Tools – Including tool driving by impact delivering component or... – Structurally constrained to arcuate movement
Reexamination Certificate
2002-04-08
2003-11-18
Wilson, Lee D. (Department: 3723)
Tools
Including tool driving by impact delivering component or...
Structurally constrained to arcuate movement
C173S093000, C081S463000
Reexamination Certificate
active
06647837
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of Invention
The present invention is related to a hand tool that in a mode can transform a blow into a torque and in another mode can work as an ordinary screwdriver.
2. Related Prior Art
FIG. 12
shows a conventional hand tool
100
that is capable of transforming a blow into a torque. The hand tool
100
includes a handle
101
that is hollow and includes an open end
102
and a closed end. The handle
101
includes a neck
103
of a reduced diameter formed thereon near the open end
102
. A V-shaped slot
104
is defined in the neck
103
. A spring
105
is received in the handle
101
. A shaft
106
includes a square end for engagement with a tool bit. A recess
107
is defined in the periphery of the shaft
106
. The shaft
106
is partially inserted in the handle
101
so that the recess
107
is aligned with the V-shaped slot
104
. A pin
108
is inserted through the V-shaped slot
104
and received in the recess
107
. An elastic collar
109
is mounted on the neck
103
, thus retaining the pin
108
in position. A blow exerted on the closed end of the handle
101
by a hammer can be transformed into a torque exerted on the shaft
106
due to the engagement of the V-shaped slot
104
with the pin
108
. Thus, a user can exert a greater torque than he can with an ordinary screwdriver. Therefore, the conventional hand tool
100
is used at a final stage of tightening a threaded bolt and at an initial stage of releasing a threaded bolt. However, the hand tool
100
is less useful than an ordinary screwdriver in other situations. In addition, the hand tool
100
cannot be used to carry tool bits that can easily be forgotten and lost.
The present invention is therefore intended to obviate or at least alleviate the problems encountered in the prior art.
SUMMARY OF INVENTION
It is the primary object of the present invention to provide a hand tool that in a mode can transform a blow into a torque and in another mode can work as an ordinary screwdriver.
According to the present invention, a hand tool includes a handle, a plunger, an elastic element, a driver, a device for transforming a blow into a torque and a clutch. The handle is hollow. The plunger includes a first end and a second end. The plunger is inserted in the handle so that it cannot rotate relative to the handle and that the second end extends beyond the handle. The elastic element is received in the handle. The driver includes a first section for engagement with a tool bit and a second section received in the handle so that it can rotate relative to the handle. The transforming device is arranged between the plunger and the driver for transforming a blow on the second end of the plunger into a torque on the second section of the driver. The clutch is mounted on the first section of the driver so that it cannot rotate relative to the driver and can move between a first position where it cannot rotate relative to the handle and a second position where it can rotate relative to the handle.
The hand tool may include a device formed around the handle for storing tool bits. The storing device includes two shells pivotally mounted on the handle for carrying tool bits. Each of the shells includes an semi-annular portion defining a plurality of recesses for receiving tool bits.
The hand tool may include a telescopic element that is attached thereto and includes a magnetic end.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the attached drawings.
REFERENCES:
patent: 5012709 (1991-05-01), Su
patent: 5321999 (1994-06-01), Lin
patent: 6370993 (2002-04-01), Pitstick
patent: 6524035 (2003-02-01), Robison
Kamrath Alan D.
Rider Bennett LLP.
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