Tools – Wrench – screwdriver – or driver therefor – Machine
Reexamination Certificate
2000-02-22
2001-01-30
Smith, James G. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Machine
C081S429000, C081S480000, C081S057420, C173S093500
Reexamination Certificate
active
06178853
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an actuating device for an electrical power wrench and includes a pin which radially impacts a plate mounted to the output shaft by a pivotal movement of a pushing member which is actuated by a movable frame when an eccentric force is applied to the frame.
BACKGROUND OF THE INVENTION
The present invention intends to provide an actuating device for an electrical power wrench wherein the output shaft has a plate mounted thereto which is radially impacted by a pin controlled by the eccentric force of the power wrench. The pin extends and radially impacts the plate when the desired eccentric force of the base member driven by a motor is reached. The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional power wrenches.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided an actuating device for an electrical power wrench which comprises a base member having a tubular member extending from centrally a first side thereof so as to be connected to a motor. A passage is defined through the base member for receiving a pin therein which is biased by a spring. A side recess is defined in the base member and a ball is received in the side recess and biased by a spring. Two blocks extend from the first side of the base member. A movable frame is movably connected to the first side of the base member with a weight connected to a first end of the movable frame. Two lugs extend from the movable frame which is retained by a guide plate connected to the first side of the base member. Two springs are respectively connected between the rods and the movable frame.
An actuating member has a first part engaged with the two lugs of the movable frame, and a second part of the actuating member extending from the first part at an angle relative to the first part. The actuating member is pivotally connected between the two blocks and the second part of the actuating member located adjacent the pin. An output shaft is rotatably and centrally connected to the second side of the base member, and a plate extends radially outward from the output shaft.
The primary object of the present invention is to provide an actuating device which impacts the plate on the output shaft when the motor rotates at a desired high speed so as to output a sudden and large torque on the object.
Another object of the present invention is to provide an actuating device wherein the movement of the pin to impact the plate of the output shaft is resulted in the eccentric force caused from the rotation of the base member driven by the motor.
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: 5083619 (1992-01-01), Giardion et al.
patent: 5412546 (1995-05-01), Huang
patent: 5839518 (1998-11-01), Setsuko
patent: 5890403 (1999-04-01), Buck
patent: 5915484 (1999-06-01), Hsieh
patent: 5941319 (1999-08-01), Juan
patent: 5954141 (1999-09-01), Li et al.
Shakeri Hadi
Smith James G.
You Jin Industrial Co., Ltd.
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