Folding knife structure

Cutlery – Sheathed – Pivoted blade

Patent

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Details

B26B 104

Patent

active

044479514

ABSTRACT:
The folding knife structure of this invention is operable to present a blade member which is rigidly held so as to not be movable in any direction except upon great pressure to the folded condition. Our folding knife structure includes a handle assembly; a spring bias assembly connected to the handle assembly; and, a blade assembly pivotally connected to the handle assembly and operably connected to the spring bias assembly. The spring bias assembly includes a spring member having a main body connected to the handle assembly and, integral therewith, a guide portion which is engageable with the blade assembly. The blade assembly includes a blade member having a blade body; an alignment portion integral with the main blade body; and, a cutting edge integral with the main blade body. This invention lies in the contacting relationship of the guide portion of the spring member and the alignment or lock portion of the blade member so as to achieve a line contact therebetween. This line contact operates to rigidly hold the blade member in its opened position and automatically takes up for wear between the contacting surfaces.

REFERENCES:
patent: 199966 (1878-02-01), Elmer
patent: 1087342 (1914-02-01), Yerzley
patent: 1234345 (1917-07-01), Keeran
patent: 2304601 (1942-12-01), Schrade
patent: 4312128 (1982-01-01), Olsen

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