Retractable aircraft step

Details Retractable aircraft step Retractable aircraft step

1981-09-08

1984-04-03

Blix, Trygve M.

Aeronautics and astronautics

Aircraft structure

Details

16282, 16370, 2441294, B64C 124

Patent

active

044403640

ABSTRACT:
A retractable aircraft step module comprises a streamlined fairing having a recess for receiving a retractable step member which is connected to the fairing by spaced apart pivot links which together with the step member and the body member form a four bar linkage. The linkage includes a deflectable pivot connection between one of the links and the step member which provides a biasing force to maintain the step member in the retracted position. The deflectable pivot connection is provided by a pivot beam mounted on the step member and including a counterdeflection adjustment for preselecting the maximum biasing force. The step member and the fairing are adapted to mount on the exterior of an aircraft fuselage and are preferably constructed of reinforced plastic.

REFERENCES:
patent: 1176348 (1916-03-01), Culver
patent: 1866299 (1932-07-01), Ericson
patent: 2056226 (1936-03-01), Mussey et al.
patent: 2146668 (1939-02-01), Baade
patent: 2417987 (1947-03-01), McFarland
patent: 2647677 (1953-08-01), Reed
patent: 2951454 (1960-09-01), Candlin, Jr.
patent: 3363281 (1968-01-01), Borsani
patent: 3572754 (1971-03-01), Fowler
patent: 4110673 (1978-08-01), Nagy et al.

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