Accession Number : ADD015531

Title :   High Efficiency, Low Weight and Volume Energy Absorbent Seam.

Descriptive Note : Patent, Filed 9 Sep 91, patented 23 Jun 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Buckley, James A ; Hennings, Elsa J

Report Date : 23 Jun 1992

Pagination or Media Count : 7

Abstract : A parachute canopy seam joint for fastening a ribbon seam and a ribbon seam and a radial seam of a parachute canopy together. This parachute canopy seam joint combines a ribbon seam using a zigzag stitch pattern and narrow strips of radial tape sewn together with multiple rows of a straight stitch pattern. The ribbon seam attaches two overlapping ribbons within the parachute. The narrow strips of radial tape shroud the ribbon seam which result in a high strength and low weight and volume radial seam and seam joint. This new configuration of a parachute seam joint has distinct advantages in terms of strength and shock absorbing capacity. Specifically, this new parachute seam joint has a seam strength equal to or greater than the minimum rated strength of the ad-joining materials and employs a smaller weight and volume of material than conventional radial seams and seam joints.

Descriptors :   *FASTENINGS, *HIGH STRENGTH, *MATERIALS, *PARACHUTE CANOPIES, *PATENTS, *ABSORBERS(MATERIALS), CANOPIES, CONFIGURATIONS, PARACHUTES, PATTERNS, SHOCK, TAPES, VOLUME, WEIGHT, VOLUME

Subject Categories : Textiles
      Gliders and Parachutes
      Miscellaneous Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE