Tools – Wrench – screwdriver – or driver therefor – Slidable jaw adjustments
Reexamination Certificate
2000-09-22
2002-01-08
Smith, James G. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Slidable jaw adjustments
C081S126000, C081S157000
Reexamination Certificate
active
06336384
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an adjustable wrench which is able to change the one-way-wrenching direction of the adjustable wrench during repeated wrenching operation for a work piece.
FIGS. 11 and 12
show a conventional adjustable wrench
8
having a main body
81
. A jaw section
82
extends from one side of the main body
81
, while a grip
83
is pivotally disposed at the other end of the main body
81
. A slidably movable jaw
84
is disposed in a slide way
811
of the main body
81
. The movable jaw
84
has a push block
841
protruding out of the main body
81
. One side of the front end of the grip
83
inside the main body
81
has a driving section
831
for pushing and driving a slide block
85
to disengage a toothed section
851
thereof from or engage the toothed section
851
with a toothed section
842
of the movable jaw
84
. When the grip
83
is wrenched clockwise in a direction of the figure, the slide block
85
is driven to engage with the movable jaw
84
and the jaw section
82
of the main body
81
and the movable jaw
84
cooperatively clamp a work piece
9
(such as a bolt and a nut) and rotate the same. When the grip
83
is counterclockwise wrenched, the slide block
85
is moved away from the movable jaw
84
. Therefore, when the main body
81
is driven by the grip
83
, the movable jaw
84
will be forced away by the work piece
9
to idle, whereby when repeatedly wrenching the adjustable wrench
8
, the work piece
9
can be only one-way rotated.
The work piece
9
can be one-way rotated by means of repeatedly wrenching the above adjustable wrench
8
. However, when it is necessary to reversely rotate the work piece
9
, (for example, in order to control the nut and bolt to have unified pre-load, the nut is often first tightened and then untightened by one third cycle) a user needs to take up and separate the adjustable wrench
8
from the work piece
9
and re-adjust the position of the movable jaw
84
and then reversely fit the adjustable wrench
8
onto the work piece
9
so as to reversely wrench the work piece
9
. Such procedure is quite troublesome. In the case that the work piece
9
is a bolt for adjustment, the user will have to continuously repeat the above procedure to adjust the work piece
9
.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide an adjustable wrench in which the projecting rail of the movable jaw and the projecting section of the slide block are together inlaid in the slide channels of the main body. A bolt is passed through the concave face of the movable jaw and the semicircular groove of the slide block with the bolt screwed with the thread of the concave face for driving the movable jaw to move along the slide channels. A movable retaining block is disposed on one side of the top end of the grip opposite to a leaning section of the slide block. The retaining block can be switched, whereby when the grip is wrenched in different directions, the retaining block abuts against and pushes the leaning section of the slide block so as to move the movable jaw toward the jaw section of the main body for clamping and wrenching a work piece. When the retaining section does not abut against and the leaning section and the grip is wrenched, the slide block and the movable jaw are shifted by the work piece to make the main body idle. By means of switching the retaining block, the one-way wrenching direction of the adjustable wrench during repeated wrenching operation for the work piece can be changed.
The present invention can be best understood through the following description and accompanying drawings wherein:
REFERENCES:
patent: 2562060 (1951-07-01), Pehrsson
patent: 3349654 (1967-10-01), Nordgren
patent: 3407689 (1968-10-01), Slayton
LandOfFree
Adjustable wrench does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable wrench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable wrench will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2825381