US Patent 7267185 Bit retainer system

Patent 7267185 was granted and assigned to Smith International on September, 2007 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Smith International

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

72671850

Patent Inventor Names

Lance D. Underwood0

Ronald G. Schmidt0

Date of Patent

September 11, 2007

Patent Application Number

109840190

Date Filed

November 8, 2004

Patent Primary Examiner

‌

David Bagnell

Patent abstract

A bit retainer system comprising a casing, a driver sub adapted to be disposed around a shank of a bit, and a bit retainer. The driver sub comprises a threaded connector, a threaded pin end configured to engage with the hammer case, and a stop. The bit retainer comprises a load carrying threaded connector configured to engage with the threaded connector of the driver sub, and a catch thread configured to retain the head of a bit to the system.

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