Invention Grant
US08757950B2 Structure of cross-shaped groove of screw for fit with driver bit
有权
螺丝十字形槽的结构，用于配合螺丝刀头
- Patent Title: Structure of cross-shaped groove of screw for fit with driver bit
- Patent Title (中): 螺丝十字形槽的结构，用于配合螺丝刀头
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Application No.: US13122419Application Date: 2009-10-07
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Publication No.: US08757950B2Publication Date: 2014-06-24
- Inventor: Nobuhiro Ogawa , Naoki Yokoyama
- Applicant: Nobuhiro Ogawa , Naoki Yokoyama
- Applicant Address: JP Saitama
- Assignee: Crown Screw Corporation
- Current Assignee: Crown Screw Corporation
- Current Assignee Address: JP Saitama
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2008-264293 20081010
- International Application: PCT/JP2009/005203 WO 20091007
- International Announcement: WO2010/041437 WO 20100415
- Main IPC: F16B35/06
- IPC: F16B35/06 ; F16B23/00
Abstract:
A screw has a head with a cross-shaped groove having first to fourth wing grooves, each having bilaterally-formed inner side faces defined by opposing base-end inner side faces, opposing intermediate inner side faces and opposing distal-end inner side faces angled at angles relative to each other so that the first angle of the base-end inner side face
Public/Granted literature
- US20110182696A1 STRUCTURE OF CROSS-SHAPED GROOVE OF SCREW FOR FIT WITH DRIVER BIT Public/Granted day:2011-07-28
Information query
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