Movable or removable closures – Optionally moved – manually – or by motor
Patent
1979-12-31
1982-09-14
Kannan, Philip C.
Movable or removable closures
Optionally moved, manually, or by motor
49 29, 49140, 49340, 49345, E05F 1500
Patent
active
043488358
ABSTRACT:
An auxiliary door opening device comprises an extendible motor driven rotatable output shaft that engages and rotates a pivot shaft of a conventional door closing mechanism. The pivot shaft is drivingly connected to a pair of pivotally connected arms of the door closing mechanism, such that rotation of the pivot shaft causes the arms of the door closing device to pivot, urging the door open. The door opening device is activated by a remote switching device so that a handicapped person may open the door with a minimum of effort. A limit switch causes the motor to shut off and the output shaft to retract out of engagement with the pivot shaft when the door is fully opened. A solenoid apparatus holds the door open long enough to allow a handicapped person to pass through the door before allowing the door closing mechanism to urge the door closed. When not actuated by the switching device, the door opens manually and the door closing mechanism controls door closing in its normal manner, unaffected by the door opening device.
REFERENCES:
patent: 1684704 (1928-09-01), Hubbell
patent: 2298542 (1942-10-01), Potter et al.
patent: 2591693 (1952-04-01), Gatesy
patent: 3069151 (1962-12-01), Cook et al.
patent: 3081994 (1963-03-01), Martens
patent: 3344554 (1967-10-01), Misaka et al.
patent: 3384994 (1968-05-01), Daugirdas et al.
patent: 3457674 (1969-07-01), Catlett et al.
patent: 3470653 (1969-10-01), Kalog
patent: 3508362 (1970-04-01), Wright
patent: 3708915 (1973-01-01), Davey
patent: 3874117 (1975-04-01), Boehm
patent: 4007557 (1977-02-01), Davis et al.
patent: 4121382 (1978-10-01), Dietrich et al.
Jones Stanley
Nyenbrink Willard
LandOfFree
Automatic door opening device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic door opening device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic door opening device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2149995