Gardening shears

Details Gardening shears Gardening shears

2001-08-21

2004-04-27

Choi, Stephen (Department: 3724)

Cutlery

Cutting tools

Plural cooperating blades

C030S261000, C030S262000

Reexamination Certificate

active

06725547

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a pair of gardening shears, and more particularly to a pair of gardening shears which are provided with means to prevent the deposit of twigs between a movable blade and a fixed jaw plate of the gardening shears, and means to fix securely a pivoting joint so as to bring about effectively the scissors action of the gardening shears.
2. Description of Related Art
As shown in
FIG. 1
, a pair of gardening shears of the prior art comprise a first handle
11
, a second handle
13
, a movable blade
10
fastened at one end of the first handle
11
, a fixed jaw
12
fastened at one end of the second handle
13
, and a pivot
14
for fastening pivotally the movable blade
10
and the fixed jaw
12
in conjunction with a nut
15
and a pad
16
. A locating knob
17
is pivoted to the first handle
11
and is provided with a stop edge
18
. The nut
15
is provided with a toothed periphery
20
for engaging the teeth
21
of a toothed piece
19
, so as to fix the nut
15
. The fixed jaw
12
has a smooth planar side
22
opposite in location to the movable blade
10
.
The gardening shears of the prior art described above are defective in design because the toothed piece
19
is made by a special molding tool at an additional production cost, and because the toothed piece
19
is not effective in positioning the nut
15
. In addition, the locating knob
17
is not strong enough to withstand the pressure for a prolonged period of time, thereby undermining the service life span of the prior art gardening shears. In light of the friction between the planar side
22
of the fixed jaw
12
and the movable blade
10
, the twigs are apt to deposit between the blade
10
and the planar side
22
of the fixed jaw
12
, thereby resulting in the jamming of the blade
10
and the fixed jaw
12
.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a pair of gardening shears which are free of the shortcomings of the prior art gardening shears described above.
The foregoing objective of the present invention is achieved by the gardening shears comprising a blade and a fixed jaw plate fastened pivotally to the blade by a pivot in conjunction with a nut and a locating plate for positioning the nut. The fixed jaw plate is provided with a recessed edge serving to abate friction between the blade and the fixed jaw plate.
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: 838504 (1906-12-01), Hammond
patent: 1748701 (1930-02-01), Boyd
patent: 2295385 (1942-09-01), Connors
patent: 4809433 (1989-03-01), Maxwell et al.
patent: 5263254 (1993-11-01), Orthey
patent: 5483747 (1996-01-01), Thompson et al.
patent: 6260277 (2001-07-01), Wu
patent: 6453561 (2002-09-01), Chou

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