Aeronautics and astronautics – Landing gear – Retractable
Patent
1979-05-29
1980-10-21
Kelmachter, Barry L.
Aeronautics and astronautics
Landing gear
Retractable
B64C 2514
Patent
active
042289750
ABSTRACT:
A kneeling nose landing gear assembly for an airplane enables the nose of the airplane fuselage to be lowered to facilitate loading and unloading of cargo. A pair of hydraulic kneeling actuators pivotally coupled to the midsection of a pivotable landing gear strut are selectively positionable against a pair of retractable stop assemblies positioned above the strut. The actuators are pressurized against the cooperable stop assemblies to thereby cushion the descent of the airplane nose to a lowered position wherein the landing gear strut is pivoted forwardly into an angled kneeling position intermediate between an upright taxiing position and a retracted position. The kneeling actuators are subsequently pressurized to raise the nose of the airplane and swing the landing gear strut back into the taxiing position from the kneeling position. The kneeling actuators and their associated elements for providing the kneeling capability of the landing gear may be retrofitted to existing nose landing gear assemblies with negligible modification of the landing gear and without interfering with normal retraction or extension of the landing gear.
REFERENCES:
patent: 2544855 (1951-03-01), Parker
patent: 2565007 (1951-08-01), Van Zelm et al.
patent: 2575647 (1951-11-01), Winslow
patent: 2690888 (1954-10-01), Hawkins
patent: 3335981 (1967-08-01), Pauli et al.
patent: 3580531 (1971-05-01), Bock et al.
patent: 3904153 (1975-09-01), Watts
patent: 3954232 (1976-05-01), Harper
Kelmachter Barry L.
The Boeing Company
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