Damped heat shield

  • US 5,590,524 A
  • Filed: 06/13/1994
  • Issued: 01/07/1997
  • Est. Priority Date: 05/14/1992
  • Status: Expired due to Term
First Claim
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1. A damped heat shield for an exhaust system of an internal combustion engine, comprising two metal layers shaped to conform generally to the shape of a high temperature portion of said exhaust system while being spaced away therefrom by an air gap, said metal layers having substantially the same shape and extending in face-to-face adjacency, a layer of sound and heat shielding material positioned between said two metal layers, one of said metal layers having a first predetermined thickness and having a first resonant frequency, the other of said metal layers having a second predetermined thickness substantially different from said first predetermined thickness and having a second resonant frequency substantially different from said first resonant frequency causing said shield to damp vibrational energy, said shield being adapted to be fixed in relationship to said high temperature portion so as to provide said air gap.

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