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US 2011/0079119 A1Published application
Screwdriver
OwnerYu-Jyun Lee, Yu-Hao Leeinventors
Life of this patent
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Abstract
A screwdriver includes a shank and a head formed at an end of the shank. The shank is made with a diameter. The head is formed with blades. Each of the blades includes an edge. The distance between the edges of any two opposite ones of the blades is larger than the diameter of the shank.
Claims3
A screwdriver-making process comprising the steps of:
- providing a shank with a diameter;
- providing a mold with a cavity defined therein, with a diameter larger than the diameter of the shank;
- partially inserting the shank into the mold;
- and
- moving the shank towards relative to the mold so that an end of the shank is made an enlarged head due to extrusion.
2 more elements
A screwdriver comprising:
- a shank made with a diameter;
- and
- a head formed on the shank and formed with blades each comprising an edge so that the distance between the edges of any two opposite ones of the blades is larger than the diameter of the shank.
Dependencies are inferred from the claim text.