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:
Oct. 23, 2012
Filed:
Feb. 20, 2009
Sairam P. Thiagarajan, Dunlap, IL (US);
Stephan D. Roozenboom, Washington, IL (US);
Raymond B. Gerges, Peoria, IL (US);
Jinhui Sun, Bloomington, IL (US);
Shashank Mupparapu, Peoria, IL (US);
Tetsu O. Velasquez, Washington, IL (US);
Yung T. Bui, Peoria, IL (US);
Sairam P. Thiagarajan, Dunlap, IL (US);
Stephan D. Roozenboom, Washington, IL (US);
Raymond B. Gerges, Peoria, IL (US);
Jinhui Sun, Bloomington, IL (US);
Shashank Mupparapu, Peoria, IL (US);
Tetsu O. Velasquez, Washington, IL (US);
Yung T. Bui, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A reductant dosing system for a machine having an engine and an exhaust system is disclosed. The reductant dosing system has a tank configured to hold a reductant, a dosing arrangement, and a supply passage connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank.