Safety device to prevent accidental unwinding of a rolling shutt

Details Safety device to prevent accidental unwinding of a rolling shutt Safety device to prevent accidental unwinding of a rolling shutt

1987-12-02

1989-07-18

Halvosa, George E. A.

Brakes

Wheel

Axially movable brake element or housing therefor

160296, 160298, 182234, 188 83, 188118, 188185, 192103B, 192105BB, 242 7547, 2421073, 2421562, F16D 6702

Patent

active

048485225

ABSTRACT:
A safety device for preventing accidental unrolling of a rolling shutter or overhead door comprising a cogwheel which has uniformly distributed on the circumference opening outward for containing radially movable tumblers, a cage which surrounds the cogwheel that contains an abutment in the form of a recess for the tumblers which are raised by the action of centrifugal force. Upon reaching a predetermined rotational speed, the tumblers engage an abutment in the cage and the cage acting as a brake is then driven by the cogwheel and slowed down by friction.

REFERENCES:
patent: Re26542 (1969-03-01), Popper
patent: 650325 (1900-05-01), Hugh
patent: 2175382 (1939-10-01), Eason
patent: 2375909 (1945-05-01), Fawick
patent: 3966024 (1976-06-01), Baer
patent: 4216848 (1980-08-01), Shimodaira

Affiliated with

Also associated with

Rating

Safety device to prevent accidental unwinding of a rolling shutt does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety device to prevent accidental unwinding of a rolling shutt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety device to prevent accidental unwinding of a rolling shutt will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-164740