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:
Jan. 06, 2009
Filed:
Jan. 27, 2006
Applicants:
Robert J. Monson, St. Paul, MN (US);
Jianhua Yan, Prior Lake, MN (US);
Charity R. Van Dusen, Apple Valley, MN (US);
Inventors:
Robert J. Monson, St. Paul, MN (US);
Jianhua Yan, Prior Lake, MN (US);
Charity R. Van Dusen, Apple Valley, MN (US);
Assignee:
Lockheed Martin Corporation, Bethesda, MD (US);
Primary Examiner:
Int. Cl.
CPC ...
F01N 1/24 (2006.01); F01N 1/04 (2006.01); F01N 1/10 (2006.01); F01N 1/02 (2006.01); F01N 1/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An engine muffling system includes a Helmholtz tuning chamber to meet the changing acoustic muffling requirements associated with multiple applications. The engine muffling system in one embodiment includes at least one chamber configured as a plenum device, typically filled with an aggregate material or acoustic absorbing particulate material(s) in order to produce a tortuous path through the at least one chamber.