Mobile lifting apparatus

Details Mobile lifting apparatus Mobile lifting apparatus

1986-03-19

1988-08-16

Peters, Jr., Joseph F.

Traversing hoists

Having counterweight or counterbalancing means

212218, B66C 2372

Patent

active

047638001

ABSTRACT:
A mobile lifting apparatus has a chassis with front driving wheels and steerable rear wheels. A vertical mast comprised of a pair of extendible hydraulic cylinders is spacedly mounted on the front of the chassis. One or more jam stay cylinders are mounted on the chassis rearwardly of the vertical mast. A pair of extendable booms are mounted on the vertical mast and jam stay cylinders. The load may be attached to the end of the booms. A hydraulic or other power supply extends and retracts the boom and drives the driving wheels. A counterweight is mounted on the rear of the chassis and the chassis may be extended to increase the capacity and stability of the lifting apparatus.

REFERENCES:
patent: 2130487 (1938-09-01), Foley
patent: 2368268 (1945-01-01), Spiegel
patent: 2916172 (1959-12-01), Locke
patent: 3081883 (1963-03-01), Minty
patent: 3547278 (1970-12-01), Tayler
patent: 3642148 (1972-02-01), Durand
patent: 3851776 (1974-12-01), Layrat
patent: 4502569 (1985-03-01), Loechner
patent: 4573853 (1986-03-01), Lorenz

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