TW200742805A - Screw, punch and screw driver bit - Google Patents
Screw, punch and screw driver bitInfo
- Publication number
- TW200742805A TW200742805A TW095116664A TW95116664A TW200742805A TW 200742805 A TW200742805 A TW 200742805A TW 095116664 A TW095116664 A TW 095116664A TW 95116664 A TW95116664 A TW 95116664A TW 200742805 A TW200742805 A TW 200742805A
- Authority
- TW
- Taiwan
- Prior art keywords
- fan
- screw
- head
- punch
- curved
- Prior art date
Links
Landscapes
- Forging (AREA)
Abstract
A screw includes a shank and a head. The head is provided with a thread. The head is connected to the shank and includes a drive recess, which includes a plurality of fan-shaped grooves and a square groove. The fan-shaped grooves are equidistantly disposed on and around the drive recess. The square groove is formed at the center of the fan-shaped grooves. The fan of each fan-shaped groove includes at least one first curved line, two second curved lines and two straight lines. Two ends of the second curved line are respectively connected to the first curved line and the straight line, whereby pointed tips of the fan-shaped groove of the drive recess is curved so as to avoid forming the pointed tips of the fan-shaped groove. In addition, a punch is used for forging the screw head of the present invention, and a screw driver bit is used for driving the screw head of the present invention.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW95116664A TWI300110B (en) | 2006-05-11 | 2006-05-11 | Screw, punch and screw driver bit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW95116664A TWI300110B (en) | 2006-05-11 | 2006-05-11 | Screw, punch and screw driver bit |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200742805A true TW200742805A (en) | 2007-11-16 |
TWI300110B TWI300110B (en) | 2008-08-21 |
Family
ID=45069880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW95116664A TWI300110B (en) | 2006-05-11 | 2006-05-11 | Screw, punch and screw driver bit |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI300110B (en) |
-
2006
- 2006-05-11 TW TW95116664A patent/TWI300110B/en active
Also Published As
Publication number | Publication date |
---|---|
TWI300110B (en) | 2008-08-21 |
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