Patent ID: 8109465
Filing Date: 2012-02-07
Classification: B64C

Abstract:
1. An aircraft retractable landing gear assembly comprising: (a) a landing gear trunion supporting a wheel assembly pivotally mounted to the aircraft for pivoting about a trunion axis for movement between a retracted position and an extended position, the landing gear trunion including a magnetically responsive metal portion that is spaced away from the trunion axis; (b) a double acting hydraulically powered hydraulic cylinder connected between the aircraft structure and the trunion for extending the gear from its retracted position to its extended position; (c) an electro-magnet mounted to the aircraft structure positioned for engaging alignment with the magnetically responsive metal portion of the trunion when the trunion is in the retracted position, the electro-magnet switchable between an energized state and a non-energized state, whereby switching the electro-magnet to the energized state when the trunion is in the retracted position holds the landing gear in the retracted position.