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US 12,297,696 B2Granted
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 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, wherein the adjustable speed operator governor release comprises:
- an adjustable nut;
- a spring located adjacent to the adjustable nut;
- a first friction pad located adjacent to the spring;
- a rotatable pin plate having a protruding pin coupled to a surface of the rotatable pin plate located adjacent to the first friction pad;
- a second friction pad located adjacent to the rotatable pin plate;
- a threaded friction sleeve coupled to the first friction pad, the rotatable pin plate, and the second friction pad, wherein the adjustable nut, the spring, the first friction pad, the rotatable pin plate, the second friction pad, and the threaded friction sleeve are located in-line on the center shaft;
- and
- a stopper sleeve to partially enclose the adjustable nut, the spring, the first friction pad, the rotatable pin plate, the second friction pad, and the threaded friction sleeve, wherein the stopper sleeve comprises a cut-out and the stopper sleeve is rotatable around the center shaft to position the cut-out at a desired location relative to the protruding pin of the rotatable pin plate;
- and
- a spring-loaded clutch assembly 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.
9 more elements
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, wherein the adjustable speed operator governor release comprises:
- an adjustable nut;
- a spring located adjacent to the adjustable nut;
- a first friction pad located adjacent to the spring;
- a rotatable pin plate having a protruding pin coupled to a surface of the rotatable pin plate located adjacent to the first friction pad;
- a second friction pad located adjacent to the rotatable pin plate;
- a threaded friction sleeve coupled to the first friction pad, the rotatable pin plate, and the second friction pad, wherein the adjustable nut, the spring, the first friction pad, the rotatable pin plate, the second friction pad, and the threaded friction sleeve are located in-line on the center shaft;
- and
- a stopper sleeve to partially enclose the adjustable nut, the spring, the first friction pad, the rotatable pin plate, the second friction pad, and the threaded friction sleeve, wherein the stopper sleeve comprises a cut-out and the stopper sleeve is rotatable around the center shaft to position the cut-out at a desired location relative to the protruding pin of the rotatable pin plate;
- a spring-loaded clutch assembly that is located between the drive assembly and the adjustable speed operator governor release;
- and
- a sash chain coupled to the spring-loaded clutch assembly, wherein during a fire, the sash chain is released to move the spring-loaded clutch assembly from the drive assembly to the adjustable speed operator governor release to control a speed that the fire shutter is closed.
12 more elements
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, wherein the adjustable speed operator governor release is set by rotating a portion of the adjustable speed operator governor release around the center shaft to a position that determines when braking is applied to control a closing speed of the fire shutter;
- and
- a spring-loaded clutch assembly 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, wherein the spring-loaded clutch assembly comprises:
- a clutch located on the center shaft in-line and between the drive assembly and the adjustable speed operator governor release;
- a lever located against the clutch, wherein the lever comprises a first member coupled to a second member;
- an actuator spring coupled to an end of the first member of the lever;
- and
- a clutch spring coupled to the clutch on an opposite side from the lever, wherein the actuator spring controls movement of the lever to cause the lever to control a lateral movement of the clutch along the center shaft.
6 more elements
Dependencies are inferred from the claim text.