Wrench structure

Details Wrench structure Wrench structure

2001-01-26

2002-01-08

Smith, James G. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S177900, C081S177200

Reexamination Certificate

active

06336383

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention is related to an improved wrench structure in which a main body, a pivot block, a projecting block and a grip are pivotally connected with each other, enabling the wrench to be bent about multiple axis to have various configurations for easy use in different limited space conditions.
FIG. 7
shows a conventional wrench having a head section
81
in which a ratchet mechanism
9
is disposed. The head section
81
is pivotally connected with a thread section
83
of a grip
82
. A thread bush
84
is screwed on the thread section
83
. One end of the head section
81
adjacent to the grip
82
is formed with three engaging faces
811
,
812
,
813
with different angles. After the thread bush
84
is tightened, the thread bush
84
is engaged with any of the engaging faces
811
,
812
,
813
, whereby the head section
81
can be located at three different bending angles.
According to the above structure, each time the angle of the grip
82
is adjusted, it is necessary to untighten and tighten the thread bush
84
. Such procedure is quite troublesome. Furthermore, the grip
82
and the head section
81
are only provided with one bendable pivot section so that the wrench still cannot be conveniently used.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide an improved wrench structure in which a main body, a pivot block, a projecting block and a grip are pivotally connected with each other. A first engaging mechanism is provided to control the main body to be engaged with the pivot block and located at different angles from the pivot block. A locating unit is provided to control the projecting block to engage with or disengage from pivot block to be free to rotate. After the grip is pivotally rotated to contain different angles with the pivot block, a second engaging mechanism serves to locate and fix the grip with the pivot block. Accordingly, the wrench is bendable about multiple axes to have various configurations for easy use in different limited space conditions.
The present invention can be best understood through the following description and accompanying drawings wherein:


REFERENCES:
patent: 1380643 (1921-06-01), Eagle
patent: 2886998 (1959-05-01), Scott
patent: 3023652 (1962-03-01), Feldman
patent: 3186265 (1965-06-01), Wenturine et al.
patent: 3839929 (1974-10-01), Richards
patent: 5996448 (1999-12-01), Suekage
patent: 6000299 (1999-12-01), Cole
patent: 6101907 (2000-08-01), McGovern et al.
patent: 6138533 (2000-10-01), Turtle
patent: 6216567 (2001-04-01), Hu
patent: 6220125 (2001-04-01), Lan
patent: 6247386 (2001-06-01), Gummow

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