Pre-stressing apparatus using a split threaded fastener

Details Pre-stressing apparatus using a split threaded fastener Pre-stressing apparatus using a split threaded fastener

2007-08-21

2009-12-29

Estremsky, Gary (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Internally threaded fastener element, e.g., nut, etc.

Multipart

C411S014500

Reexamination Certificate

active

07637706

ABSTRACT:
A fastener includes a threaded circular ring half divided along a plane intersecting a central longitudinal axis. One of the end walls is formed with a truncated conical load-bearing surface that is seated on a truncated conical thrust surface formed on a circular ring of a stress generator. The load bearing and thrust generating surfaces are arranged to present a conjugate pair of truncated conical surfaces to provide a favorable resolution of forces developed by torque applied to jack bolts distributed about an outwardly surrounding cylindrical stress generator body section.

REFERENCES:
patent: 4332169 (1982-06-01), Stuart
patent: 4927305 (1990-05-01), Peterson, Jr.
patent: 5161928 (1992-11-01), Burdick, Jr.
patent: 6799930 (2004-10-01), More et al.

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