Electromagnetic clutch-controlled electric blind

Details Electromagnetic clutch-controlled electric blind Electromagnetic clutch-controlled electric blind

2006-05-09

2006-05-09

Purol, David (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

C160S17610P, C160SDIG017

Reexamination Certificate

active

07040374

ABSTRACT:
An electromagnetic clutch-controlled electric blind is constructed to include a blind body formed of a headrail defining a receiving chamber, a set of slats, and a bottom rail, a power drive, the power drive including a reversible motor and electromagnetic clutch apparatus connectable to the motor, an amplitude modulation set coupled to the motor for rotation with the motor to lift/lower the slats to the desired elevation, a frequency modulation set coupled to the motor through the electromagnetic clutch apparatus and adapted for controlling tilting angle of the slats.

REFERENCES:
patent: 3310099 (1967-03-01), Hunter et al.
patent: 3809143 (1974-05-01), Ipekgil
patent: 4096903 (1978-06-01), Ringle, III
patent: 4503900 (1985-03-01), Osaka et al.
patent: 4775039 (1988-10-01), Sunakawa
patent: 4914360 (1990-04-01), Hsieh et al.
patent: 6144177 (2000-11-01), Mao et al.
patent: 6446693 (2002-09-01), Anderson et al.
patent: 6789597 (2004-09-01), Wen et al.

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