Attachment structure for cylindrical member

Claim 1

A combination mechanically retained and adhesively bonded attachment structure for a cylindrical member, comprising: (a) an elongate fitting of preselected external shape having a first end and a second end and along a central axis thereof a plurality of axially displaced coaxial right cylindrical bores of respective preselected diameters, extending through said first and said second end of said elongate fitting; the smallest of said bores having diameter selected to loosely receive a substantially cylindrically shaped member for attachment to said fitting; (b) said elongate fitting being configured for placement on said member such that said axially displaced coaxial right cylindrical bores have successively smaller diameters in the direction of axial loads applied to said member; and (c) a finely divided particulate abrasive material and solidifiable resin within the annular spaces defined within said fitting and around said member, said resin disposed substantially throughout and surrounding said abrasive material for forming a hardened adhesive bond between said fitting and member, for defining abrasive interfaces between said abrasive material and said fitting and between said abrasive material and said member, and for defining a plurality of annular load bearing shoulders abutting the shoulders defined by said bores in said fitting, when said resin is solidified.