Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Handle – handle component – or handle adjunct – Handle with ergonomic structure enhancements such as...
Reexamination Certificate
1999-12-27
2001-04-17
Browne, Lynne H. (Department: 3629)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Handle, handle component, or handle adjunct
Handle with ergonomic structure enhancements such as...
C016S900000, C403S084000
Reexamination Certificate
active
06216317
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a handle, and more particularly to a handle which can be precisely adjusted in its locating angle.
BACKGROUND OF THE INVENTION
The do-it-yourself (DIY) hand tools are becoming popular among the consumers at large. In order to enhance the competitiveness of the hand tools, the makers of the hand tools center their reseach and development on the improvement on performance of the handle of the hand tools. As shown in
FIG. 1
, a prior art handle
1
is provided at the front end thereof with a slot
11
which is pivoted with a protrusion
21
of the driver rod
2
. Located in the proximity of the slot
11
is a through hole
12
which is provided in one side of the inner wall thereof with a hole
13
in which a spring
14
and a steel ball
15
are disposed. The through hole
12
is provided in other side of the inner wall thereof with a stepped hole
16
in communication with the slot
11
for disposing an urging block
17
which has an inclined plane
171
. A control rod
3
is disposed in the through hole
12
such that the control rod
3
is engaged with a steel ball
15
received in an arcuate slot
31
, and that the inclined plane
171
of the urging block
17
is engaged with another arcuate slot
32
. When one end of the control rod
3
is pressed to displace downward, the straight rod section urges the inclined plane
171
of the urging block
17
to confine the driver rod
2
. When other end of the control rod
3
is pushed upward, the inclined plane
171
of the urging block
17
is received in the arcuate slot
32
, so as to cause the urging block
17
to withdraw. As a result, the application angle of the handle
1
can be adjusted. Such a prior art design as described above results in inconvenience in assembly and use of the handle
1
. For example, before the control rod is disposed in the through hole of the handle to confine the steel ball and the urging block, the steel ball is urged by the spring to move out. In the meantime, if the head end of the handle is pushed upward, the urging block falls on the floor. On the contrary, if the steel ball falls on the floor, the assembly of the elements of the locating structure is relatively difficult. If the control rod sways in the midst of the use of the handle, the steel ball is retracted along the arcuate slot, thereby resulting in the release of the control rod as well as the withdrawal of the urging block. As a result, the handle can not be located. In addition, there is no temporary support between the handle and the driver rod, the user must use one hand to support the driver rod while adjusting the application angle of the handle.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a handle capable of being adjusted and located in the application angle thereof.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a handle, which is provided at the front end thereof with a receiving slot which is in turn provided therein with an inner hole for receiving an urging block. The urging block is provided in the interior thereof with a horizontal long slot having a front inclined plane such that the top of front end thereof is extended into the receiving slot. The handle is further provided with a through hole in communication with the inner hole for receiving a press rod and a spring. The press rod has a straight section, which is put through the horizontal long slot of the urging block and is jutted out of the through hole. The spring is sealed off in the through hole by a bolt. A hand tool head is provided at the rear end thereof with a protrusion which is pivoted to the receiving slot. In the normal state, the press rod is urged by the spring such that the front inclined plane urges the urging block so as to enable the urging block to locate the hand tool head. In adjusting the angle, the press rod is pressed to put a pressure on the spring so as to cause the front inclined plane to displace inward to remain a distance away from the front inclined plane of the urging block, thereby resulting in the inward displacement of the top of the urging block. As a result, the hand tool head is relieved of the retaining effect.
It is another objective of the present invention to provide a spring which is disposed between the urging block and the inner hole. When the urging block is urged by the protrusion of the hand tool head to displace inward, the spring is pressed downward such that a retaining portion of the hand tool head is elastically engaged with the spring, and that the hand tool head is prevented from a free fall at the time when the hand tool head is relieved of the retaining effect.
It is another objective of the present invention to provide the urging block with a pointed top, and the protrusion of the hand tool head with a plurality of toothed slots. When the urging block is urged by the press rod to extend, the top of the urging block is inserted into the toothed slot of the retaining portion of the protrusion of the hand tool head.
REFERENCES:
patent: 4271731 (1981-06-01), Suligoy et al.
patent: 5239977 (1993-08-01), Thomas
patent: 5674027 (1997-10-01), Warnaar
Browne Lynne H.
Cottingham John R.
Liauh W. Wayne
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