US 11,807,370 B2
Aircraft emergency parachute deployment system
Boris Popov, Stillwater, MN (US); and Urik Popov, Stillwater, MN (US)
Appl. No. 18/012,556
Filed by Boris Popov, Stillwater, MN (US); and Urik Popov, Stillwater, MN (US)
PCT Filed Jun. 23, 2021, PCT No. PCT/US2021/038782
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2022/031377, PCT Pub. Date Feb. 10, 2022.
Claims priority of provisional application 63/042,938, filed on Jun. 23, 2020.
Prior Publication US 2023/0264821 A1, Aug. 24, 2023
Int. Cl. B64D 17/80 (2006.01); B64D 17/72 (2006.01)
CPC B64D 17/80 (2013.01) [B64D 17/725 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An aircraft emergency parachute deployment system, comprising:
an emergency parachute comprising:
a parachute canopy, parachute lines connecting said canopy to said aircraft, and a lanyard having first and second ends, the first end attached to a top skin of said canopy; and
a two-stage rocket assembly, comprising first and second rocket motor stages, said two-stage rocket assembly being connected to said second end of said lanyard;
wherein said first rocket motor stage is configured to provide a thrust-to-weight ratio greater than one when considering the weight of said two-stage rocket assembly, said lanyard, said parachute canopy and said parachute lines; and
wherein said second rocket motor stage is configured to provide a thrust-to-weight ratio greater than one when considering the weight of said aircraft.