Ground sensing system

Details Ground sensing system Ground sensing system

2009-04-02

2011-12-20

Michener, Joshua (Department: 3644)

Aeronautics and astronautics

Landing gear

Wheel

C244S10300W

Reexamination Certificate

active

08079548

ABSTRACT:
A ground sensing system for an aircraft attaches to the aircraft's landing gear to provide a ground touch indication. The ground sensing system includes a bracket, an upper arm, a lower arm, a roller and a sensor. The bracket is mounted to the landing gear while the upper arm is pivotally and biasly coupled to the bracket. The lower arm is pivotally and biasly coupled to the upper arm. The roller mounts to the lower arm and extends just slightly beneath a lowermost surface of the tire when the aircraft is airborne. The sensor is triggered once a portion of the upper arm has sufficiently entered the sensor's field of view, which occurs when the roller is urged upward by the ground during landing.

REFERENCES:
patent: 2477881 (1949-08-01), King
patent: 2677516 (1954-05-01), Pilling
patent: 2692098 (1954-10-01), Schmued et al.
patent: 3129903 (1964-04-01), Dewar et al.
patent: 3680885 (1972-08-01), DeCardi et al.
patent: 5801301 (1998-09-01), Jeong
patent: 7439852 (2008-10-01), Pledger
patent: 7731124 (2010-06-01), Griffin

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