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:
Aug. 09, 1977
Filed:
Nov. 24, 1975
Applicant:
Inventor:
John J Tuzson, Evanston, IL (US);
Assignee:
Borg-Warner Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417424 ; 92 83 ; 310 87 ;
Abstract
Submersible electric motors, i.e., those which operate in water or brine wells, are protected against the entry of the well liquid which may contain foreign matter by being submersed in a neutral liquid, such as refined oil. Apparatus is provided which includes a float to sense the interface between the oil inside the electric motor and the well fluid outside the motor, which float and a cooperating valve and an auxiliary oil pump provides a regulated flow of oil to maintain the interface of the oil and well fluid at a fixed location. The intrusion of motor damaging well fluid into the motor is prevented.