AIR CUSHION VEHICLE STERN SEAL

This patent discloses an improved stern seal construction for air cushion supported marine vessels. It consists of an array of inflatable, vertically-oriented inverted truncated open-ended cones or fingers. These fingers are individually attached and mounted to depend in side-by-side relation from the bottom of an inflatable bag which in turn is mounted upon and extends transversely across and below the bottom of the stern end of the vessel's hull. The fingers are arranged in side-by-side pressed-together relationship, and thus assume, in horizontal section, generally rectangular forms. In side-view sectional profile, the finger and bag contours are so balanced that a minumum load at the bottom ends of the fingers will permit them to be raised to allow for passages over rough objects. The front or leading panels of the fingers are stiffened somewhat toward their bottom ends, and are extended under the bottom of each finger in the manner of a flap valve, preventing water or other terrain material from entering the bottom of the finger, which would otherwise permit undesirable scooping into the air cushion stern seal system. The fingers are preferably tapered in rear view at their bottom ends so as to provide an improved inflated shape stability performance for each finger when the ship is operating over a terrain surface that intermittently 'falls away' from the bottoms of the fingers.

  • Supplemental Notes:
    • Report; Supersedes PAT-APPL-7-244-582
  • Corporate Authors:

    Department of the Navy

    Washington, DC  United States 
  • Authors:
    • Bell, J C
  • Publication Date: 1989-5-30

Subject/Index Terms

Filing Info

  • Accession Number: 00659536
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM