Operator governor release for fire shutters
AssigneeCornellCookson, LLC
InventorsBrian Rishi Kachchakaduge Fernando, John Elias Bullen, David Dawdy
Life of this patent
Estimating the term…
Abstract
In example implementations, an adjustable speed operator governor release for a rolling fire shutter is provided. The adjustable speed operator governor release includes a shaft coupled to the rolling fire shutter, a gear on a first end of the shaft to engage a spring-loaded clutch during a fire, wherein the spring-loaded clutch is moved to disengage from a drive assembly and to engage the gear of the adjustable speed governor to operate the rolling fire shutter, and a linear speed adjusting mechanism coupled to the shaft and the gear to control a speed of free fall of the rolling fire shutter during the fire.
Claims20
An adjustable speed operator governor release for a rolling fire shutter, comprising:
- a shaft coupled to the rolling fire shutter;
- a gear on a first end of the shaft to engage a spring-loaded clutch during a fire, wherein the spring-loaded clutch is moved to disengage from a drive assembly and to engage the gear of the adjustable speed governor to operate the rolling fire shutter;
- and
- a linear speed adjusting mechanism coupled to the shaft and the gear to control a speed of free fall of the rolling fire shutter during the fire.
An apparatus, comprising:
- a drive assembly coupled to a center shaft, wherein the drive assembly is operated to rotate a barrel to open and close a fire shutter coupled to the barrel via rotation of the center shaft;
- an adjustable speed operator governor release coupled to the center shaft and located in-line with the drive assembly;
- and
- a spring-loaded clutch that is located between the drive assembly and the adjustable speed operator governor release to transfer control between the drive assembly and the adjustable speed operator governor release.
A fire shutter assembly, comprising:
- a barrel;
- a fire shutter coupled to the barrel, wherein the fire shutter is to be rolled around the barrel in an open position or rolled off of the barrel in a closed position;
- a drive assembly coupled to the barrel via a center shaft to manually operate the fire shutter;
- an adjustable speed operator governor release coupled to the center shaft and located in-line with the drive assembly;
- a spring-loaded clutch that is located between the drive assembly and the adjustable speed operator governor release;
- and
- a sash chain coupled to the spring-loaded clutch, wherein during a fire, the sash chain is released to move the spring-loaded clutch from the drive assembly to the adjustable speed operator governor release to control a speed that the fire shutter is closed.
Dependencies are inferred from the claim text.