Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
1999-08-17
2001-04-17
Morgan, Eileen P. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
Reexamination Certificate
active
06216569
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cabinet tip of a slotted screwdriver having improved engagement with a slot of a fastener.
2. Description of the Related Art
A typical slotted screwdriver includes a cabinet tip for engaging with a slot on a fastener (e.g., a screw). Nevertheless, a slotted screw screwdriver often can only be used for driving a fastener of a certain slot size. If the slot is too large for the cabinet tip, the screwdriver is apt to be disengaged from the fastener. If the user forcibly inerts the cabinet tip into a slot that is too narrow for the cabinet tip, the slot wall will be damaged.
Referring to
FIG. 1
of the drawings, in actual use of a slotted screwdriver
70
, the slot
161
of the fastener
16
to be tightened or loosened might have an alien object (e.g., a small particle)
60
such that the cabinet tip
71
cannot be in fitting contact with the slot walls. As a result, the driving torque is insufficient and the driving is not smooth. Even if the slot
161
of the fastener
16
has no alien object therein, the user must be cautious to avoid inclination of the screwdriver
70
shown in FIG.
2
. More specifically, the cabinet tip
71
tends to disengage from the slot
161
during driving if the side wall
72
of the cabinet tip
71
is not at a right angle with the bottom wall of the slot
161
. However, inclination of the screwdriver
70
is inevitable in some cases, e.g., the fastener
16
is located in a place difficult to access and operate.
The present invention is intended to provide an improved slotted screwdriver that mitigates and/or obviates the above problems.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide an improved cabinet tip of a slotted screwdriver having improved engagement with a slot of a fastener.
It is another object of the present invention to provide an improved cabinet tip of a slotted screwdriver for driving fasteners of different slot sizes.
A cabinet tip for a screwdriver in accordance with the present invention comprises a drive tip end and a neck area below the drive tip end. The neck area includes a bottom wall adapted to engage with a side wall defining a slot of a fastener to be driven when the cabinet tip is in an inclined status relative to the fastener. The drive tip includes two flat or arcuate lateral surfaces. The drive tip end includes an arcuate top face.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
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patent: 1899489 (1933-02-01), Wickbergh
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patent: 3897812 (1975-08-01), Arnn
patent: 3923088 (1975-12-01), Arnn
patent: 4105056 (1978-08-01), Arnn
patent: 4625598 (1986-12-01), Wolfram
patent: 4873900 (1989-10-01), Ciumaga
patent: 4878406 (1989-11-01), Simpson et al.
patent: 4955936 (1990-09-01), Douglas
patent: 5317940 (1994-06-01), Shun'ko
Danganan Joni B.
Kamrath Alan
Morgan Eileen P.
Rider Bennett Egan & Arundel LLP
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