Patent ID: 7744349

Claim:
A lock unit usable to restrict upward rotation of a blade pitch housing attached between a rotor assembly and a helicopter blade; comprising: a base portion having, on a first side, a contact surface to contact said rotor assembly and, on a second side opposed to said first side, a first opening, the base portion configured to enable the lock unit to be removably appended to said rotor assembly; and an insertion pin device insertable through a second opening in said base portion and into an opening in said rotor assembly to removably append the lock unit to the rotor assembly; and an extendible device positioned in said first opening and extendible to an extended position to contact said blade pitch housing, the extendible device including a threaded shaft having a near end inserted into said first opening and a far end; a first nut device rotatable on said threaded shaft to adjustably extend the threaded shaft out of said first opening; an end piece extending beyond said far end of the threaded shaft and adjustable for alignment with a surface of said blade pitch housing, said end piece coupled to the far end of said threaded shaft and adjustable via a ball and socket configuration; and a second nut device rotatable on said threaded shaft to releasably secure an adjustment of the end piece.