted to be held in a horizontal plane at all times, a sweep arm (17) connected to the platform (16) above a ring gear (18) rotatably mounted on the platform (16), the sweep arm (17) movable in a horizontal plane at all times, a second boom (19) articulately connected to the outer end of the sweep arm (17) and adapted to be raised and lowered relative thereto, a third boom (21) articulately connected to the outer end of the second boom (19) and adapted to be raised and lowered relative thereto, and a personnel carrier mounted on the third boom (21), which carrier may be either a bucket (22) or a work platform (23); and with a bucket (22) movable to a vertical position relative to the third boom (21).
REFERENCES:
patent: 3262517 (1966-07-01), Malec
patent: 3498474 (1970-03-01), Pierce
patent: 4074790 (1978-02-01), Colbachini
patent: 4461369 (1984-07-01), Amador
Machado Reinaldo P.
Paxton-Mitchell Company
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