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. 27, 2007
Filed:
Apr. 26, 2006
Applicant:
Russell Robert Graze, Jr., Dunlap, IL (US);
Inventor:
Russell Robert Graze, Jr., Dunlap, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for controlling the flow through an exhaust sampling system includes sensing an operating characteristic of a power source, extracting a sample of an exhaust flow of the power source, combining the sample with an additional flow of fluid, and measuring a particulate level of the combined flow. A flow rate of the extracted sample is controlled to be substantially proportional to a flow rate of the exhaust flow based on a difference between the combined flow and the additional flow.