Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate
2002-12-06
2004-06-22
Wilson, Lee D. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
C081S063200, C081S058000, C081S061000, C081S062000, C081S177700, C081S177750, C081S177800
Reexamination Certificate
active
06752048
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a quick rotation wrench having an angle adjustment structure, and more particularly to a quick rotation wrench having an angle adjustment structure, wherein the included angle between the wrench body and the driving portion can be adjusted freely and arbitrarily.
2. Description of the Related Art
A first conventional quick rotation wrench
1
in accordance with the prior art shown in
FIGS. 1 and 2
comprises a driving portion
10
, a wrench body
16
, and a fixing shaft
13
. The driving portion
10
is formed with a combination recess
11
and a riveting hole
12
. The wrench body
16
is rotatably mounted on the driving portion
10
and is formed with a shaft hole
17
. The wrench body
16
has a flat end
161
. The fixing shaft
13
is mounted in the shaft hole
17
of the wrench body
16
and has a top formed with an enlarged head
14
and a bottom formed with a riveting end
15
riveted in the riveting hole
12
of the driving portion
10
. An elastic member
18
and a positioning ball
19
are embedded in the fixing shaft
13
. Thus, the wrench body
16
can be rotated on the driving portion
10
, and can be fixed on the driving portion
10
. However, the fixed angle between the wrench body
16
and the driving portion
10
only has five values as shown in
FIG. 2
, so that the first conventional quick rotation wrench
1
cannot satisfy the user's requirement.
A second conventional quick rotation wrench
2
in accordance with the prior art shown in
FIGS. 3 and 4
comprises a driving portion
20
, a wrench body
26
, and a fixing shaft
23
. The driving portion
20
is formed with a combination recess
21
and a riveting hole
22
. The wrench body
26
is rotatably mounted on the driving portion
20
and is formed with a shaft hole
27
and inner teeth
271
. The wrench body
26
has a semi-circular end
261
. The fixing shaft
23
is mounted in the shaft hole
27
of the wrench body
26
and has outer teeth
231
engaged with the inner teeth
271
of the wrench body
26
. The fixing shaft
23
has a top formed with an enlarged head
24
and a bottom formed with a riveting end
25
riveted in the riveting hole
22
of the driving portion
20
. An elastic member
28
and a positioning ball
29
are embedded in the fixing shaft
23
. Thus, the wrench body
26
can be rotated on the driving portion
20
, and can be fixed on the driving portion
20
. However, the fixed angle between the wrench body
26
and the driving portion
20
is limited in the range of 180 degrees as shown in
FIG. 4
, so that the second conventional quick rotation wrench
2
cannot satisfy the user's requirement.
SUMMARY OF THE INVENTION
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional quick rotation wrench.
The primary objective of the present invention is to provide a quick rotation wrench having an angle adjustment structure, wherein the included angle between the wrench body and the driving portion can be adjusted freely and arbitrarily.
Another objective of the present invention is to provide a quick rotation wrench having an angle adjustment structure, wherein the included angle between the wrench body and the driving portion can be adjusted easily and conveniently.
A further objective of the present invention is to provide a quick rotation wrench having an angle adjustment structure, wherein the control knob is mounted on the wrench body, so that the user can use his one hand to press the control knob and operate the wrench body easily and conveniently, thereby facilitating the user operating the quick rotation wrench.
In accordance with the present invention, there is provided a quick rotation wrench having an angle adjustment structure, comprising a driving portion, a wrench body, and an angle adjustment structure, wherein:
the driving portion has an inner wall formed with a shaft hole and a plurality of ratchet teeth;
the wrench body is rotatably mounted on the driving portion and has a shaft seat rotatably mounted in the shaft hole of the driving portion, the shaft seat of the wrench body has two opposite sides each formed with a receiving recess and a top formed with a receiving chamber communicating with the receiving recess; and
the angle adjustment structure is mounted on the shaft seat of the wrench body and includes two pawl members, and a control knob, wherein:
each of the two pawl members is pivotally mounted in the respective receiving recess of the shaft seat of the wrench body, each of the two pawl members has a first end formed with a plurality of locking teeth engageable with the ratchet teeth of the driving portion and a second end formed with a smooth face; and
the control knob is pivotally mounted in the receiving chamber of the shaft seat of the wrench body, and has a bottom formed with a protruding driving portion rested on an inner side of each of the two pawl members to urge and pivot each of the two pawl members.
REFERENCES:
patent: 3467231 (1969-09-01), Haznar
patent: 3532013 (1970-10-01), Haznar
patent: 5419221 (1995-05-01), Cole
patent: 5537899 (1996-07-01), Diedrich
patent: 6032555 (2000-03-01), Whitley
patent: 6216565 (2001-04-01), McCann
patent: 6457386 (2002-10-01), Chiang
Grant Alvin J.
Wilson Lee D.
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