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:
Oct. 30, 1979
Filed:
Aug. 07, 1978
Applicant:
Inventor:
Wilbur S Keller, Arlington, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21K / ; B21D / ;
U.S. Cl.
CPC ...
7610 / ; 7520 / ; 2914 / ; 308-82 ; 308237 ;
Abstract
A rolling cone earth boring bit is produced having a bearing surface that has been infiltrated to a controlled depth. A groove is machined in one of the bearing members. The bearing member is placed in a die and an alloy powder material is pressed into the groove recess thereby producing a porous matrix for the bearing element. The bearing element is sintered to provide a porosity within the range of 10% to 20%. An anti-galling material is infiltrated into said porous matrix bearing element. The porous matrix bearing element is hardened resulting in a high-strength bearing that will provide performance with high loads at low RPM or high RPM.