Illumination – With implement or hand held holder therefor – Hand tool
Reexamination Certificate
2000-02-22
2001-10-23
Sember, Thomas M. (Department: 2875)
Illumination
With implement or hand held holder therefor
Hand tool
C362S120000, C081S177400, C081S490000
Reexamination Certificate
active
06305815
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a screwdriver which has a shank extending from a front end of a handle of the screwdriver and a bit set for receiving bits is slidably received in the handle.
BACKGROUND OF THE INVENTION
A conventional screwdriver generally includes a handle and a shank extending from a front end of the handle. The shank has an engaging hole defined in a distal end of the shank so that different bits can be engaged with the engaging hole of the shank and perform different functions. The screwdriver is convenient for the user to carry and bits can be easily replaced and engaged with the shank. However, the bits are received in a box and the box is independent from the screwdriver so that the user has to carry the bit box and the screwdriver. A cartridge type screwdriver is developed and disclosed in U.S. Pat. No. 5,265,504 to Fruhm, with the title of “Cartridge Type Screwdriver”. The shank of the cartridge type screwdriver includes a neck portion which is securely engaged with a passage of the handle. The engagement between the neck portion and the passage requires a large mold set to manufacture and complicated checking processes to position the neck portion in the passage so that the screwdriver is incurred by high manufacturing cost. The shank is made of metal and has the same length as the handle so that each screwdriver employs a certain amount of metal which makes the price of the screwdriver be high. Besides, the magazine has no proper support when it is pulled out from the handle.
The present invention intends to provide a screwdriver having a bit set slidably received in the handle and the bit set is well positioned when it is pulled from the handle.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a screwdriver and comprising a hollow handle having a shank extending from a first end of the handle and a cap rotatably and removably engaged with a second end of the handle. A bit set is received in the handle and connected to the cap. The bit set has a central column and a plurality of clamping plates are radially connected to the central column so as to receive bits. A head member is connected to a first end of the central column and the head member is movably engaged with the inner periphery of the handle. A limit ring extends radially inward from an inner periphery of the handle and the head member will be stopped by the limit ring when the bit set is pulled from the second end of the handle.
The object of the present invention is to provide a screwdriver that includes a hollow handle with a slidable bit set received therein and the bit set has a head member connected thereto so that it is well supported during pulling from the handle.
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: 4227430 (1980-10-01), Jansson et al.
patent: 5265504 (1993-11-01), Fruhm
patent: 5566596 (1996-10-01), Lin
patent: 5740706 (1998-04-01), Tseng
patent: 5799552 (1998-09-01), Curtis
patent: 5873648 (1999-02-01), Shiao
patent: 5881615 (1999-03-01), Dahl et al.
patent: 5913596 (1999-06-01), Lin
Home Soon Enterprise Co., Ltd.
Sember Thomas M.
LandOfFree
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