Revolving door braking and locking device

Details Revolving door braking and locking device Revolving door braking and locking device

1998-09-10

2000-05-09

Redman, Jerry

Movable or removable closures

Plural wings radiate from common pivot; i.e., revolving

With speed regulator

49138, E05D 1502

Patent

active

060586524

ABSTRACT:
A manually operable carousel revolving door having a locking element with a rotary axle disposed inside. The door comprises a braking motor, a rotational speed detector and a rotation direction detector, all actively connected to the locking element. If the door rotates at a speed above a predetermined rate or in a wrong direction, the rotation speed detector and the rotation direction detector signals the braking motor to act on the rotary axle of the locking element to slow the rotation rate of the door. The braking motor can be disposed in a receptacle in the top side covering in the revolving door. In addition, the braking motor can be connected to the rotary axle via a chain drive or a toothed gear drive.

REFERENCES:
patent: 1014997 (1912-01-01), Blickensderfer
patent: 2186385 (1940-01-01), Lockart
patent: 2267632 (1941-12-01), Wunsch
patent: 3497997 (1970-03-01), Sheckells
patent: 3678623 (1972-07-01), Jenkins
patent: 4154023 (1979-05-01), Carroll
patent: 4475308 (1984-10-01), Heise et al.
patent: 4976065 (1990-12-01), Beran et al.
patent: 5647173 (1997-07-01), Stark et al.

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