Dart shaft

Abstract

There is provided a dart shaft comprising: a first shaft portion formed of metal, the first shaft portion having a first end for connection to a dart barrel and a second end comprising a first threaded portion; and a second shaft portion, the second shaft portion having a first end for connection to a flight and a second end comprising a second threaded portion; wherein the first threaded portion is externally threaded and the second threaded portion is internally threaded, and wherein the first and second threaded portions are configured to engage with each other to releasably connect the first shaft portion and the second shaft portion together.

1 . A dart shaft, comprising:
 a first shaft portion formed of metal, the first shaft portion having a first end for connection to a dart barrel and a second end comprising a first threaded portion; and   a second shaft portion, the second shaft portion having a first end for connection to a flight and a second end comprising a second threaded portion;   wherein the first threaded portion is externally threaded and the second threaded portion is internally threaded, and wherein the first and second threaded portions are configured to engage with each other to releasably connect the first shaft portion and the second shaft portion together.   
     
     
         2 . A dart shaft as claimed in  claim 1 , wherein the first shaft portion and the second shaft portion each have an elongate shape having an external length to width ratio of at least 1.5 to 1. 
     
     
         3 . A dart shaft as claimed in  claim 1 , wherein the first shaft portion comprises a grip portion. 
     
     
         4 . A dart shaft as claimed in  claim 3 , wherein the grip portion comprises a plurality of grooves or protrusions extending circumferentially around an external surface of the first shaft portion. 
     
     
         5 . A dart shaft as claimed in  claim 4 , wherein the grooves or protrusions extend along at least 50% of an external length of the first shaft portion. 
     
     
         6 . A dart shaft as claimed in  claim 1 , wherein the first end of the first shaft portion comprises a third threaded portion for engaging with a fourth threaded portion of a dart barrel. 
     
     
         7 . A dart shaft as claimed in  claim 1 , wherein the first end of the second shaft portion comprises one or more slits for receiving the flight. 
     
     
         8 . A dart shaft as claimed in  claim 7 , wherein the one or more slits extend from a tip of the second shaft portion along the second shaft portion in an axial direction. 
     
     
         9 . A dart shaft as claimed in  claim 1 , comprising a washer arranged around the second shaft portion for securing the flight to the first end of the second shaft portion. 
     
     
         10 . A dart shaft as claimed in  claim 1 , wherein the metal comprises aluminium or an aluminium alloy. 
     
     
         11 . A dart shaft as claimed in  claim 1 , wherein the second shaft portion is formed of plastic. 
     
     
         12 . A dart shaft as claimed in  claim 11 , wherein the plastic comprises nylon. 
     
     
         13 . A dart shaft as claimed in  claim 1 , wherein the second shaft portion is formed of metal.