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. 13, 2005
Filed:
Apr. 16, 2003
Klaus J. Peter, Natick, MA (US);
Osama Ibrahim, Westborough, MA (US);
Peter Willey, East Providence, RI (US);
Zachary Nardi, Cumberland, RI (US);
Amin Saeid, Milford, MA (US);
Klaus J. Peter, Natick, MA (US);
Osama Ibrahim, Westborough, MA (US);
Peter Willey, East Providence, RI (US);
Zachary Nardi, Cumberland, RI (US);
Amin Saeid, Milford, MA (US);
Rypos, Inc., Medway, MA (US);
Abstract
A diesel particulate filter construction, for filtering particulate from a flow of exhaust, includes a first layer of electrically resistive metal filter material in line with the flow of exhaust with particulate therein and a second layer of electrically resistive filter material which is also in line with the flow of exhaust with particulate therein. The layers are pleated cylinders concentrically positioned relative to one another. Current from a power supply is routed through the first layer and the second layer, which are electrically connected in series to one another. The layers are positioned so that exhaust flows through both the layers. Sufficient heat is generated by the flow of current through the layers to generate heat to, in turn, burn off entrapped particulate. The layers may be made of made of different materials of different fiber sizes or coated with different catalysts to generate different amounts of heat from one another to improve the filtration characteristics of the particulate filter construction.