Expandable baffle apparatus

  • US 5,506,025 A
  • Filed: 01/09/1995
  • Issued: 04/09/1996
  • Est. Priority Date: 01/09/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A lightweight expandable baffle apparatus for sealing a cavity of a vehicle body at a predetermined cross section of the cavity, the apparatus comprising:

  • a piece of heat expandable sealing material that is formed in a shape corresponding to but smaller than the shape of the cross section of the cavity, the sealing material having an activation temperature lower than 149°

    C. at which the material expands; and

    a rigid support element for supporting the piece of sealing material at the predetermined cross section while the apparatus is subjected to the activation temperature and the sealing material expands to seal the cavity at the cross section,the support element being formed of a material having a melting point higher than the activation temperature, and including an open lattice formed of a shape corresponding to but smaller than the shape of the piece of sealing material and including a peripheral strip and a plurality of crossed strips interior of and connected to the peripheral strips,the piece of sealing material being supported on the lattice so that when the sealing material is activated, the material expands radially beyond the support element to fill the cross section of the cavity and longitudinally both through and away from the lattice within the cavity.

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