Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate
2000-06-20
2001-06-12
Meislin, D. S. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
C192S043200
Reexamination Certificate
active
06244139
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to tools and more particularly to an adjustable shifter for controlling the racing of a slidable ratchet shank which shifter is slidably shifting its direction in order to control the positive and/or inverse racing of the slidable ratchet bar.
Normally a shank of a screwdriver or a socket wrench is secured to a handle. Some of the shanks includes a ratchet bar which is controlled by a shifter can only racing on one direction.
FIGS. 1 and 2
show a ratchet socket wrench which comprises a handle
10
, a sleeve
12
and a chuck
13
. The handle
10
has a chamber
101
enabling to receive a ratchet
111
of the wrench
11
, a pair of pawls
112
and
113
and a positioning plate
14
. The sleeve
12
is wrapped on the chamber
101
of the handle
10
and secured by the chuck
13
. A shifter
121
slidably disposes in the top of the sleeve
12
to levelly actuate the pawls
112
and
113
which control the ratchet
111
racing on one direction. However, the socket wrench is fixed to the handle
10
, its length is therefore unadjustable.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide an adjustable shifter for controlling the racing of a slidable ratchet. The shifter is slidably engaged with the ratchet and an be readily rotated for 180 degrees to change the racing direction of the ratchet on a shank of a socket wrench which has a plurality of annular grooves spacedly formed on the body can be shifting about the chuck to change its length in the handle.
The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.
REFERENCES:
patent: 5642794 (1997-07-01), Chuang et al.
patent: 5910196 (1999-06-01), Huang
patent: 6148696 (2000-11-01), Chiang
patent: 6151995 (2000-11-01), Shu
patent: 6155144 (2000-12-01), Lin
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