Patent ID: 6554326
Filing Date: 2003-04-29
Classification: E05B,E05C,Y10T

Abstract:
An electromagnetic locking mechanism comprising:(a) a rotary lock bolt rotatably reciprocable between a normally protruding locking position relative to a lock bolt aperture and a retracted unlocking position on a forced rotation thereof by an external opening force; (b) urging means for normally urging said rotary lock bolt to said normally protruding locking position; (c) a blocking member reciprocable between a blocking position and an unblocking position for respectively preventing and enabling said forced rotation of said rotary lock bolt; characterized in that said rotary lock bolt has a cam surface, said urging means is constituted by a lock bolt urging member having a leading portion with an abutment surface in continuous abutting engagement with said cam surface, and being linearly reciprocable from a normally protruding biased position relative to said lock bolt aperture for urging said rotary bolt to said normally protruding locking position to a retracted position in a single continuous movement during said forced rotation of said rotary lock bolt, said leading portion and said rotary lock bolt delimit an imaginary square having a diagonal substantially parallel to said abutment surface, and said blocking member prevents a rearward displacement of said lock bolt urging member from said normally protruding biased position to said retracted position in said blocking position and enables said rearward displacement in said unblocking position, further including electromagnetic means operatively coupled to said blocking member which when energized causes said blocking member to shift from said blocking position to said unblocking position.