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:
Sep. 04, 2012
Filed:
Apr. 27, 2007
Olivier Sindt, Cheltenham, GB;
Michael Shepherd, Stroud, GB;
Hossein Akbari, Stoke Gifford, GB;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Cast material rotor () with profiled helical outer surface (). Cast material layer () can be disposed between core () and tube (). Profiled helical outer surface () can be in tubeor cast material layer, respectively. Method of forming rotorcan include filling void between outer surfaceof coreand longitudinal boreof tubehaving profiled helical outer surfacewith cast materialin fluid state, and solidifying cast material. Tubecan be disposed within profiled helical boreof mold, e.g., before solidifying cast material. Method of forming rotorcan include filling void between outer surfaceof coreand profiled helical borein moldwith cast materialin fluid state, solidifying cast materialto impart profiled helical outer surfacethereto, and removing moldfrom cast material