Revolving Door Locking Mechanism

The basic design of this type of door includes from two to four vertical leaves attached overhead with a central shaft.

Revolving door locking mechanism.

Using revolving doors people can enter and exit high traffic buildings with ease without needing to pull a lever or twist a knob. Infiltration through a revolving door except for a small amount passing though the door seals is virtually not affected by building height indoor outdoor pressure difference and fan operation. A revolving door including a plurality of door leaves extending radially outwardly from a center shaft in angularly spaced. Either can fail under high heat conditions and trap firefighters.

Revolving doors consist of three or four leaves or wings centered on a central pivoting shaft that has a vertical axis. These are enclosed in a round enclosure with openings on the inside and outside to allow passage as the door rotates within the enclosure. Revolving doors have four panels that may collapse upon themselves to open an egress point older doors may not. The door leaves then pivot around a vertical axis within a partial cylindrical drum.

A revolving door mitigates stack effect by allowing traffic while sealing air flow. Revolving doors may be manually or automatically operated. Overhead doors are counter balanced with springs or weights. International revolving door offers replacement parts for all of our revolving doors in service today.

Us4970825a collapsing mechanism for revolving doors google patents. Note the construction of the door and the locking mechanism.