Locking device for folding knife, tool, etc.

Cutlery – Sheathed – Pivoted blade

Patent

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Details

30160, 30154, B26B 104, B26B 102, B26B 100

Patent

active

052936902

ABSTRACT:
In a folding knife or hand tool having a handle and a blade pivotally connected to the handle, a spring loaded crossbolt 1 is fitted to the blade tang. One end of crossbolt 1 protrudes through an arcuate slot in the handle, crossbolt slot 32. A locking collar 19 on crossbolt 1 engages locking counterbores A 34 and B 36 located on the blade side of the opposite ends of crossbolt slot 32. When finger pressure is applied to the end of crossbolt 1, locking collar 19 is forced to disengage locking counterbore A 34 and retreat to a relieved area on the blade, collar relief 52. This permits the blade to be extended by forward finger pressure on crossbolt 1. When the blade is fully extended, spring pressure forces locking collar 19 into the opposite locking counterbore B 36, thus locking the blade. Reversing the sequence will close and lock the blade.

REFERENCES:
patent: 23975 (1859-05-01), Belcher
patent: 543943 (1895-08-01), Minter
patent: 553430 (1896-01-01), Schmachtenberg
patent: 749230 (1904-01-01), Severance
patent: 947980 (1910-02-01), Romano
patent: 1478260 (1922-12-01), Sibley
patent: 4133106 (1979-01-01), Addis
patent: 4356631 (1982-11-01), Guth
patent: 4535539 (1985-08-01), Friedman et al.
patent: 4551917 (1985-11-01), Walker
patent: 4612706 (1986-09-01), Yunes
patent: 4974323 (1990-02-01), Cassady

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