Threaded pipe connector

Details Threaded pipe connector Threaded pipe connector

2005-09-19

2009-06-23

Dunwoody, Aaron M (Department: 3679)

Pipe joints or couplings

Screw

C285S333000

Reexamination Certificate

active

07549682

ABSTRACT:
A riser connector uses a box and upset pin connector threadform design having S-shaped load flanks that provide a variable load angles depending on the radial position along the engaged teeth. This design promotes a load path that changes with position along the axial length of the engaged thread, as well as increasing or decreasing external loads on the connector. The connector also varies radial distention of the pin from the box in a manner that is different from one thread to the next. The threadform uses a combination of thread cuts that vary in shape, pitch, and/or thread cone angle to provide load and stab flanks, as well as a load path, that vary from one axial end of the engaged thread to the other.

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patent: 6722706 (2004-04-01), Church
patent: 6976711 (2005-12-01), Sivley, IV

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