Cutlery – Sheathed – Pivoted blade
Reexamination Certificate
2002-10-23
2004-10-19
Goodman, Charles (Department: 3724)
Cutlery
Sheathed
Pivoted blade
C030S155000, C007S118000
Reexamination Certificate
active
06804887
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to foldable knifes and more particularly to a foldable knife having a double blade with improved characteristics.
BACKGROUND OF THE INVENTION
A conventional foldable knife is shown in
FIGS. 1A and 1B
. A blade
1
of the knife tends to loosen or even deform after a long period of time of use. As a result, a gap
21
is formed between the parallel blade
1
and a handle
2
of the knife when the blade
1
has been rotated back to the handle
2
to a closed position. Thus, a tight engagement of the received blade
1
and the handle
2
is impossible. In other words, there is no support of the blade
1
by the handle
2
in this position. Also, the hand of a user tends to be hurt by the sharp blade
1
if a sufficient care is not taken while holding, taking or carrying the knife. Further, the blade
1
itself may be damaged as contacting other objects. Furthermore, in a case that the knife is stored together with other objects, a pointed or flat object tends to insert into the gap
21
. Such insertion can gradually enlarge the gap
21
as time goes. And in turn, the above loosening or deformation of the blade
1
may be worse. As an end, the possibility of hurting persons by the knife is increased.
For solving the problem of the well known knife, the inventor of the present application had invented a foldable knife having a single blade. Further, a Taiwanese Utility Model Patent No. 154,901 having the same title was granted to the present inventor by IPO (Intellectual Property Office) of Taiwan Government. The utility model patent is shown in FIG.
2
. As illustrated, the foldable knife
3
comprises a flat handle
30
, a blade
31
pivotably coupled to a forward end of the handle
30
, a central opening through the handle
30
, and a resilient piece
32
at a resilient piece
32
at a lower side of the handle
30
, the resilient piece
32
having an upward slightly curved end so as to possess an elastic force in a bent state. At the curved end, a stop
33
is formed. The stop
33
is engaged with a rear end
311
of the blade
31
when the blade
31
is fully extended. At this time, the blade
31
is locked in an opened position. There is further provided an elongated protective element
34
along an edge of the handle
30
. The protective element
34
has a predetermined height sufficient to prevent a cutting edge
312
of the blade
31
from contacting a foreign object when the blade
31
is in its closed position. As such, the protective element
34
can protect the user's hand (i.e., prevent it from touching the cutting edge
312
) while holding, taking, or carrying the knife
3
. Further, other objects can also be prevented from contacting the cutting edge
312
when they are stored together with the knife
3
. Furthermore, with the provision of the protective element
34
, the cutting edge
312
of the blade
31
can be prevented from being damaged by other objects.
It is understood that there is no end of the progress of technology. Also, more people demand high quality, ergonomic, multi-functional, convenient, and personalized products as time evolves. Hence, continuing improvements in the foldable knife are still constantly being sought.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a foldable knife comprising a flat handle and two opposite blades pivotably coupled to forward and rear ends of the handle respectively. The handle includes two resilient pieces on two opposite sides, each resilient piece being capable of being pressed by a hand of a user to fold or resilient piece is urged against a rear end of the blade for locking the blade in a closed or opened position. The knife further comprises a protective element disposed on the handle. The protective element has a height sufficient to prevent the cutting edges of the blades from contacting the hand of the user when the blades are in the closed position. Hence, the protective element can prevent the user's hand from being hurt by the cutting edges while taking or carrying the knife. Further, other objects can also be protected (i.e., prevent they from being hurt by the cutting edges) when they are stored together with the knife. Furthermore, with the provision of the protective element, the cutting edges itself can be prevented from being damaged by other objects. By utilizing this foldable knife having a double blade, it is possible of overcoming the above drawbacks of the prior art.
Another object of the present invention is to provide a foldable knife having a double blade wherein one blade has a sharp cutting edge and the other blade has a series of sharp teeth in its edge. With the variety of cutting edges, the foldable knife of the present invention can be readily adapted to applications.
The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
REFERENCES:
patent: 48194 (1865-06-01), Mayland
patent: 313414 (1885-03-01), Freund
patent: 521555 (1894-06-01), Scheerer
patent: 589737 (1897-09-01), Miller
patent: 589738 (1897-09-01), Miller
patent: 988068 (1911-03-01), Beardsley et al.
patent: 1194486 (1916-08-01), Downs
patent: 1644705 (1927-10-01), Belcher
patent: 2718695 (1955-09-01), Elsener
patent: 4078272 (1978-03-01), Mahon, III
patent: D302649 (1989-08-01), Porsche et al.
patent: 5857268 (1999-01-01), Park
patent: 5933893 (1999-08-01), Padden
patent: 6101722 (2000-08-01), Cheng
patent: 6101724 (2000-08-01), Halligan
patent: D436014 (2001-01-01), Glesser
patent: 6715209 (2004-04-01), Taylor et al.
Bacon & Thomas PLLC
Goodman Charles
Kantas Products Co., Ltd.
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