Invention Application
- Patent Title: SCREW WITH PULL-OUT RESISTANT THREAD NORMAL TO SHANK
- Patent Title (中): 螺丝螺栓具有拉出电阻螺纹正常到SHANK
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Application No.: PCT/CA2010/000747Application Date: 2010-05-18
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Publication No.: WO2011143733A1Publication Date: 2011-11-24
- Inventor: WALTHER, Mirco
- Applicant: WALTHER, Mirco , WALTHER, Uli , WALTHER, Gerda
- Applicant Address: 139 Malibu Court, Thunder Bay, Ontario P7K 1C3 CA
- Assignee: WALTHER, Mirco,WALTHER, Uli,WALTHER, Gerda
- Current Assignee: WALTHER, Mirco,WALTHER, Uli,WALTHER, Gerda
- Current Assignee Address: 139 Malibu Court, Thunder Bay, Ontario P7K 1C3 CA
- Agency: MORGAN, Bruce et al.
- Main IPC: F16B25/04
- IPC: F16B25/04 ; F16B33/02 ; F16B39/30
Abstract:
A screw fastener (1) having a head (A), threaded shank (B) and tip end (C) has an upper thread surface(s) extending at an angle x of 0° - 3° from a normal to a longitudinal axis (3) of the screw and an apex angle β at the periphery of the screw in the range between 25° and 45°. The screw exhibits resulting in significantly increased pull-out resistance.
Information query
