Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Frangible member
Patent
1981-01-23
1983-02-01
Wolfe, Robert L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Frangible member
411 71, F16B 1306
Patent
active
043713009
ABSTRACT:
An insert for installation in a hole therefor in parent member comprises a body having an exterior increase in diameter between larger and smaller diameter ends and a ferrule adapted to be axially driven about the exterior of the body when the latter is end located by its larger diameter end in a hole therefor in parent material whereby the ferrule is expanded as a result of co-action with the body. The ferrule is annularly grooved to provide one or more forwardly directed portions therefrom shown of forwardly and outwardly inclined taper form at or adjacent the leading end of the ferrule and having a thin section connection therewith at the annular groove or grooves so that on axial co-action of the ferrule with the body the forwardly directed portion or portions effect radial expansion of the ferrule into taper engagement with the wall of the hole in order to lock the ferrule and body in the hole with a taper locking action against axial pull out. Where two or more successive forwardly directed portions are provided they have a telescopic or collapsing action so that a subsequent forwardly directed portion is expanded by a preceding one.
REFERENCES:
patent: 3427919 (1969-02-01), Lerich
patent: 3465637 (1969-09-01), Cushman
patent: 4307986 (1981-12-01), Barnsdale
Adbar (Patent Co.) Limited
Wolfe Robert L.
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