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:
Dec. 11, 1984
Filed:
Mar. 09, 1982
Russell J Bookout, Bartlesville, OK (US);
TRW Inc., Cleveland, OH (US);
Abstract
This disclosure pertains to protection apparatus for liquid-filled submergible equipment such as downhole electric motors used in oil wells and the like. The protection apparatus provides a positive bias force on the filling liquid so that any liquid leakage through motor seals and the like takes place from the inside out. The positive bias pressure is created by a piston having a substantially constant biasing pressure applied thereto by constant force springs. The piston operates in a cylinder which communicates at its head-end with the equipment being protected. The base-end of the cylinder communicates with a conventional labyrinth-type protector for maintaining an interface between the protecting liquid and well fluid externally of the cylinder.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile