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Dart flight rotation shaft and flight rotation shaft assembly

  • US 4,978,130 A
  • Filed: 10/14/1986
  • Issued: 12/18/1990
  • Est. Priority Date: 05/29/1986
  • Status: Expired due to Term
First Claim
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1. A dart shaft-flight assembly comprised of a non-rotating dart flight shaft and a rotatable snap on readily removable dart flight, having a central axis, attached thereto, said shaft having a cylindrical forward portion and a flight mating portion readily separable from said snap-on, readily removable, attached dart flight said dart flight further comprised of a flight bushing tube located along the central axis of said flight, a plurality of vanes or fins equally spaced around said flight bushing tube and an axial cavity whose inner diameter has one or more respective recess(es) and/or extension(s) whose distance(s) and shape conform substantially to respective extension(s) and/or recess(es) on a flight attachment means of said shaft flight mating portion yet leave a gap or a space therebetween permitting said flight to be free to rotate, clockwise or counter-clockwise, around such shaft;

  • wherein said shaft flight mating portion has a means of attachment to said flight around which said flight can rotate freely, clockwise or counter-clockwise, said shaft attachment means having an outer diameter with one or more portions of larger, diameter (extension) and/or smaller diameter (recess) than its remaining portion(s) to enable it to mate at such extension(s) and/or recess(es); and

    wherein said shaft-flight assembly is characterized in that no portion of said shaft flight attachment means is external to any external surface of said flight.

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