Force-limiting device for an aircraft landing gear shock absorber, and a shock absorber including such a device
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United States of America Patent
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Jul 19, 1994
Grant Date -
N/A
app pub date -
Dec 2, 1992
filing date -
Dec 11, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a force-limiting device for aircraft landing gear shock absorbers, in particular for helicopters, and also to a shock absorber fitted with such a device. According to the invention, a box 201 is provided that forms a partition in the main body 101 of the shock absorber, the box having a bottom 202 whose central portion has a diaphragm 210 with small throttling orifices 211 and force-limiting members also being provided comprising firstly an annular valve member 225 disposed around the diaphragm 210 such that when open it allows a large volume of hydraulic fluid to pass through the box in a very short time, and a resilient return member 226 holding the annular valve member 225 in its closed position, but allowing the valve member to open above a predetermined threshold.
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