Automatic door opener and closer

Details Automatic door opener and closer Automatic door opener and closer

1985-06-17

1987-04-21

Kannan, Philip C.

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

49 28, 49 29, 49264, E05F 1504

Patent

active

046585451

ABSTRACT:
In a door opening and closing apparatus a reversible drive motor and door actuator are mounted in the framing above a door header. The vertically disposed drive shaft of the motor is connected with the door actuator through a friction clutch equipped drive train including a series of speed reducing torque increasing cog belts and pulleys. The drive train operates pivoting linkage secured at one end to the door for biasing the door open or closed in response to the direction of rotation of the drive motor. A circuit connects a source of electrical energy with the drive motor through a plurality of current switching relays also inducing magnetic flux in the field windings of a braking slave motor driven by the driving motor. Door opening action is initiated by a foot pressure switch.

REFERENCES:
patent: 2639142 (1953-05-01), Morgan et al.
patent: 3114541 (1963-12-01), Coffey
patent: 3284950 (1966-11-01), Gute
patent: 3370381 (1968-02-01), Wetter
patent: 3425161 (1969-02-01), Catlett et al.
patent: 3864875 (1975-02-01), Hewitt
patent: 3874117 (1975-04-01), Boehm
patent: 3886425 (1975-05-01), Weiss

Affiliated with

Also associated with

Rating

Automatic door opener and closer 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 opener and closer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic door opener and closer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-743114