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:
Nov. 10, 1992
Filed:
Aug. 13, 1991
Applicant:
Inventor:
Folke Landquist, Balsta, SE;
Assignee:
ITT Flygt AB, Solna, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ; F16K / ;
U.S. Cl.
CPC ...
417299 ; 417360 ; 251 57 ;
Abstract
The pressure side of a submersible pump unit is provided with a valve device which during certain periods of operation opens a connection between the submersible pump and the pump station to obtain the necessary circulation of the waste water in the station. The opening and closing of the valve device is effected by a ball which is controlled by the submersible pump pressure.