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:
Feb. 11, 2014
Filed:
Dec. 29, 2005
Hans Henrik Jochumsen, Allerod, DK;
Niels Stubager Kiemer, Sjaelland, DK;
Karim Lindberg, Vekso, DK;
Niels Torp Madsen, Birkerod, DK;
Tom Johansen, Helsingborg, SE;
Hans Henrik Jochumsen, Allerod, DK;
Niels Stubager Kiemer, Sjaelland, DK;
Karim Lindberg, Vekso, DK;
Niels Torp Madsen, Birkerod, DK;
Tom Johansen, Helsingborg, SE;
Grundfos Nonox a/s, Bjerringbro, DK;
Abstract
The invention relates to a dosing pump unit for mixing a liquid reducing agent with an exhaust gas flow by means of a dosing pump which is connected, on the input side thereof, to a connection connectable to a reducing agent tank and, on the output side thereof, to a pressure pipe and a pipe for returning flow back to said reducing agent tank, wherein a non-return valve which is prestressed against a hydraulic pressure produced by the dosing pump is arranged in the pressure line, the return pipe is connected to the pressure pipe upstream of the non-return valve in the reducing agent flow direction and a first stop valve for selectively closing the return pipe is placed therein.