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Fastener & fastening system

A technology of fasteners and cross-sections, applied in threaded fasteners, connecting components, nails, etc., can solve problems such as complex structures, achieve the effects of firm attachment, improved fastening methods, and increased efficiency

Active Publication Date: 2009-07-08
PROD LICENSING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex structure of this type of mechanism, once it is blocked or stuck due to failure, lack of lubricating oil or damage, it will bring very serious consequences

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0038] fastener

[0039] The typical impact fastener 1 of the present invention has a twisted wire body with a protruding large-radius helix 3 at the forward tip of a substantially conical or frustum of cone 11 and a protruding extension at the rear end. Between long recessed drive shanks 4 with reduced diameter, such as figure 1 shown.

[0040] The torsion body has a solid central axis 2 which is continuous substantially throughout the length of the fastener, said central axis 2 having a maximum cross-sectional diameter at least 7 smaller than the circumscribed circle of the cross-section of said fastener helix. Sixty percent smaller in diameter. Having a torsion body and a relatively small central axis makes the fastener torsionally elastic, allowing it to accommodate small movements between additional layers without affecting the strength of the connection.

[0041] The helical body 3 that forms a taper from the front tip of the fastener has two or three knife-like protr...

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Abstract

The present invention utilises impact-driven fastener (1) having a twisted body having: a common axial core (2) a protruding helix (3) and a trailing elongate lost-end driving shank: (4) of reduced radial diameter. The fastener incorporates two or three loosely wound loosely wound thread-cutting blade-like helical projections (5) extending radially from a solid axial core (2). These blade-like projections (5) are inclined upon a sweeping helical angle (8) of less than 42 DEG to the longitudinal axis (9) of the core (2). The elongate shank (4), which carries no swept angle thread-cutting blades, has a reduced cross sectional diameter that is approximately one half or less of a cross-sectional circumscribed diameter (7) of a protruding helix (3), from which it extends coaxially, such as to fit into and cooperate with a driving adapter (21) having a hollow leading end (24), said leading end of a driving adapter having an external diameter that is less than a cross-sectional circumscribed diameter (7) of the fastener (1).

Description

technical field [0001] The present invention relates to the subject matter of joining multiple structural layers, and in particular to a helical type fastener that connects at least two load-bearing layers and ensures a firm bond between the load-bearing layers. Background technique [0002] The art of joining two or more objects using impact screw fasteners, which have blades that form uncoiled threads, has been commercially available for the past 20 years. This helical fastener utilizes the helical crests and troughs of the helical structure to interlock within the load-bearing material to create a securement point. [0003] The simplest helical fasteners are headless and flat-head screws that can be drilled into the load-bearing layer and cut a helical interlocking penetration path with a simple hammer blow. One or more of the usual applications is to join or rejoin two or more pieces of stone, the long thin section of this fastener is used to tie two hollow layers toget...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B15/06E04B1/41E04G23/02
CPCE04B1/4178E04G23/0222E04B1/4185B25B23/0035B25B13/065F16B25/10F16B23/0061B25B15/004F16B25/0031Y10T29/49963
Inventor 威廉·亨利·奥利斯大卫·詹姆斯·查德威克
Owner PROD LICENSING CO LTD
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