Motor assembly for chain-drive garage door operator

Details Motor assembly for chain-drive garage door operator Motor assembly for chain-drive garage door operator

1992-01-13

1993-06-22

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, 49199, H02K 706, E05F 1100

Patent

active

052218694

ABSTRACT:
A door operator for a reversibly operable door, such as a garage door, includes a frame and a carriage movably mounted on the frame and attached to a door for moving the door between open and closed positions. A flexible drive member, such as an endless chain, extends on the frame and is capable of moving the carriage. A drive train is on the frame connected for moving the flexible drive member. A motor housing is mounted on the frame within the motor housing and connected to the drive train. The motor has a shaft extending from the motor housing and engaging the drive train. A bearing assembly that includes metal thrust bearings is on the shaft adjacent to the motor. The metal thrust bearing assembly increases the performance of the electric motor, and thus provides a more powerful motor without changing to a larger motor or otherwise modifying the motor design. The motor is mounted on the frame so as to allow the shaft freely to move axially relative to the motor to permit the shaft to self-align. The rotor thus seeks its position of least resistance and maintains this position without manual adjustment, providing an improvement in motor performance.

REFERENCES:
patent: 3816782 (1974-06-01), Dow et al.
patent: 4055023 (1977-10-01), Gatland et al.
patent: 5036899 (1991-08-01), Mullet
patent: 5040332 (1991-08-01), Aquilina

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