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:
Mar. 13, 1979
Filed:
Mar. 23, 1978
Alison R Bunting, Houston, TX (US);
Martin J Sharki, Houston, TX (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
An improved rotary drill head is provided having two lip seals installed in a seal cavity to provide a long lasting dynamic seal. The first lip seal is installed with the heel first and the second lip seal is installed with the lip first. Lubricant is maintained between the two seals at a pressure greater than the operating pressure of the rotary drill head. The lubricant pressure energizes the two lip seals. The abrasive fluid from the borehole is prevented from leaking past the seals because of the pressure differential. An infinitesimal amount of lubricant will leak past the lips of the seals thereby lubricating the seal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile