Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate
2001-08-23
2003-06-10
Meislin, D. S. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
C081S177850, C081S063000, C081S125100
Reexamination Certificate
active
06575059
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to a wrench, and in particular, a wrench which can be used with different size standards so as to release its carrying weight, reduce cost and increase its economic efficiency.
(2) Description of the Prior Art
A wrench relates generally to a tool used for dismantling studs or nuts. It comprises an open type, a hexagon type and a sleeve type. The different standards and combinations will solely depend on studs and nuts sizes as shown in FIG.
1
. The wrench has one end of he handle
10
formed into an open end
15
. The other end of the handle
10
is mounted with a ratchet sleeve module
20
, and a sleeve
21
is provided. The external edge of the sleeve
21
can cap a stud or a nut forms into a ratchet face
22
. The handle
10
relative to one internal edge of the ratchet sleeve
20
is provided with a retainer
23
which is placed into a smaller ratchet block
24
. The ratchet block
24
is supported behind with a spring element
25
. When the wrench is turning in a clockwise direction, the highest point of the ratchet block
24
can engage with the ratchet face
22
of the sleeve
21
so that the sleeve
21
can tun the stud or the nut. Otherwise, when the wrench is turned in the reverse; the ratchet face
22
of the sleeve
21
will push the ratchet block
24
to move towards a slightly larger side of the retainer
23
so that the sleeve
21
will not be restricted by the ratchet block
24
and it becomes an ineffective turn. Thus, it is convenient in operation for the user. However, the application for the conventional wrench as above mentioned currently has the following problems:
(a) Common Use Being Poor
The current wrench, whether it relates to the open end
15
or the sleeve
21
, has a fixed size standard, and is unable to make any change. Therefore, the user must carry a number of modules and different size standards of wrenches when in application. It will increase the expenses and the weight to carry for the user. Moreover, if any one end of the wrench is damaged then a completely new wrench is required.
(b) Lesser Torsion Force
The current ratchet block
24
is engaged with a ratchet face
22
of the sleeve
21
which is restricted by an arc protrusion design of the ratchet block
24
. Whenever the wrench is tuning, the sleeve
21
and the ratchet block
24
can only provide a single engagement. It is very obvious that its torque is not strong enough which always causes damage to the ratchet lace
22
or the ratchet block
24
, and will increase the frequency of repairing and changing.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide the following technical means to achieve the above-mentioned purpose. The wrench has two ends of the handle being separately mounted with an open jaw module and a sleeve module, wherein the open jaw module has the end protrusion of the handle relatively provided with a smaller path of an insert lever, and an open jaw is mounted. The end of the open jaw is relatively formed into an insert recess of the insert lever.
The sleeve module has another end of the handle to form into a collar. The internal diameter of the bottom edge protrusion of the collar has a resist edge. The collar is provided wit the resist edge to be placed and is mounted with an external circumference of the ratchet face of the sleeve. The handle corresponds to the internal diameter of the collar formed into a joint to the crescent recess. Behind the crescent recess a retainer is also extended; and the crescent recess is mounted within a crescent ratchet block. The crescent ratchet block corresponds to the engaging gear and the curving of the ratchet face. The crescent ratchet block and the bottom edge of the retainer are secured with a recovery spring Therefore, the user will change the appropriate standard of the open jaw or the sleeve depending on his or her requirement Further, it can improve its sleeve torque and reduce its damages.
REFERENCES:
patent: 1350315 (1920-08-01), Katzmarek
patent: 2636411 (1953-04-01), Wood
patent: 4562757 (1986-01-01), Furey
patent: 6006632 (1999-12-01), Hsieh
patent: 6050165 (2000-04-01), Hall
patent: 6336382 (2002-01-01), Cerda
Lei Leong C.
Meislin D. S.
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