Patent ID: 7278816
Filing Date: 2007-10-09
Classification: B60P

Abstract:
1. A locking mechanism for a double articulating hook lift apparatus usable for loading, unloading, transporting and dumping of containers removably positionable upon a vehicle having a fixed frame comprising: A. a lift powering means being longitudinally extensible and retractable and being attached with respect to the fixed frame of the vehicle; B. a container engaging mechanism attached to said lift powering means to be movable therewith, said container engaging means also being pivotally movably attached with respect to the fixed frame of the vehicle at a positioned spaced remotely from said lift powering means to allow pivotal movement of said container engaging mechanism with respect to the fixed frame responsive to extension and retraction of said lift powering means to facilitate container handling, said container engaging means comprising: C. a locking means movable between a locked position preventing pivotal movement of said arm means with respect to said pivot frame means about said second articulation axis and an unlocked position allowing pivotal movement of said arm means with respect to said pivot frame means about said second articulation axis, said jib means being operative responsive to movement thereof to said retracted position to urge movement of said locking means to the unlocked position, said jib means being operative responsive to movement thereof to said extended position to urge movement of said locking means to the locked position, said locking means including: A. a link arm rotationally movably mounted to said container engaging mechanism; B. a locking plate pivotally movably mounted to said container engaging mechanism; and C. locking linkage means connected to said link arm and said locking plate to cause movement of said locking plate of said locking means between the locked position and the unlocked position responsive to rotational movement of said link arm.