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:
Apr. 19, 1988
Filed:
Nov. 14, 1986
Will W Mathews, Germantown, TN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
A thrust bearing and cone locking assembly for rotatably mounting the cutter cones on a rock drill bit is provided. The assembly includes a dual function thrust bearing and cone retainer capable of absorbing radial thrust and axial thrust in opposite directions. One end of the thrust bearing is received in a central channel in a journal leg mounted on the bit body and is secured to the journal leg by a circular cross-section snap ring. The other end of the thrust bearing is received in a corresponding confugured receptacle in the cone and is locked to the cone by a dual function rectangular cross-section snap ring which both secures the cone to the thrust bearing and absorbs axial thrust loads. A separate radial thrust bearing is additionally provided between the journal and the cone. A lubricant supply system contained within the assembly provides lubricant directly to all the bearing structures.