Aeronautics and astronautics – Safety lowering devices
Patent
1993-06-30
1995-02-28
Barefoot, Galen L.
Aeronautics and astronautics
Safety lowering devices
188371, 188377, 244147, B64D 1736
Patent
active
053930169
ABSTRACT:
A shock energy absorbing device provides shock protection for the riser l employed to attach an aerodynamic deceleration device to a primary body during deployment of the system into an airstream. During deployment, for example, by dropping an unopened parachute and attached load or by rocket delivery of the unopened parachute and attached load, the parachute is made to open at a desired altitude wherupon very large shock tension forces are generated which are applied to the line. In order to protect the line from failing under these forces and to reduce the requirement for a bulky, heavy line, a shock absorber is provided in the form of a block having one or more breakable web portions formed therein and through which the riser line is threaded. Upon deployment of the system into an airstream, the shock tension forces operate to fracture some or all of the breakable web portions thereby dissipating the shock energy generated during deployment and protecting the riser line from failure.
REFERENCES:
patent: 2474124 (1949-06-01), Shultz
Beatty David A.
Howard C. Douglas
LaGrange Donald E.
Littman David C.
Barefoot Galen L.
Connors, Jr. Edward J.
The United States of America as represented by the Secretary of
Townsend William C.
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