Patent ID: 8079178
Filing Date: 2011-12-20
Classification: E06B

Abstract:
1. A mullion assembly for a double door comprising, in combination: a top mounting block adapted to be attached to a top beam of a door frame for a double door including first and second doors, with the door frame including two opposite side beams to which the first and second doors are pivotably mounted, with each of the first and second doors including a door lock having a latch, with the top mounting block including a positioning rod extending in a horizontal direction; a bottom mounting block adapted to be mounted on a floor and spaced from the top mounting block in a vertical direction perpendicular to the horizontal direction; a post including upper and lower ends spaced in the vertical direction, with the lower end of the post detachably engaged with the bottom mounting block, with the post further including two strikes adapted to respectively couple with the latches of the door locks when the first and second doors are in a closed state; a brace mounted to the upper end of the post; a mounting bracket mounted to the brace; a pivotal plate pivotably mounted to the mounting bracket and including a coupling slot, with the positioning rod removably received in the coupling slot of the pivotal plate, with the pivotal plate being rotatable relative to the mounting bracket between a first position and a second position about a first pivot axis perpendicular to the vertical direction, with the pivotal plate being rotatable in a first direction and not rotatable in a second direction reverse to the first direction when the pivotal plate is in the first position; a retaining member rotatably mounted to the mounting bracket about a second pivot axis perpendicular to the vertical direction and spaced from the first pivot axis in the vertical direction, with the retaining member including a locking portion and an engaging portion, with the locking portion of the retaining member being moveable between a locking position engaged with the pivotal plate and an unlocking position disengaged from the pivotal plate, with the retaining member being rotatable in the second direction and not rotatable in the first direction when the locking portion of the retaining member is in the locking position; a stop extending through the mounting bracket in the horizontal direction, with the stop abutting against the retaining member to stop the retaining member from rotating in the first direction when the locking portion of the retaining member is in the locking position; a key cylinder mounted to the brace and including a key-operable actuating member, with the actuating member being operably connected to the engaging portion of the retaining member to move the locking portion of the retaining member between the locking and unlocking positions, wherein when the pivotal plate is in the first position and the locking portion of the retaining member is in the locking position, the pivotal plate is not rotatable in either of the first and second directions from the first position to the second position, locking the post between the top and bottom mounting blocks, and wherein when the pivotal plate is in the first position and the locking portion of the retaining member is in the unlocking position, the pivotal plate is rotatable in the first direction from the first position to the second position, allowing removal of the post from the top and bottom mounting blocks.