Flush bolt mechanism

A flush bolt mechanism mounted on a free edge of one of a pair of active and inactive swing doors received in a frame, the flush bolt mechanism comprising:

• a mounting assembly comprising at least one substantially flat plate mounted on the one of the active and inactive swing doors, and a support bracket secured to the flat plate;
• a trigger assembly connected to the mounting assembly, the trigger assembly comprising a trigger member reciprocally movable relative to the flat plate, a slide guide bracket secured to the flat plate, and a plunger reciprocally movable and mounted in the slide guide bracket, the plunger connected to the trigger member;
• a linkage assembly connected to the trigger assembly, the linkage assembly comprising a post having a first end slidingly mounted in the plunger, a linkage plate coupled to a second opposite end of the post, a rod link having a first end connected to the linkage plate and opposed to the post, a resilient member surrounding the rod link, and a latch link having a first end connected to a second opposite end of the rod link;
• a bolt header connected to a second opposite end of the latch link;
• and
• a guide mounted on the frame and corresponding in position to the bolt header;
• wherein when the active swing door is in a closed position relative to the inactive swing door, the trigger member is retracted and drives the plunger to move the post and thereby drive the linkage assembly to allow the bolt header to be engaged with the guide;
• when the active swing door is in an opened position relative to the inactive swing door, the resilient member of the linkage assembly biases the post to allow the trigger member to extend out of the flat plate, such that the bolt header is disengaged from the guide.