Clasp knife

Details Clasp knife Clasp knife

2002-10-11

2004-05-04

Ashley, Boyer D. (Department: 3724)

Cutlery

Sheathed

Pivoted blade

C030S155000, C030S342000, C030S157000

Reexamination Certificate

active

06729029

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a clasp knife, and more particularly to a knife of which a blade is safely locked in a handle and will not freely pivot in an undesired manner.
2. Description of Related Art
Referring to
FIGS. 6 and 7
, a conventional clasp knife includes a handle (
60
) being composed of a first part (
61
) and a second part (
62
) assembled together, and a blade (
70
) pivotally mounted on the handle (
60
). A pivot pin (
63
) is provided on the second part (
62
) of the handle (
60
), by which an installed portion (
71
) of the blade (
70
) is pivotally mounted between the first part (
61
) and the second part (
62
).
The blade (
70
) has a cutting edge and a back opposite to the cutting edge. A lug (
72
) is formed on a top surface and adjacent the back of the blade (
70
). When the blade (
70
) is received in the handle (
60
), the lug (
72
) is located outside the handle (
60
), by which a user can extend the blade (
70
) very easily.
A flexible sheet (
64
) is mounted on the second part (
62
), and has a free end (
641
) adjacent the pivot pin (
63
) and a fixed end (not numbered) secured on the second part (
62
). The blade (
70
) has a notch (
73
) defined at a rear end thereof. When the blade (
70
) is extended, the free end (
641
) is erected to locate in the notch (
73
), and presses against the installed portion (
71
) to prevent the blade (
70
) from freely pivoting.
A protrusion (
65
) is formed on the flexible sheet (
64
) and positioned in a recess (
74
) defined on a bottom surface of the blade (
70
) when the blade (
70
) is received in the handle (
60
), so that the blade (
70
) is fastened in the handle (
60
) and cannot freely pivot.
However, by only using the protrusion (
65
) positioned in the recess (
74
), the blade (
70
) cannot surely fastened in the handle (
60
) and may freely pivot out to injure a user.
Therefore, the invention provides a clasp knife to mitigate and/or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main objective of the invention is to provide a clasp knife of which a blade can be surely fastened in a handle and will not freely pivot without an operation of a user.


REFERENCES:
patent: 1603914 (1926-10-01), Hermann
patent: 4148140 (1979-04-01), Lile
patent: 4893409 (1990-01-01), Poehlmann
patent: 5092045 (1992-03-01), Boyd et al.
patent: 5822866 (1998-10-01), Pardue
patent: 5915792 (1999-06-01), Sakurai
patent: 6079106 (2000-06-01), Vallotton
patent: 6105255 (2000-08-01), Cheng
patent: 6397477 (2002-06-01), Collins
patent: 6430816 (2002-08-01), Neveux
patent: 2002/0104220 (2002-08-01), Marfione
patent: 2002/0157260 (2002-10-01), Cheng
patent: 2003/0070299 (2003-04-01), Frazer

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