Structure for a locating pivot of shears

Details Structure for a locating pivot of shears Structure for a locating pivot of shears

2001-10-15

2003-07-29

Payer, Hwei-Siu (Department: 3724)

Cutlery

Cutting tools

Plural cooperating blades

C030S254000, C030S261000

Reexamination Certificate

active

06598300

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a pair of shears, and more particularly to a structure for pivoting two opposing blades of the shears.
2. Description of Related Art
As shown in
FIGS. 1 and 2
, a cutting device
10
of the prior art comprises two main bodies
11
and
12
, each having a blade
13
. The two opposing blades
13
are pivoted together by a pivoting structure
18
which is formed of a pivot
16
and a nut
17
, thereby enabling the two opposing blades
13
to work against each other. The pivoting structure
18
of the prior art device
10
is susceptible to impact by a foreign object, thereby resulting in the loosening of the pivoting structure
18
. As a result, the scissors action of two cutting edges of the two opposing blades
13
is seriously undermined.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a pair of shears with means to locate securely a pivoting structure of the shears, so as to overcome the deficiency of the prior art shears described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a cutting instrument comprising two handles, two working block, and a structure for pivoting the two working blocks together so that they work against each other to effect the scissors action. The pivoting structure comprises a pivot, a nut, and two locating slots which are disposed respectively in the two working blocks for locating the pivot and the nut so as to prevent the pivot and the nut from becoming loosened.
The features and the functions of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.


REFERENCES:
patent: 4031621 (1977-06-01), Arlett
patent: 4980975 (1991-01-01), Hodson
patent: 5483747 (1996-01-01), Thompson et al.
patent: 6367155 (2002-04-01), Homann
patent: 6418626 (2002-07-01), Jang

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