Structure art design knife

Details Structure art design knife Structure art design knife

2003-02-26

2004-06-01

Watts, Douglas D. (Department: 3724)

Cutlery

Sheathed

Sliding blade

C030S125000, C030S340000

Reexamination Certificate

active

06742260

ABSTRACT:

BACKGROUND OF THE INVENTION
1) Field of the Invention
The invention herein relates to utility cutters and knives, specifically an improved structure art design knife that provides for stabler and safer manual grasping, the arrangement of which includes a front cover, a back cover, a hatch, a flat spring, and a blade holder mechanism. In addition to convenient blade replacement, the art design knife of the present invention contains a plurality of spare blades, thereby enhancing functionality and, furthermore, increasing practical value from a production standpoint.
2) Description of the Prior Art
In a conventional art design knife, frictional wear between the tensile pawl and the wave-profiled rack of the blade extension/retraction, mechanism often reduces overall structural rigidity such that blades cannot be consistently fixed into position, resulting in a greater risk of user injury. Moreover, the spare blades of a conventional art knife are typically situated external to the body of the knife. As such, considerable time is wasted searching for extra blades whenever a blade has to be replaced. Given the existent drawbacks of the conventional product and the need to overcome them, the applicant of the invention herein innovated an original solution and conducted extensive research based on design and other experience gained while engaged in the related industrial fields that culminated in the successful development of the improved structure art design knife of the invention herein.
SUMMARY OF THE INVENTION
The objective of the invention herein is to provide an improved structure art design knife in which the blade holder mechanism and the rack of the front cover and the back cover are of a balanced and stable arrangement to achieve blade positioning more effectively and safely and, furthermore, the present invention accommodates the internal storage of a plurality of spare blades, thereby integrating an extra blade supply within the body of the art design knife itself to further enhance blade replacement convenience and efficiency.
To enable the examination committee a further understanding of the means whereby the said objective is accomplished as well as the advantages, other objectives, and operation of the most preferred embodiment of the present invention, the brief description of the drawings below are followed by the detailed description of the invention herein.


REFERENCES:
patent: 6192589 (2001-02-01), Martone et al.
patent: 6276014 (2001-08-01), Lee
patent: 6374496 (2002-04-01), Hsu
patent: 6374497 (2002-04-01), Sun
patent: 6502311 (2003-01-01), Khachatoorian et al.
patent: 6513246 (2003-02-01), Ping
patent: 6574872 (2003-06-01), Roberts et al.

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