Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate
2000-07-05
2001-12-18
Hail, III, Joseph J. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
C081S062000
Reexamination Certificate
active
06330843
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a screwdriver, and more particularly to a ratchet screwdriver.
2. Description of the Related Art
As shown in
FIGS. 1 and 2
, a ratchet screwdriver
10
of the prior art comprises a handle
11
having a main body
12
which is provided at the front end with an axial hole
14
. A shaft
17
is received in the axial hole
14
such that a gear
15
of the shaft
17
is actuated by two anti-reverse plates
20
. A stop plate
19
is received in an insertion slot
18
of the main body
12
. The two anti-reverse plates
20
are provided with a dial knob seat
22
having two elastic press plates
21
. A housing
24
is provided with a position confining hole
23
and is fitted into the front end of the main body
12
such that a cut edge
25
of the housing
24
is retained by a projection
26
of the main body
12
. The main body
12
is provided at the front end with a locking member
28
having a receiving hole
27
into which the shaft
17
is slidably fitted. Such a prior art ratchet screwdriver as described above is rather complicated in construction and can not be easily assembled.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a ratchet screwdriver which is simple in construction and can be easily assembled.
The features and the advantages of the present invention will be 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: 5379873 (1995-01-01), Shiao
patent: 5642794 (1997-07-01), Chuang et al.
patent: 5910196 (1999-06-01), Huang
patent: 6186031 (2001-02-01), Shiao
patent: 6240810 (2001-06-01), Ho
Danganan Joni B.
Hail III Joseph J.
Harrison & Egbert
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