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. 02, 2018
Filed:
Aug. 22, 2012
George Muntean, Columbus, IN (US);
Nachiket Pawar, Maharashtra, IN;
Kundana Inala, Columbus, IN (US);
Steve Holl, Columbus, IN (US);
Stephanie Apewokin, Columbus, IN (US);
Cynthia Gosselin, Mableton, GA (US);
Andrew Myer, Greenwood, IN (US);
Jim F. Burke, Columbus, IN (US);
John Heichelbech, Columbus, IN (US);
George Muntean, Columbus, IN (US);
Nachiket Pawar, Maharashtra, IN;
Kundana Inala, Columbus, IN (US);
Steve Holl, Columbus, IN (US);
Stephanie Apewokin, Columbus, IN (US);
Cynthia Gosselin, Mableton, GA (US);
Andrew Myer, Greenwood, IN (US);
Jim F. Burke, Columbus, IN (US);
John Heichelbech, Columbus, IN (US);
Cummins Emission Solutions, Inc., Columbus, IN (US);
Abstract
Urea solution pumps having leakage bypass flowpaths and methods of operating the same are disclosed. Certain embodiments are pump apparatuses including an inlet passage in flow communication with a source of urea solution and a pump chamber, an outlet passage in flow communication with the pump chamber and an exhaust after treatment system, a diaphragm facing the pump chamber and coupled with an actuator, a first housing member coupled with a second housing member form a seal around the pumping chamber, a leak collection chamber surrounding the seal, and a return passage in flow communication with the leak collection chamber and the inlet passage. Urea solution that leaks from the pump chamber past the seal is received by the leak collection chamber and flows through the return passage to the pump inlet passage.