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:
Jul. 03, 2007
Filed:
Sep. 23, 2004
Lance T. Richman, Ponca City, OK (US);
Chris Edward Cawthorne, The Woodlands, TX (US);
Kirk A. Norris, Sand Springs, OK (US);
Robert H. Slaughter, Jr., Ponca City, OK (US);
Lance T. Richman, Ponca City, OK (US);
Chris Edward Cawthorne, The Woodlands, TX (US);
Kirk A. Norris, Sand Springs, OK (US);
Robert H. Slaughter, Jr., Ponca City, OK (US);
Smith International, Inc., Houston, TX (US);
Abstract
Methods and apparatus for maintaining lubrication of rolling cone cutters mounted on journal pins. Embodiments comprise a rotating cone disposed on a journal pin and forming a journal gap there between. A cylindrical journal sleeve is disposed in the journal gap. The journal sleeve has a longitudinal gap forming opposing end portions, which are continuously contoured. A lubrication port is disposed in the journal pin and in fluid communication with a lubrication supply. The lubrication port has an outlet located in a recess in the journal gap. Each end of the recess comprises a transitioning surface extending between the bottom of the recess and the outer surface of the journal pin to prevent sharp transitions. In certain embodiments, the journal pin may comprise two or more lubrication ports, each located in a recess with transitioning surfaces.