Force-limiting device for an aircraft landing gear shock absorbe

Details Force-limiting device for an aircraft landing gear shock absorbe Force-limiting device for an aircraft landing gear shock absorbe

1992-12-02

1994-07-19

Barefoot, Galen L.

Aeronautics and astronautics

Landing gear

Wheel

18832215, 18832213, B64C 2560

Patent

active

053301323

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.

REFERENCES:
patent: 4126212 (1978-11-01), Crawley
patent: 4506869 (1985-03-01), Masclef et al.
patent: 4630788 (1986-12-01), Yeaux et al.
patent: 4673067 (1987-06-01), Munning et al.
patent: 4711435 (1987-12-01), Harris et al.
patent: 4821983 (1989-04-01), Aubry et al.
patent: 4974707 (1990-12-01), Neumann et al.
patent: 5072812 (1991-12-01), Imaizumi
patent: 5085300 (1992-02-01), Kato et al.
patent: 5123506 (1992-06-01), Sirven
VFW-Fokker Hydraulics Aircraft Engineering vol. 46 No. 6 Jun. 1974 pp. 15-17.

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