Patent ID: 7883125
Filing Date: 2011-02-08
Classification: B64C,E05B,E05C,Y10S,Y10T

Abstract:
1. A locking mechanism for engaging and retaining a movable member, wherein the mechanism includes a hook member mounted for angular displacement about a first axis such that the hook member is movable into and out of retaining engagement with the movable member, a latch member mounted for angular displacement about a second axis parallel with the first axis, the latch member having a portion thereof spaced from the second axis, which can be located to prevent movement of the hook member out of retaining engagement with the movable member, and first and second actuators each operable to rotate the latch member about the second axis such that the portion is movable to a position where it does not prevent movement of the hook member out of retaining engagement with the movable member, and that the second actuator is a rotary actuator for use in case of failure of the first actuator, the second actuator includes a cam arranged for rotation about a third axis parallel to the second axis and to the first axis located to engage a part of the latch member, wherein the cam includes a peripheral cam surface engageable with the part of the latch member such that a radial distance between the third axis and the cam surface engaged with the part of the latch member increases as the cam is rotated by the rotary actuator, and wherein the hook member includes an angled contact surface configured to contact the portion of the latch member such that a force applied by the contact surface to the portion of the latch member rotates the portion into engagement with the hook member and limits a rotation of the hook member.