Title:
The screw which prevents a crack and generating of a barricade
Document Type and Number:
Japanese Patent JP6261552
Kind Code:
B2
Abstract:
A screw according to the present disclosure includes a head (210), a shank (220), a thread (230), a plurality of first ribs (252) and at least one second rib (262). The thread is formed on the shank. The head is formed at one end of the shank and is configured to receive a fastening tool. The head is of tapered shape and has tapered side-surfaces, which include a first side surface (250) and a second side surface (260). The second side surface is located between the first side surface and the shank. The first ribs (252) are positioned on the first side surface (250). The second rib (262) is positioned on the second side surface (260).
Inventors:
Lin, Chao-Way
Application Number:
JP2015226185A
Publication Date:
January 17, 2018
Filing Date:
November 19, 2015
Export Citation:
Assignee:
Quantex Research, Inc.
International Classes:
F16B25/00
Domestic Patent References:
| JP5071522A | ||||
| JP2003306978A | ||||
| JP5157107A | ||||
| JP6018708U | ||||
| JP3187217U | ||||
| JP49143675U |
Foreign References:
| US7604445 | ||||
| US6394725 | ||||
| WO1985005415A1 |
Attorney, Agent or Firm:
Ryoichi Takaoka
Nao Oda
Akiyo Iwahori
Kaoru Takahashi
Nao Oda
Akiyo Iwahori
Kaoru Takahashi