Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Reexamination Certificate
2000-07-27
2001-09-18
Smith, James G. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
C081S124300, C081S125100, C081S186000
Reexamination Certificate
active
06289772
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a speed wrench which has three recesses separated by two pushing portions one of which is a flat side and the other pushing portion is composed of two surfaces with an angle defined therebetween.
BACKGROUND OF THE INVENTION
A conventional open ended wrench is shown in FIG.
1
and generally includes a shank
10
with two open ends
11
each of which includes two jaws between which a recess
12
is defined. The recess
12
is defined by two pushing sides
13
so that a hexagonal object can be received in between the two jaws and two sides of the object contact the two pushing sides
13
. When rotating the wrench, the object is rotated by the two pushing sides
13
and a peak of the hexagonal object is engaged with the recess
12
. However, the user has to remove the wrench from the object and engage the object repeatedly to tighten or loosen the object. This is inconvenient for the user to smoothly operate the wrench because it takes too much time to remove the open end from the object and to engage the open end with the object.
The present invention intends to provide a wrench with an open end which has two jaws one of which has an inclined surface and each jaw has a recess defined in an inside thereof. A through recess is defined in a throat portion of the open end and a pushing side connected between the throat recess and one recess in one jaw, and a 120-degree corner is connected between the throat recess and the other recess in the other jaw. The wrench of the present invention can rotate an object reciprocally without removing the wrench from the object.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a speed wrench and comprising a shank having an open end on an end of the shank and the open end having a throat portion connected to the shank. A first jaw and a second jaw respectively extend from the throat portion. The first jaw has a first flat surface defined in an inside thereof and the second jaw has a second flat surface defined in an inside thereof. A throat recess is defined in the throat portion and located between the first jaw and the second jaw. A first recess is defined in the inside of the first jaw and a second recess is defined in the inside of the second jaw. An end of a periphery defining the second recess is connected to the second flat surface. A first pushing side is connected between the first flat surface and an end of a periphery defining the first recess, and a second pushing side is connected between an end of a periphery defining the throat recess and the other end of the periphery defining the first recess. A third pushing side is defined in the inside of the second jaw and extends from the other end of the periphery defining the throat recess. A fourth pushing side is connected between the third pushing side and the other end of the periphery defining the second recess. A 120-degree angle defined between the third pushing side and the fourth pushing side. A length of the third pushing side equals to two third of a side of a hexagonal object engaged with the open end and a length of the fourth pushing side equals to one third of a side of a hexagonal object engaged with the open end of the wrench.
The object of the present invention is to provide a wrench that holds a hexagonal object securely and can reciprocally rotate the object without removing the open end from the object.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
REFERENCES:
patent: 3242775 (1966-03-01), Hinkle
patent: 3620107 (1971-11-01), Evans
patent: 3757614 (1973-09-01), Evans et al.
patent: 3762244 (1973-10-01), Evans
patent: 3875828 (1975-04-01), Evans
Baxley Charles E.
Smith James G.
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