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Rough metallic locking washer

A washer and metal technology, applied in the direction of washers, locking fasteners, threaded fasteners, etc., to achieve good anchoring and enhanced bonding effects

Inactive Publication Date: 2015-06-10
NORD LOCK INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These traces are also detrimental to non-metallic components such as composites

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] The subject invention is a metal lock washer having at least one surface roughened to thereby increase in parallel the friction of the surfaces in contact in a screw / nut system.

[0022] For this purpose, the contact surfaces are coated with a rough coating, which is achieved by heat projection of the added material. This is how the rough surface is formed.

[0023] Thus, the surface of the gasket is coated with a rough coating of the added material by means of a carrier gas which accelerates and transports particles of the added material at high temperature to the surface of the gasket.

[0024] Advantageously, usual thermal projection techniques can be used. Examples of such techniques include plasma, projection by spray deformation, wire-arc, cold projection, or by explosive spray gun.

[0025] Plasma technology uses a plasma torch which melts and accelerates the added material towards the surface to be treated to form a coating. Projection by jet deformation cons...

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PUM

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Abstract

Rough metallic locking washer The present invention relates to a metallic locking washer(10, 20, 20') intended for being mounted in a screw / nut system to engage between a nut and a bearing element, said metallic locking washer having a contact face (12, 14; 20, 30; 30', 32') suitable for coming into contact with one or the other of the nut and the bearing element, said contact face (12, 14; 30, 32; 30', 32') having a surface which is suitable for being brought along in friction against one or the other of the nut and the bearing element when the nut loosens. According to the invention said contact face is coated, by thermal projection of an additive material, with a rough coating forming a rough surface in order to enable an increase in the friction forces between the contact face (12, 14; 30, 32; 30', 32') of the metallic washer(10, 20, 20') and one or the other of the nut and the bearing element.

Description

technical field [0001] The present invention relates to a metal lock washer intended for installation in a screw / nut system. Background technique [0002] In the field of assembly where screw / nut systems are used, it is required that the nuts do not loosen. In addition, a washer, for example with radial ridges, is interposed between the nut to be threaded and the element to be screwed through by the threaded shank member to increase friction between the ribbed washer, the element to be threaded and the nut. In this way, after the nut has been tightened, the washer is held with great force between the element to be screwed and the nut. In addition, loosening of the gasket, eg caused by vibrations, is precisely braked due to the radial ridges. The radial ridges actually increase the friction between the contacting surfaces. [0003] Such radial ridges are also implemented on locking washers with two washer crowns. Such a locking washer comprises two washer crowns applied c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B2/00F16B39/24C23C4/06C23C4/10C23C4/12C23C4/123C23C4/134
CPCF16B2/005F16B39/24F16B43/00
Inventor 皮埃尔·夏朗东克里斯托夫·戴查尔斯特凡·默尼耶
Owner NORD LOCK INT
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