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Slotted screw

A screw and screw head technology, applied in the direction of screws, bolts, screwdrivers, etc., can solve problems such as difficulty in work performed by users

Inactive Publication Date: 2012-11-07
ZED DESIGN COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] - When screwing cross-slotted screws manually or using a corresponding mechanical screw-driving tool (screw-driving drill), a corresponding pressing force is necessary, depending on the torque requirements and the operating position of the user required for this To a certain extent, the work that the user can perform is very difficult

Method used

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  • Slotted screw
  • Slotted screw
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0138] Page 1-A:

[0139] These basic figures include counter-slotted screw types of screw embodiment A with and without tapered screw head underparts described in this invention.

[0140] figure 1 Shown is the top end of a corresponding screw driver / driver head, where the vertical or Parallel transfer surface (1). (2) represents the deepest outer corner of the top end of the screw driver / driver head, which corresponds to the outer end (14) of the facing slot. Centering and full drive connection screw driver / driver head tip is established by inserting the screw against the slot direction (arrow).

[0141] according to figure 1 Section A-A of the screw is shown, where the top surface of the screw (8) is marked, with (or without) the hemispherical centering surface (15), the inner groove wall surface (9), the inclined base plane of the opposite groove ( 10), semicircular centering surface (12), and its deepest centering point (13). On the semicircular centering surface (...

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PUM

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Abstract

A slotted screw comprises slotted surfaces (9) on the screw head, wherein the slotted surfaces are vertical or substantially vertical, and the slotted surfaces are disposed parallel or substantially parallel to each other. The slotted screw further comprises slotted supporting surfaces (10) inclined toward the outside at an angle within a range of 0 DEG to 20 DEG , and a semicircular recessed centering surface (12) which is centrally positioned by means of rounded tip surfaces (11) and has a lowest point (13). The slotted screw is configured such that a tip to be received for manual screwdrivers / bits and for screwdriving devices can safeguard the centering of the screwdriver / bit tips in the slotted screw during insertion, at the beginning of the screw-driving operation and during the latter by means of the screw pressure surfaces (1), which are vertical or substantially vertical and which are disposed parallel or substantially parallel to each other in pairs, by means of the corresponding slotted supporting surfaces (3), and by means of a semicircular and elevated centering surface (5) which is centrally positioned by means of rounded corner surfaces (4) and has a highest point (6). The slotted screw may be configured as a diametrically slotted screw, or as a three-figure radial slotted screw.

Description

【Technical field】 [0001] The invention relates to opposed slotted screws (Diametralschlitzschraube) and 3R slotted screws (triple radial slotted screws, dreizaehlige Radiaschlitzschrauben) and their screw drivers / driver heads (Schraubendreherspitzen- / Bits). 【Background technique】 [0002] Due to the introduction of the manufacture of H-type (Phillips) cross-slotted screws and Z-type (Pozidriv) cross-slotted screws, as well as the partially used special type of cross-slotted screws with additionally widened opposite grooves, the original standard slotted screws were mainly The centering disadvantage of mechanical screw drive operations has become less valuable. [0003] This conclusion is easy to understand, since during the screw driving operations performed today, the use of most such cross grooves simplifies the working method by assuring centering for the transmission of conventional torques. [0004] Alternatively, "positive / negative cross-groove screws" according to DI...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B15/00F16B23/00
CPCF16B23/0015F16B23/0053B25B15/007
Inventor H·佐勒
Owner ZED DESIGN COMM TECH