Auxiliary driving device for a rolling door

Details Auxiliary driving device for a rolling door Auxiliary driving device for a rolling door

1991-05-30

1992-08-04

Braun, Leslie A.

Machine element or mechanism

Gearing

Plural prime movers selectively coupled to common output

743375, 74665B, 192 93A, 310 80, 310112, F16H 3706, F16D 1900, H02K 720

Patent

active

051349027

ABSTRACT:
An auxiliary driving device being attached to a primary driving device of a rolling door and including a gear engaged with a gear wheel of the primary driving device, a motor having an axle, a lower disc with a pinion slidably engaged on the axle, a spring biasing the pinion and the lower disc upward, an upper disc disposed above the lower disc, three balls engaged in the recesses formed in the discs, the pinion moves downward to engage with the gear when the first motor is energized so that the spindle can be driven to rotate by the motor.

REFERENCES:
patent: 984523 (1911-02-01), Baer
patent: 2356590 (1944-08-01), Jacobson
patent: 2728429 (1955-12-01), Kershner
patent: 3142202 (1964-07-01), Muitlbeyer
patent: 3575621 (1971-04-01), Voland et al.
patent: 4160391 (1979-07-01), Monks
patent: 4319672 (1982-03-01), Barthelemy
patent: 4484871 (1984-11-01), Adman et al.
patent: 4605122 (1986-08-01), Biddle
patent: 5028828 (1991-07-01), Felkai et al.

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