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Thermal insulated doorsill apparatus with insulating spacer fastener

  • US 4,399,636 A
  • Filed: 10/21/1981
  • Issued: 08/23/1983
  • Est. Priority Date: 10/21/1981
  • Status: Expired due to Fees
First Claim
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1. Doorsill apparatus for installation beneath an exterior door, comprising:

  • an outer doorsill member of metal extending outside of said door and having a first projection thereon;

    an inner doorsill member of metal extending inside of said door having a second projection thereon;

    spacer clip means of synthetic plastic material for fastening said outer sill member and said inner sill member together against relative movement by clipping onto said first and second projections, said clip means spacing said outer sill member from said inner sill member for heat insulation thereof and including a bridge portion extending across the space between said inner and outer sill members providing a substantially continuous upper surface from said inner sill member to said outer sill member.

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