High efficiency, low weight and volume energy absorbent seam

Aeronautics and astronautics – Safety lowering devices – Parachutes

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Details

112417, B64D 1710

Patent

active

051236168

ABSTRACT:
A parachute canopy seam joint for fastening 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 adjoining materials and employs a smaller weight and volume of material than conventional radial seams and seam joints.

REFERENCES:
patent: 3240451 (1966-03-01), Sepp, Jr.
patent: 3350040 (1967-10-01), Simms et al.
patent: 3429532 (1969-02-01), Sepp
patent: 3452951 (1969-07-01), Wilson
patent: 3856240 (1974-03-01), Forbis
patent: 4117993 (1978-10-01), Palm et al.
patent: 4343448 (1982-08-01), Johnson
patent: 4390149 (1983-06-01), Barnes et al.
patent: 4637330 (1987-01-01), Shewmon
Dan Poynter, The Parachute Manual, 1984 pp. 474, 481-483.
Federal Standard (FED.STD) No. 751a, Jan. 25, 1965 Parts I and II.
E. G. Ewing, H. W. Bixby, T. W. Knacke, Recovery System Design Guide, Dec. 978 pp. 95-96, 181-186.

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