Cast articulated tool

Details Cast articulated tool Cast articulated tool

1974-12-26

1976-06-29

Smith, Al Lawrence

Tools

Tool jaw

Crossed handles

B25B 708

Patent

active

039657795

ABSTRACT:
An articulated cutting tool, such as scissors, is formed by casting a first element with a pivot region, and casting a second element using the pivot region of the first element as the mold for the pivot region of the second element. The pivot regions of the elements are tapered, and in order to free the pivot joint, the pin is upset, for example by punching in the axial direction of the pin. The articulated element thus formed is coated with a hard coating material, and the cutting edges of the tool are ground to provide a sharp cutting edge for shearing action to which the layer of hard coating material extends. The invention is also adaptable to articulated tools, such as pliers, which do not have cutting edges, in which case the plating and grinding of the tool may be omitted.

REFERENCES:
patent: 1518251 (1924-12-01), Carlson
patent: 2577350 (1951-12-01), Morin
patent: 2690004 (1954-09-01), Crawford
patent: 3161085 (1964-12-01), Pratt

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