Implements or apparatus for applying pushing or pulling force – Single throw lever – Mechanically actuated
Reexamination Certificate
2000-07-21
2001-10-09
Hail, III, Joseph J. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Single throw lever
Mechanically actuated
C254SDIG002, C254S103000
Reexamination Certificate
active
06299138
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a directly driving electromotive jack device for releasing a torsional force, which can be carried in a car; and the electromotive jack can be lifted or descended through a simple and convenient operation by the user.
BACKGROUND OF THE INVENTION
The current used jack used in a small car is almost operated manually. The operation way is to shake a bow shape handle to lift or descend an arm of the jack. In operating process, it is often that the jack is tilt due to an improper force applied thereon. Thus, a large force is necessary. This is difficult for a women. Besides, the prior art jack has a large volume or a heavy weight for enhancing the stability thereof. This is a larger burden to a women.
Therefore, electromotive jacks are developed. However, some torsional force releasing means are necessary to be connected between the jack and the motor. Since the structure is complex, and the cost is high and heavy burdens can not be lifted, Therefore, this prior art electromotive jack does not be used widely. Moreover, a motor with larger power and a heavy weight is used, and therefore, it is hard for a women to transfer it.
Therefore, there is an eager demand for a novel directly driving electromotive jack device for releasing a torsional force so as to improve the aforesaid defects in the prior art.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a directly driving electromotive jack device for releasing a torsional force; wherein the torsional force releasing means comprises a positioning plate for fixing the electromotive motor; two or more than two symmetric arms of torsional force; a bearing for passing through the electromotive motor; a switch connected to the driving screw rod. The electromotive motor is fixed to the positioning plate by a plurality of studs. The arms of torsional force serve to connect the positioning plate with pivotal shafts of the jack. The rotary shaft of the electromotive motor and the driving screw rod are positioned in a same central line. The driving screw rod passes through the bearing and the sleeve. The bearing is fixed on the pivotal shafts and is positioned between the pivotal shafts and the sleeve; and the sleeve is connected with the rotary shaft of the electromotive motor.
The aforesaid torsional force releasing means serves to combine the rotary shaft of the electromotive motor with the sleeve. When the rotary shaft of the electromotive motor rotates, the torsional force can be cancelled by the torsional force releasing means for preventing the jack from generating a strain or being tilt; moreover, by a switch of a 12 to 15 volts DC power source in a car to control the direction of the current flow, the jack can be lifted or descended.
The present invention has the following effect:
1. A car or a heavy article can be lifted upwards steadily and safely.
2. The present invention has a simple structure and a lightweight so that a woman can operate the present invention.
3. The operation of the present invention is simple, the operator is only necessary to switch the direction of the jack, then the jack can be lifted or descended.
4. After the torsional force is released, the jack is prevented from staining or tilting.
5. The present invention can be mass-produced, and thus the manufacturing cost is lowered.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when reading in conjunction with the appended drawing.
REFERENCES:
patent: 4653727 (1987-03-01), Chang et al.
patent: 4941797 (1990-07-01), Smillie, III
patent: 4943034 (1990-07-01), Wagnon
patent: 5580207 (1996-12-01), Kiebooms et al.
patent: 5707043 (1998-01-01), Yoshida
patent: 6029950 (2000-02-01), Yeh
Chou Ching-Hsing
Huang Chen-Ti
A & J
Hail III Joseph J.
Huang Chen-Ti
Wilson Leo
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