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Reserve parachutes

  • US 4,467,986 A
  • Filed: 09/02/1981
  • Issued: 08/28/1984
  • Est. Priority Date: 12/15/1976
  • Status: Expired due to Fees
First Claim
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1. In a reserve parachute for deployment at low speeds of descent and including a reserve parachute pack, a main reserve canopy, and rigging lines attached to said canopy, said canopy and rigging lines being packed within said reserve parachute pack for deployment therefrom;

  • said main reserve canopy including an apex, an apex area, a skirt defining a canopy mouth, and expander means for expanding a portion of said canopy; and

    restraint means attached to said reserve parachute pack and to a selected point along said rigging lines for allowing only a given length of rigging lines to said selected point to be deployed initially, said expander means providing an induced initial canopy deployment at said low speeds of descent having a drag profile with a greater drag action on said apex area of said canopy than that acting on said skirt, said restraint means operatively interacting with said expander means to facilitate said induced initial canopy deployment and said expander means enabling use of said restraint means in a reserve parachute, and said restraint means being operative after said induced initial canopy deployment to release the remainder of said rigging lines for full parachute deployment.

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