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:
Sep. 21, 2010
Filed:
Jul. 21, 2005
Applicants:
David R. Booker, Wantage, GB;
Gideon Eden, Ann Arbor, MI (US);
Inventors:
David R. Booker, Wantage, GB;
Gideon Eden, Ann Arbor, MI (US);
Assignee:
Sensors, Inc., Saline, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N 1/22 (2006.01); G01N 1/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus for proportional sampling of particulate material present in the exhaust gas emitted from an engine, in order to measure the mass of particulate material present in the exhaust gas, utilizes a mixing chamber () for mixing a portion of the exhaust gas with a dilution gas. A flow control () controls the flow rate of the portion of the exhaust gas as a function of exhaust gas flow by activating individual ones of a parallel array of solenoid valves (), each defining a flow restriction ().