Cutlery – Cutting tools – Plural cooperating blades
Reexamination Certificate
2001-08-24
2002-05-28
Payer, Hwei-Siu (Department: 3724)
Cutlery
Cutting tools
Plural cooperating blades
C030S341000
Reexamination Certificate
active
06393703
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 handle confining structure of the gardening shears.
2. Description of Related Art
As shown in
FIGS. 1-3
, a pair of prior art gardening shears is provided with a handle rotating structure which comprises a rotary handle
10
, a shaft rod
11
, and a recovery spring
18
. The shaft rod
11
is provided at the lower end with a locating slot
12
. The handle
10
is provided with an engagement hole
13
corresponding in location to the locating slot
12
of the shaft rod
11
. The handle
10
is provided in the upper segment with a longitudinal hole in communication with the engagement hole
13
. The shaft rod
11
is provided at the upper end
15
with a protruded pillar
16
. The handle
10
is provided at the upper end with an arcuate slot
17
in which the recovery spring
18
is disposed. The shaft rod
11
is received in the longitudinal hole of the handle
10
such that the protruded pillar
16
of the shaft rod
11
is received in the arcuate slot
17
of the handle
10
, and that a bolt
14
is located in the locating slot
12
of the shaft rod
11
via the engagement hole
13
of the handle
10
. As the handle
10
is turned, the recovery spring
18
is compressed by the protruded pillar
16
. The handle
10
is forced by the spring force of the compressed recovery spring
18
to return to its original position. The protruded pillar
16
is frequently subjected to a lateral shear force and is therefore vulnerable to severance or damage. In addition, the recovery spring
18
is disposed in the arcuate slot
17
of the handle
10
in such a manner that one end of the recovery spring
18
is stopped by the inner wall of one end of the arcuate slot
17
, and that other end of the recovery spring
18
urges the protruded pillar
16
of the shaft rod
11
. Such an arrangement of the recovery spring
18
in the arcuate slot
17
makes the assembly of the prior art gardening shears difficult and costly.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a pair of gardening shears with an efficient and cost-effective structure for confining the rotational angle of a primary handle of the gardening shears.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a rotation confining structure which is intended to confine the rotational angle of the primary handle and is formed of a position confining edge of a shaft rod of the primary handle, and a locating member of a rotary grip of the primary handle. The rotation confining effect is brought about by the position confining edge of the shaft rod and two inclined planes of the locating member of the rotary grip, without the use of the recovery spring.
The features and the advantages 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: 3906630 (1975-09-01), Megna
patent: 5659959 (1997-08-01), Parlowski
patent: 5781999 (1998-07-01), Chang
patent: 5787589 (1998-08-01), Auderset
patent: 6260277 (2001-07-01), Wu
Harrison & Egbert
Jiin Haur Industrial Co., Ltd.
Payer Hwei-Siu
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