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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.:

US 10589449 B1

PDFFull Text
Date of Patent:
Mar. 17, 2020

Filed:

Aug. 14, 2015

Stator injection molding centralization

Applicant:

Halliburton Energy Services, Inc., Houston, TX (US);

Inventors:

Richard David Peer, Katy, TX (US);

Byong Jun Kim, Sugar Land, TX (US);

Assignee:

Halliburton Energy Services, Inc., Houston, TX (US);

Attorney:

Haynes and Boone, LLP

Primary Examiner:

William D Hutton, Jr

Assistant Examiner:

Avi T Skaist

Int. Cl.
CPC ...
B29C 45/36 (2006.01); B29C 45/56 (2006.01); F04C 2/107 (2006.01); E21B 4/02 (2006.01); B29C 45/16 (2006.01); B29C 45/34 (2006.01); B29C 45/40 (2006.01); E21B 43/12 (2006.01); F04C 13/00 (2006.01); B29K 21/00 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
B29C 45/36 (2013.01); B29C 45/1657 (2013.01); B29C 45/34 (2013.01); B29C 45/40 (2013.01); B29C 45/56 (2013.01); E21B 4/02 (2013.01); E21B 43/126 (2013.01); F04C 2/1071 (2013.01); F04C 2/1075 (2013.01); B29C 2045/1664 (2013.01); B29C 2045/5695 (2013.01); B29K 2021/00 (2013.01); B29L 2031/7496 (2013.01); F04C 13/008 (2013.01); F04C 2230/21 (2013.01); F04C 2230/603 (2013.01); F04C 2240/10 (2013.01);
Abstract

In a stator injection molding centralization technique, a mold core is disposed inside a stator tube, thereby forming an annulus between the stator tube and mold core. The mold core includes a pitch length defined between a first and second lobe tip of the mold core. A centralizing member is positioned in the annulus, which has a length at least as long as the pitch length of the mold core. During the injection molding process, elastomeric material is injected into the annulus behind the centralizing member, which is located adjacent to the injection point. As the elastomer is injected, it displaces the centralizing member ahead of it along the annulus. As the centralizing member moves through the annulus, it supports the mold core, thus preventing the sag effect.

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