Bolts and methods of bolting
AssigneePilgrim Engineering Developments Limited
InventorThomas W. Bunyan
Life of this patent
Estimating the term…
Abstract
A bolt comprises a tapered shank. The shank comprises an outer member with a cylindrical bore and an inner member with a cylindrical outer surface that is a close fit in the cylindrical bore. The inner member is secured to the outer member at the broader end of the shank and a screw thread is secured on a portion of the inner member projecting from the narrower end of the outer member, for receiving a nut which is used in tensioning the bolt into the workpiece.
Claims9
A tapered dowel bolt comprising a tapered shank having a broader end and a narrower end, said shank comprising an inner member and an outer member, said outer member having a circumferentially continuous tapered outer surface to mate with a coaxial continuous tapered bore in one or more workpieces, and an axially-extending unthreaded cylindrical bore, said inner member having a cylindrical outer surface which is a close sliding fit in said cylindrical bore, said inner member being anchored to said outer member only at the broader end of said shank and including a portion projecting from said outer member at said narrower end of said shank, and means on said projecting portion of said shank securing abutment means to said inner member.
Dependencies are inferred from the claim text.