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Insulated breathing tube

  • US 5,623,922 A
  • Filed: 01/03/1995
  • Issued: 04/29/1997
  • Est. Priority Date: 09/23/1986
  • Status: Expired due to Fees
First Claim
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1. An insulated breathing tube arrangement having an air impervious corrugated tube for carrying respiratory gases and an outer casing of first internal diameter constituting means for insulating the corrugated tube said corrugated tube being located within said casing and having an outer diameter substantially less than said internal diameter of said casing, said casing being of an overall length greater than the length of said corrugated tube and being sealed at its ends to the ends of the corrugated tube thereby defining an annular insulating dead air space between said corrugated tube and said casing, said casing further being in a slightly longitudinally compressed state relative to said corrugated tube thereby causing said annular dead air space to be of irregular cross section and further providing means for facilitating sharp bends in said tube arrangement said casing further being of a thickness which is less than the thickness of said corrugated tube.

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