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Device for sealing the end of sheath pipe

  • US 3,964,754 A
  • Filed: 05/19/1975
  • Issued: 06/22/1976
  • Est. Priority Date: 05/19/1975
  • Status: Expired due to Term
First Claim
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1. Sealing means whereby a main pipe can be concentrically supported inside a sheath pipe that has an inside diameter substantially larger than the outside diameter of the main pipe, and whereby the main pipe is protected against vibration and the like imparted to the sheath pipe and entry of foreign matter into the space between the pipes is prevented, said sealing means comprising:

  • A. a pair of annular sealing elements of resiliently yieldable material, each of said sealing elements1. being substantially cup-shaped in cross section to havea. a concave surface that faces in one axial direction and terminates at substantially coplanar inner and outer edges of the sealing element andb. a convex surface that faces in the opposite direction,2.

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