Power actuated lazy-tongs arrangement

Details Power actuated lazy-tongs arrangement Power actuated lazy-tongs arrangement

1975-10-07

1977-08-16

Scott, Samuel

Machine element or mechanism

Control lever and linkage systems

Elements

214146E, 214514, 214 82, 254122, G05G 104

Patent

active

040417999

ABSTRACT:
The mounting ends of one superimposed pair of base legs of a lazy-tongs arrangement are pivoted to fixed brackets, and the mounting ends of the other superimposed pair of base legs are mounted for both pivotal movement, and sliding movement relative to the fixed pivot brackets. The opposite ends of a bridge means are each connected with one superimposed pair of the base legs at a point between the mounting ends thereof and the scissors pivot pins connecting the central portions of the base legs, and the central portion of the bridge means is connected to the outer end of the power piston of a hydraulic cylinder. When the hydraulic cylinder is activated to move the power piston outwardly, the bridge means acts to exert force simultaneously on both superimposed pairs of base legs to thereby forcefully extend the lazy-tongs arrangement.

REFERENCES:
patent: 2176636 (1939-10-01), Meacham
patent: 2670867 (1954-03-01), Thompson
patent: 3106723 (1963-10-01), Carpenter
patent: 3700070 (1972-10-01), King
patent: 3788507 (1974-01-01), Voss
patent: 3885692 (1975-05-01), Anderson, Jr.

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