Supports – Resilient support – Including additional energy absorbing means – e.g. – fluid or...
Patent
1978-04-25
1980-05-27
Foss, J. Franklin
Supports
Resilient support
Including additional energy absorbing means, e.g., fluid or...
188 1B, 248548, B60R 2110
Patent
active
042046599
ABSTRACT:
A notched-energy absorber for attenuating high level accelerations such as ould occur during aircraft crashes, thereby avoiding injury to a user. The energy absorber force-displacement curve has a large initial spike, followed by a valley or "notch" and then by a constant force level intermediate the spike and valley levels. In one embodiment, a conventional square-response type shock absorber is connected between a vehicle seat and the vehicle body by a shearable diaphragm fixed to vehicle structure. The diaphragm shears at a notch when it experiences an initial high force, after which the conventional absorber moves freely without deforming until it encounters a stop. The conventional absorber then elongates or compresses in a conventional manner. In an alternative embodiment, a spring is connected between the seat and the vehicle body. Initially, the spring is compressed by experienced forces until at a predetermined force level it forces out a retaining clip or ring. The spring thereupon crushes a honeycomb, forming the valley or "notch." After the honeycomb is crushed, a conventional shock absorber attached thereto is compressed in a conventional manner.
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Phillips Norman S.
Walcott William B.
Foss J. Franklin
Hansen Henry
Sciascia R. S.
The United States of America as represented by the Secretary of
Weinstein Stanton D.
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