US2008090684A1PendingUtilityA1

Dart

13
Individually held — no corporate assignee on recordPriority: Oct 12, 2006Filed: Oct 12, 2006Published: Apr 17, 2008
Est. expiryOct 12, 2026(~0.2 yrs left)· nominal 20-yr term from priority
Inventors:Kelly M. Martinez
F42B 6/003
13
PatentIndex Score
0
Cited by
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References
0
Claims

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.

Claims

exact text as granted — not AI-modified
1 . 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. 
   
   
       2 . The dart barrel of  claim 1  wherein the body comprises metal. 
   
   
       3 . The dart barrel of  claim 2  wherein the body comprises one or more of tungsten, tungsten-copper, tungsten-nickel, tungsten-copper-nickel, tungsten-iron-nickel, brass, stainless steel and steel. 
   
   
       4 . The dart barrel of  claim 3  wherein the coating comprises a thickness of between about 1.5 μm and about 5.0 μm. 
   
   
       5 . The dart barrel of  claim 4  wherein the coating comprises a mono-layer coating. 
   
   
       6 . The dart barrel of  claim 5  wherein the mono-layer coating comprises Aluminum-Titanium-Nitride. 
   
   
       7 . The dart barrel of  claim 6  wherein the mono-layer coating has a hardness in excess of 3300 vickers. 
   
   
       8 . The dart barrel of  claim 7  wherein the mono-layer coating comprises about 33% titanium and about 67% aluminum. 
   
   
       9 . The dart barrel of  claim 4  wherein the coating comprises a multi-layer coating. 
   
   
       10 . The dart barrel of  claim 9  wherein the multi-layer coating comprises a first layer. 
   
   
       11 . The dart barrel of  claim 10  wherein said first layer comprises Titanium-Nitride. 
   
   
       12 . The dart barrel of  claim 10  wherein said first layer comprises Titanium-Aluminum. 
   
   
       13 . The dart barrel of  claim 10  wherein the multi-layer coating further comprises a second layer. 
   
   
       14 . The dart barrel of  claim 13  wherein the second layer comprises Titanium-Aluminum-Nitride. 
   
   
       15 . The dart barrel of  claim 14  wherein the multi-layer coating has a hardness of between about 3000 and about 3300 vickers. 
   
   
       16 . The dart barrel of  claim 15  wherein the multi-layer coating comprises about 40% Titanium and about 60% Aluminum. 
   
   
       17 . A dart having improved hardness and wear resistance comprising:
 a point;   a tail end;   an elongated body between the point and tail end;   a coating deposited on the body by physical vapor deposition, said coating comprising a layer of titanium, aluminum and nitride,   
     whereby the dart has improved hardness and wear-resistance. 
   
   
       18 . The dart of  claim 17  wherein the dart body comprises metal. 
   
   
       19 . The dart of  claim 18  wherein the dart body comprises one or more of tungsten, tungsten-copper, tungsten-nickel, tungsten-copper-nickel, tungsten-iron-nickel, brass, stainless steel and steel. 
   
   
       20 . The dart barrel of  claim 19  wherein the coating comprises a thickness of between about 1.5 μm and about 5.0 μm. 
   
   
       21 . The dart of  claim 20  wherein the coating comprises a mono-layer coating. 
   
   
       22 . The dart of  claim 21  wherein the mono-layer coating comprises Aluminum-Titanium-Nitride. 
   
   
       23 . The dart of  claim 22  wherein the mono-layer coating has a hardness in excess of about 3300 vickers. 
   
   
       24 . The dart of  claim 23  wherein the mono-layer coating comprises about 33% titanium and about 67% aluminum. 
   
   
       25 . The dart of  claim 20  wherein the coating comprises a multi-layer coating. 
   
   
       26 . The dart of  claim 25  wherein the multi-layer coating comprises a first layer. 
   
   
       27 . The dart of  claim 26  wherein said first layer comprises Titanium-Nitride. 
   
   
       28 . The dart of  claim 26  wherein said first layer comprises Titanium-Aluminum. 
   
   
       29 . The dart of  claim 26  wherein the multi-layer coating further comprises a second layer. 
   
   
       30 . The dart of  claim 29  wherein the second layer comprises Titanium-Aluminum-Nitride. 
   
   
       31 . The dart of  claim 30  wherein the multi-layer coating has a hardness of between about 3000 to about 3300 vickers. 
   
   
       32 . The dart barrel of  claim 31  wherein the multi-layer coating comprises about 40% Titanium and about 60% Aluminum.

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