Coherent control device for folding knife, tool, etc.

Details Coherent control device for folding knife, tool, etc. Coherent control device for folding knife, tool, etc.

1988-07-11

1990-12-04

Yost, Frank T.

Cutlery

Sheathed

Pivoted blade

30156, 30158, 30160, B26B 100

Patent

active

049743236

ABSTRACT:
In a folding knife or tool having a handle and a blade pivotally connected to the handle, a control plate 28 slides in a shaped cavity 52 between handle plates 46,68, and swings, and also swings on, a crankpin 24 attached to the blade tang, and embodies a cam surface 36 at the distal end. A stem portion 30 of the control plate 28 protrudes to the surface of the handle whereby it may be manipulated by the user to cause the blade to open or close, and then to cause the cam surface 36 to engage a ramp 62 and spur 60 to thereby interpose a mechanical block to reverse blade rotation. Further pressure upon the stem 30 will then remove running clearances, tightening the blade solidly against wobble, and the control plate 28 against dislodgement.

REFERENCES:
patent: 23975 (1859-05-01), Belcher
patent: 543943 (1895-08-01), Minter
patent: 553430 (1896-01-01), Schmachtenberg
patent: 689513 (1900-12-01), Papendell
patent: 943990 (1909-12-01), Nell
patent: 947980 (1910-02-01), Romano
patent: 996231 (1911-06-01), Evens
patent: 1168633 (1916-01-01), Heywood
patent: 1319532 (1919-10-01), Rasmussen
patent: 1478260 (1922-12-01), Sibley
patent: 1743022 (1930-01-01), Carman
patent: 3002273 (1961-10-01), Merrit
patent: 4612706 (1986-09-01), Yunes
Peterson (pub.) "Petersen's Complete Book of Knives", 1988, pp. 18-23, "25 Yrs. of Lock-Back Folders", Steve Shackleford.

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