Patent ID: 7591157
Filing Date: 2009-09-22
Classification: E05B,E05C,Y10T

Abstract:
1. A security lock arrangement which includes: a carrier to be mounted on a wing member; at least two latch bolts extending in opposite directions displaceably arranged relative to the carrier between a retracted, unlocked position and an extended, locked position with each latch bolt having a carrier associated with it, each carrier being in the form of a carrier plate mountable to an operatively inner surface of the wing member; an urging means acting on the at least one latch bolt for urging the latch bolt to its extended, locked position; a drive means mounted on the carrier for driving at the least one latch bolt at least into its retracted position against the action of the urging means; and a displacement mechanism interposed between the drive means and the at least one latch bolt, the displacement mechanism comprising a cam member rotatably driven by the drive means, the cam member acting on a follower of the at least one latch bolt, the cam member having a maximum throw when the at least one latch bolt is proximate its retracted position.