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. 02, 1996
Filed:
May. 05, 1994
Eric N Freeman, Sapulpa, OK (US);
David L Blevins, Tulsa, OK (US);
Gene R Ralls, Tulsa, OK (US);
Bill D Andrew, Tulsa, OK (US);
Buddy A Wilson, Sapulpa, OK (US);
Coy D Osburn, Tulsa, OK (US);
TDW Delaware, Inc., Tulsa, OK (US);
Abstract
An apparatus for plugging the interior of a pipe that is penetrated by an axis opening including an upright tubular plugger housing attachable at its lower end to have communication with the interior of the pipe through the opening. An elongated vertical cylindrical control bar is provided with a plugger at its lower end, the plugger being positioned through the opening into the interior of the pipe to close against further flow of fluid through the pipe. A jack is affixed to the plugger housing upper end and telescopically receives the control bar, the jack being pivotally affixed to the housing so that the control bar, having a plugger on the lower end thereof, can be pivoted relative to the housing and thereby relative to the pipe for proper positioning of the plugger in the pipe. The jack serving to axially downwardly or upwardly advance the control bar so that a plugger can be installed or removed from a pipe, the jack providing force to expand a sealing cup on the plugging head to seal the inside of the pipe. A control bar clamp and latch are used for locking the plugger head in the plugging position.