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:
Feb. 07, 2006
Filed:
Nov. 12, 2002
Colin C. Chen, Barrington, IL (US);
Frank W. Popielas, Naperville, IL (US);
Mark Boogemans, Belmont, CA;
Calin Matias, London, CA;
Ryan P. Moffat, London, CA;
Marsha A. Minkov, Wheeling, IL (US);
Colin C. Chen, Barrington, IL (US);
Frank W. Popielas, Naperville, IL (US);
Mark Boogemans, Belmont, CA;
Calin Matias, London, CA;
Ryan P. Moffat, London, CA;
Marsha A. Minkov, Wheeling, IL (US);
Dana Corporation, Toledo, OH (US);
Abstract
An improved heat shield provides for reduced noise transmission of vehicular engine components is disclosed. The heat shield has three layers; a first sheet layer, a center insulation layer, and a second sheet layer. The insulation layer is positioned between the first and second sheet layers. The first sheet layer is defined by a variable shaped periphery that is folded over the periphery of the second sheet layer to form a hem having a variable length around the heat shield. The variable length serves to reduce uneven strain in the hem area experienced during crush forming the heat shield into the final shape. Further, the variable length of the hem also serves to alter the resonate frequency of the heat shield in specific areas to reduce vibration and improve acoustical properties.