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:
May. 30, 1989
Filed:
Nov. 23, 1987
Applicant:
Inventors:
Assignee:
Standard Telefon og Kabelfabrik A/S, Oslo, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417 46 ; 417404 ;
Abstract
An oil cable pumping plant including at least one oil tank and at least one air/gas driven piston type oil pump connected to the oil tank, at least one air/gas source connected to the air/gas inlet of the pump via a pressure control. An exit for the air/gas as well as an oil exit are connected to at least one oil filled cable, and an oil flow indicator. The pump in its normal operating condition provides a predetermined oil pressure at its outlet. An oil flow control is interconnected between the oil flow indicator and the air/gas pressure control for controlling the oil.