Automatic opening and closing knife

Details Automatic opening and closing knife Automatic opening and closing knife

2007-12-11

2007-12-11

Payer, Hwei-Siu C. (Department: 3724)

Cutlery

Sheathed

Sliding blade

C030S163000

Reexamination Certificate

active

11341008

ABSTRACT:
An out-the-front automatic knife incorporates dual locking and release mechanisms that define a three-point blade-handle interconnection between the blade and the handle when the blade is locked in the open position. A single trigger is operable to automatically open the knife, and to automatically close the knife. Separate firing and retraction springs may be provided with different spring strength to vary the speed and strength of the blade moving to the open position, and to the closed position. Blade guide systems cause the blade to travel longitudinally and linearly. The handle substantially encloses the blade and incorporates an access port to facilitate cleaning and maintenance of components housed in the handle interior.

REFERENCES:
patent: 174417 (1876-03-01), Evans
patent: 472104 (1892-04-01), Von Bultzingslowen
patent: 475306 (1892-05-01), Franklin
patent: 515743 (1894-03-01), Von Bultzingslowen
patent: 845792 (1907-03-01), Jenkins
patent: 1024749 (1912-04-01), Sjoberg
patent: 1453897 (1923-05-01), Franz
patent: 1859158 (1932-05-01), Pernek, Sr.
patent: 2260141 (1941-10-01), Hanle
patent: 4265017 (1981-05-01), Collins
patent: 4926555 (1990-05-01), Lemaire
patent: 5371948 (1994-12-01), Liffiton
patent: 2006/0207102 (2006-09-01), Bezold et al.
A series of 10 photographs of an OTF knife, assembled and disassembled, knife circa 2000.

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