Systems and methods for operating a barrier

Details Systems and methods for operating a barrier Systems and methods for operating a barrier

2007-01-30

2007-01-30

Masih, Karen (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

C318S636000, C318S467000, C318S727000, C318S700000, C318S266000, C318S283000

Reexamination Certificate

active

10927702

ABSTRACT:
Disclosed are systems and methods for operating a barrier. In one embodiment, a door operator can be opened or closed by triggering either an internal device (e.g., wall button) or an external device. In one embodiment, if an obstacle is detected when the door is opening or closing, the door will either stop or swing in the reverse direction. In yet a further embodiment, the door operator is implemented using an alternating current (AC) synchronous motor.

REFERENCES:
patent: 4319169 (1982-03-01), Kucharczyk
patent: 5198974 (1993-03-01), Orsat
patent: 5540269 (1996-07-01), Plumer
patent: 5852897 (1998-12-01), Sukale
patent: 5910075 (1999-06-01), Arnell et al.

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