Patent ID: 9482266
Filing Date: 2016-11-01
CPC Classification: F16C,Y10T

Claim Text:
1. A composite tubular shaft having a connector fitted to at least one end portion thereof, the connector for connecting the composite tubular shaft to another component and comprising a screw threaded nut incorporating within said one end portion of the tubular shaft and having an external surface of which is shaped to receive in use composite material applied around the nut in a green state during shaft manufacture, wherein the external surface of the nut comprises two back to back frustoconical surfaces wherein one of the frustoconical surfaces is tapered from the midpoint of the nut to a first end of the nut and the other of the two frustoconical surfaces is tapered from the midpoint of the nut to an opposite end of the nut, so that the tubular shaft is flared outwards and inwards around the nut to securely trap the nut within said one end portion of the tubular shaft when cured, an annular collar for placement over the nut and composite material, a screw threaded end fitting which engages the screw thread within the nut, and a load means in use axially moving the collar relative to the end fitting to exert a clamping load onto the composite material surrounding the nut.