RAM air parachute with multistage deployment

Details RAM air parachute with multistage deployment RAM air parachute with multistage deployment

2005-05-03

2005-05-03

Eldred, J. Woodrow (Department: 3644)

Aeronautics and astronautics

Safety lowering devices

Parachutes

C244S146000

Reexamination Certificate

active

06886785

ABSTRACT:
A ram air parachute of the present invention includes specific cross porting of the ribs between certain cells to create a two-stage or multi-stage deployment. Cross ports between certain sets of cells have reduced or no conductance. In this manner, the center cells of the canopy open first, slowing decent, before the outer cells. The staged deployment reduces the opening forces on the pilot particularly in high speed flights.

REFERENCES:
patent: 3945592 (1976-03-01), Sutton
patent: 4540145 (1985-09-01), Matsuo
patent: 4771970 (1988-09-01), Sutton
patent: 5005785 (1991-04-01), Puskas
patent: 5201482 (1993-04-01), Ream
patent: 5213288 (1993-05-01), Girdwood
patent: 5893536 (1999-04-01), Lee et al.
patent: 6220547 (2001-04-01), Smith et al.
International Search Report for PCT/US02/39519; mailing date: Sep. 15, 2003.

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