Patent ID: 8082695

Claim:
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 spaced from the top beam in a vertical direction perpendicular to the horizontal direction, with the bottom mounting block aligned with the top mounting block in the vertical 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 first pivotal plate pivotably mounted to the mounting bracket and including upper and lower ends spaced in the vertical direction, with the first pivotal plate further including a first coupling slot in the upper end of the first pivotal plate, with the positioning rod removably received in the first coupling slot of the first pivotal plate, with the upper end of the first pivotal plate being rotatable relative to the mounting bracket between a first position and a second position; a retaining member moveably mounted to the mounting bracket and 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 first pivotal plate and an unlocking position disengaged from the first pivotal plate; 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 retaining member between the locking position and the unlocking position, wherein when the upper end of the first pivotal plate is in the first position and the locking portion of the retaining member is in the locking position, the first pivotal plate can not be rotated relative to the mounting bracket from the first position to the second position, locking the post between the top and bottom mounting blocks, and wherein when the upper end of the first pivotal plate is in the first position and the locking portion of the retaining member is in the unlocking position, the first pivotal plate can be rotated relative to the mounting bracket from the first position to the second position, allowing removal of the post from the top and bottom mounting blocks.