Crashworthy landing gear shock

Details Crashworthy landing gear shock Crashworthy landing gear shock

1997-12-05

1999-08-31

Jordan, Charles T.

Aeronautics and astronautics

Landing gear

Wheel

244100R, 244104R, 267 6413, 267 6415, 188289, 18818214, B64C 2558

Patent

active

059442832

ABSTRACT:
A shock absorber, optionally operable as a retractable landing gear actuator, includes a sealed cylinder divided by a cylinder head to define an upper chamber and a lower chamber, the lower chamber further divided by a piston having a piston rod passing in sealed manner through the lower cylinder end. The cylinder head includes one or more orifices, the effective opening of each orifice controlled by a valve, the valve having a stem attached to and passing through the upper cylinder end to the atmosphere, such that the pressure between the piston and the cylinder head is limited to a certain value above atmospheric pressure, regardless of the velocity or position of the piston. The valve is forced toward the closed position by a spring against a stop such that it is always at least partially open. During hard or crash landings, high fluid pressure on the piston or in the upper chamber forces the valve further open.

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