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:
Jun. 17, 2008
Filed:
Oct. 18, 2006
Anton F. Zahradnik, Sugarland, TX (US);
Terry J. Koltermann, The Woodlands, TX (US);
Don Q. Nguyen, Houston, TX (US);
Aaron J. Dick, Houston, TX (US);
Eric Sullivan, Houston, TX (US);
Scott Shiqiang Shu, Spring, TX (US);
Anton F. Zahradnik, Sugarland, TX (US);
Terry J. Koltermann, The Woodlands, TX (US);
Don Q. Nguyen, Houston, TX (US);
Aaron J. Dick, Houston, TX (US);
Eric Sullivan, Houston, TX (US);
Scott Shiqiang Shu, Spring, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
An earth boring bit has a bearing pin with a sleeve mounted on it. The sleeve is fixed against rotation but able to float relative to the bearing pin. A cone fits over and forms a bearing surface with the sleeve. The sleeve and bearing pin are configured to have a clearance between them that has a forward portion that progressively decreases in a rearward direction. The clearance progressively decreases in a forward direction from the rearward end of the sleeve. The cone and the sleeve are able to tilt in unison with each other relative to the bearing pin when the bit is loaded.