Invention Application
- Patent Title: EASY STARTING SCREW
- Patent Title (中): 易于启动的螺丝
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Application No.: PCT/SE2016/050892Application Date: 2016-09-22
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Publication No.: WO2017074239A1Publication Date: 2017-05-04
- Inventor: BERGFJORD, Mathias , LARSSON, Linus , LARSSON, Ove , LINDBERG, Christofer , FALCK, Jörgen
- Applicant: ESSVE PRODUKTER AB
- Applicant Address: Box 7091 164 07 Kista SE
- Assignee: ESSVE PRODUKTER AB
- Current Assignee: ESSVE PRODUKTER AB
- Current Assignee Address: Box 7091 164 07 Kista SE
- Agency: ZACCO SWEDEN AB
- Priority: SE1551392-2 20151028
- Main IPC: F16B25/00
- IPC: F16B25/00 ; F16B25/04
Abstract:
A screw (10) comprising a tip (11); a head (12) for accommodating a tool to rotate the screw (10) around a rotational axis (17) of the screw (10); and a thread (15) extending from the tip (11) towards the head (12), the thread (15) having a thread depth (w) that varies along a length of the screw (10) between a minimum thread depth and a maximum thread depth (w max ), wherein the thread (15) comprises a tip thread portion (18) extending along one half turn or less around the rotational axis (17) of the screw (10) and exhibiting a thread depth increase (Δw 1 ) within the tip thread portion (18) corresponding to at least one half of the maximum thread depth (w max ). Hereby a reduced axial force is needed for starting the entry into a workpiece of the screw.
Information query
