Raisable landing gear having a shortenable leg

Details Raisable landing gear having a shortenable leg Raisable landing gear having a shortenable leg

1993-02-25

1994-04-05

Barefoot, Galen L.

Aeronautics and astronautics

Landing gear

Retractable

244102R, B64C 2510

Patent

active

052997618

ABSTRACT:
The invention relates to raisable landing gear having a shortenable leg, including a shock absorber fitted with a plunger rod, and a linkage connecting said plunger rod to the strut of the shock absorber, under the control of a resilient connecting rod having a threshold, serving to pull on the shock absorber when the leg is raised. According to the invention, the linkage includes two arms forming an alignment, with a first arm hinged on the plunger rod and having a lateral appendix whose free end is capable of co-operating with a stationary cam secured to the structure of the airplane, and a second arm which is hinged to the strut. The lateral appendix and the stationary cam are organized to operate in an emergency, in the event of the threshold connecting rod failing, thereby ensuring that the shock absorber is extended and that said lengthened shock absorber is locked in the undercarriage-down position.

REFERENCES:
patent: 2319446 (1943-05-01), Dowty
patent: 4561612 (1985-12-01), Masclet
patent: 4749152 (1988-06-01), Leaux et al.

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