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:
Jan. 27, 1981
Filed:
Oct. 09, 1979
Larry G Keast, Houston, TX (US);
Herbert D Horton, Mayhill, NM (US);
World Wide Oil Tools, Inc., Houston, TX (US);
Abstract
An improved power tong apparatus for making and breaking connections between lengths of small diameter tubing comprising an annular cage mounted for rotation and on which are pivotally mounted a plurality of pipe-gripping rocker arms, an annular bull gear mounted for rotation in association with the annular cage and having internally positioned rollers mounted in association with the pivotally mounted pipe-gripping rocker arms, and an endless chain assembly or gear for rotating the bull gear, and a slot and pin assembly for restricting the movement of the bull gear with respect to the annular cage for causing the pipe-gripping rocker arms to be movable into an open position to release their grip on the pipe.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile