Patent ID: 6266922
Filing Date: 2001-07-31
Classification: E05D,E05F,E05Y,E06B

Abstract:
A revolving door system, which revolving door system is configured to be installed in a portion of a building having a building floor surface and a building ceiling surface, said revolving door system comprising:a plurality of door panels being configured to be rotatably mounted about an axis of rotation;a drive arrangement for driving a revolving door arrangement, said drive arrangement comprising a motor for supplying a rotary torque;a control system for controlling the rotary torque supplied by said motor;a ceiling surface structure being configured to be disposed generally along a ceiling of a building;said ceiling surface structure comprising at least two arcuate segments being configured to be detachably connected and being configured to form a circular structure when connected;said circular structure comprising an outer perimeter and an inner perimeter within said outer perimeter;each of said at least two arcuate segments comprising a face band configured to be generally disposed along the outer perimeter of said circular structure;said at least two arcuate segments comprising a first arcuate segment and a second arcuate segment;said first arcuate segment having a first radius of curvature and said second arcuate segment having a second radius of curvature, said first radius of curvature being substantially equal to said second radius of curvature;each of said first arcuate segment and said second arcuate segment comprising a first butt edge and a second butt edge;said circular structure comprising a detachable connection between said first butt edge of said first arcuate segment and said first butt edge of said second arcuate segment and a detachable connection between said second butt edge of said first arcuate segment and said second butt edge of said second arcuate segment;a beam configured to hold at least one of said drive arrangement and said control system;said beam having a first end and a second end;at least one of said at least two arcuate segments being configured to abut at least another of said at least two arcuate segments to form a first abutment;at least one of said at least two arcuate segments being configured to abut at least another of said at least two arcuate segments to form a second abutment substantially diametrically opposite from said first abutment;said first end of said beam being configured to be disposed adjacent to said first abutment;said second end of said beam being configured to be disposed adjacent to said second abutment; andthe length of said beam being substantially equal to the inside diameter of said inner perimeter of said circular structure.