Dart

Inactive Publication Date: 2008-04-17
GREAT LAKES DART MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]It is an object of this invention, to provide a dart barrel having a coating with improved hardness and wear resistance.
[0006]Another object of the invention is to provide a dart having improved hardness and wear resistance.
[0007]A further object of the invention is to provide a dart having a surface with improved grip.

Problems solved by technology

Many darts known in the art suffer from disadvantages related to durability.
Darts known in the art have coatings that are susceptible to these disadvantages and, as such, have a shorter product life.

Method used

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Embodiment Construction

[0022]Referring to FIG. 4, the invention comprises a dart barrel. The dart barrel 10, most broadly, comprises a body 20, a surface on the body 22 and a coating deposited on the surface by physical vapor deposition. The coating comprises a layer of titanium, aluminum and nitride whereby the dart barrel has improved hardness and wear resistance.

[0023]The body comprises metal. In preferred embodiments, the body comprises one or more of tungsten, tungsten-copper, tungsten-nickel, tungsten-copper-nickel, tungsten-iron-nickel, brass, stainless steel and steel.

[0024]In most highly preferred embodiments, the coating has a thickness of between about 1.5 μm and about 5.0 μm.

[0025]In one embodiment of the invention, the coating is a mono-layer coating. The mono-layer coating comprises a aluminum-titanium-nitride deposited simultaneously by physical vapor deposition. The mono-layer coating is commercially available through Guhring Inc., of Brookfield, Wis. under the product name Super-A. The ha...

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PUM

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Abstract

A dart barrel comprising a body, a surface on the body; and a coating deposited on the surface by physical vapor deposition, said coating comprising a layer of titanium, aluminum and nitride, whereby the dart barrel has improved hardness and wear resistance. The body is metal and the coating on the surface of the body has a thickness of between about 1.5 μm and about 5.0 μm. In one embodiment, the coating is a mono-layer coating. In another embodiment, the coating is a multi-layer coating.

Description

FIELD OF THE INVENTION[0001]The invention relates generally to darts and specifically to an improved dart coating wherein the dart has increased durability and wear resistance.BACKGROUND OF THE INVENTION[0002]The game of darts has been played for centuries. Today, the game of darts is seen everywhere from pubs to organized competitive leagues. Since the origins of dart games in medieval times, the dart itself has undergone many changes. Darts were first crudely made from shortened arrows which were thrown at tree trunks or wine barrels. Today's darts consist generally of a dart barrel, a shaft, a tip and an end having flights (also known as fletchings). While these four basic features of darts remain relatively constant, numerous other factors determine the overall quality of a dart.[0003]Several factors are critical in making a good dart. For instance, the composition of the dart barrel, weight of the barrel, overall balance, and the durability of the barrel are important features ...

Claims

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Application Information

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IPC IPC(8): A63B65/02
CPCF42B6/003
InventorMARTINEZ, KELLY M.
OwnerGREAT LAKES DART MFG