Reversing door operator

Claim 2

A door operator for a reversibly operable door, comprising in combination, a base, a reaction member mounted to said base for limited movement, torque urging means acting between said base and said reaction member to establish a neutral position of the reaction member relAtive to said base, a motor having a rotor and a stator, means mounting said motor relative to said base, means connecting said rotor to open or close the door and to move said reaction member away from said neutral position upon the torque requirements on said motor exceeding the force of said torque urging means, control means establishing at least three conditions of the door including door opening and closing and door stopped with motor de-energized conditions, switch means connected to said control means, first means actuating said switch means upon movement of said reaction member in a first direction from neutral to change said control means to the motor de-energized condition, and second means actuating said switch means in accordance with movement of said reaction member upon torque urging means return movement thereof to the neutral position to establish the door opening condition.

Claim 3

A door operator as set forth in claim 1, wherein said motor is a reversible motor to establish the reversible drive of the door.

Claim 4

A door operator as set forth in claim 2, wherein said torque urging means has first and second spring means acting oppositely between said base and reaction member with the neutral position being an intermediate position of the reaction member for movement in opposite directions.

Claim 5

A door operator as set forth in claim 1, wherein said switch means includes first and second separate switches, the first switch being actuated by movement in a first path and said second switch being actuated by movement in a separate second path.

Claim 6

A door operator as set forth in claim 4, wherein said second switch is a one-way actuated switch.

Claim 7

A door operator as set forth in claim 1, wherein said control means is a relay having contacts establishing four conditions including a door opened condition with the motor de-energized, and said switch means being connected to control said relay.

Claim 8

A door operator as set forth in claim 1, wherein said first and second actuating means includes a first cam and follower and a second cam and follower, said first cam follower cooperable with said first cam and movable in a first path upon movement of said reaction member in a first direction from neutral to actuate said switch means to change said control means to the motor de-energized condition, said second cam and cam follower relatively movable in accordance with movement of said reaction member in a second path different from said first path to actuate said switch means upon torque urging means return movement of said reaction member.

Claim 9

A door operator as set forth in claim 1, wherein said first and second actuating means includes a first cam and follower and a second cam and follower, said first cam follower cooperable with said first cam and movable in a first path substantially perpendicular to said reaction member movement upon movement of said reaction member in a first direction from neutral to actuate said switch means to change said control means to the motor de-energized condition, said second cam and cam follower relatively movable in accordance with movement of said reaction member in a second path perpendicular to said first path, and means mounting said switch means to be actuated in accordance with movement of said second cam follower in said second path upon torque urging means return movement of said reaction member.

Claim 10

A door operator as set forth in claim 8, wherein said second path is perpendicular to said direction of movement of said reaction member.

Claim 11

A door operator as set forth in claim 1, wherein said first and second actuating means includes a first cam and follower and a second cam and follower and said switch means includes first and second switches, said first cam follower cooperable with said first cam and movable in a first path substantially perpendicular to said reaction member movement upon movement of said reaction member in a first direction from neuTral, said first cam and follower actuating closed said first switch upon movement of said reaction member in said first direction to change said control means to the motor de-energized condition, said second cam and cam follower relatively movable in accordance with movement of said reaction member, said second cam having a component to move said second cam follower in a second path perpendicular to said first path, and means mounting said second switch to be out of said first path and to be actuated in accordance with movement of said second cam follower in said second path upon torque urging means return movement of said reaction member.

Claim 12

A door operator as set forth in claim 1, wherein said first and second actuating means includes first and second insulators, said first insulator being connected to move in first and second opposite directions with said reaction member, said second insulator being pivoted to said first insulator, a first cam being on said second insulator and having a component perpendicular to the movement of said first insulator, a first cam follower movable substantially perpendicular to said base upon movement of said first insulator in said first direction, a spring acting to urge said first cam follower against said first cam, an edge on said first cam over which said first cam follower is urged by said cam follower spring upon a first distance of movement of said first insulator in said first direction, first and second switches in said switch means, means actuating closed said first switch upon at least said first distance of movement of said first insulator in said first direction to change said motor to the de-energized condition, a second cam on said first cam follower, and a second cam follower on said second insulator to pivot said insulator and close said second switch upon return movement of said first insulator in said second direction when said motor is de-energized to change to said door opening condition.

Claim 13

A door operator as set forth in claim 1, wherein said first and second actuating means includes first, second and third insulators, said first insulator being connected to move in first and second opposite directions with said reaction member, said second insulator being pivoted on said base, said third insulator being pivoted to said first insulator, a first cam being on said third insulator and having a component perpendicular to the movement of said first insulator, a first cam follower on said second insulator and movable substantially perpendicular to said base upon movement of said first insulator in said first direction, a spring acting to urge said first cam follower against said first cam, an edge on said first cam over which said first cam follower is urged by said cam follower spring upon a first distance of movement of said first insulator in said first direction, first and second switches in said switch means, means actuating closed said first switch upon at least said first distance of movement of said first insulator in said first direction to change said motor to the de-energized condition, a second cam on said first cam follower, and a second cam follower on said third insulator to pivot said third insulator and close said second switch upon return movement of said first insulator in said second direction when said motor is de-energized to change to said door opening condition, whereby if an obstruction prevents the door from closing completely, the door will not merely stop but the operator will reverse and operate the door in the opening direction to stop the door at the door open condition.