Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1990-06-29
1992-03-10
Luebke, Renee S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 55, 4052591, E21D 2100, F16B 1310
Patent
active
050945777
ABSTRACT:
An expansion shell assembly of the type including a pair of unitary expansion shell elements, each having two leaf members joined adjacent their lower ends by bridge portions with a bail fixedly attached at terminal ends to outer surfaces of the bridge portions to maintain the expansion shell elements in assembled relation. The bridge portions include a recessed area extending continuously between its upper and lower edges. The recessed areas are divided into two portions, with the lower portions substantially narrower than the upper portions, wherein terminal ends of the bail are secured. Opposing edges of the shell elements are in spaced, substantially parallel relation with the space therebetween free of any structure extending into such space over the full axial length of the shell elements. Relieved areas extend into the inner surfaces of the bridge portions to provide a clearance for the lower end of a tapered camming plug which is moved between the shell elements to effect radial expansion thereof.
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Clark Carl A.
Wright Raymond L.
Boucher Darnell M.
Luebke Renee S.
McGuire Charles S.
The Eastern Company
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