The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2001
Filed:
Feb. 19, 1999
David Mallis, The Woodlands, TX (US);
Hydril Company, Houston, TX (US);
Abstract
In a threaded connector, a box member has at least two tapered, internal, generally dovetail-shaped threads. The internal threads each having stab flanks, load flanks, roots, crests and a wedge ratio and increasing in width in one direction. A pin member has at least two tapered, external, generally dovetail-shaped threads. The external thread has stab flanks, load flanks, roots, crests and a wedge ratio and increases in width in the other direction so that complementary roots and crests of the internal and external threads move into engagement during make-up of the connection in conjunction with the moving of complementary stab and load flanks into engagement upon make-up of the connection. The wedge ratio of one thread is an aggressive wedge ratio with a larger magnitude and the wedge ratio of the another thread is a conservative wedge ratio with a smaller magnitude. Alternatively, a box member has a tapered, internal, generally dovetail-shaped thread incorporated in a two-step configuration and a pin member has a tapered, external, generally dovetail-shaped thread incorporated in two-step configuration. The wedge ratio of one step is an aggressive wedge ratio with a larger magnitude and the wedge ratio of the other step is a conservative wedge ratio with a smaller magnitude.