On-demand power-opening door

• Main Authors: ERICSSON MARTIN D, PETERSON KIM C
• Format: Patent
• Language: English
• Published: 13.10.2005
• Edition: 7
• Subjects: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS; CHECKS FOR WINGS; DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; FIXED CONSTRUCTIONS; HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS; INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICESFOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTOOPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOTOTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THEWING; KEYS; LOCKS; SAFES; WINDOW OR DOOR FITTINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING

An on-demand power-operating door arrangement includes a supporting structure forming a passage, a door mounted to the supporting structure for closing the passage, and a power operator for operating the door. The power operator includes a motor, and a linkage operably connected to the motor and arranged to move the door to the passage-opening position. The door is manually swingable from a closed position to an open position independently of the linkage. The linkage and the door are returned from the door-opened position by respective springs, the spring which returns the door being weaker than the spring which returns the linkage.