Back to results
US 9,803,845 B2Granted
Downlight firestop
AssigneeUrsatech Ltd.
InventorsXiaoxiong Luo, John B. Page
Life of this patent
Estimating the term…
Abstract
A firestop element is provided which is fabricated from a polymer intumescent composition. The element is associated with a light can of a downlight. In some embodiments, the firestop element drops to a deployed position in the light can in the event of a fire.
Claims27
A downlight fixture comprising:
- a light can;
- a firestop element associated with said light can, said firestop element being a frusto-conical sleeve surrounding a side wall of said light can fabricated of a polymer intumescent composition, said sleeve having a plurality of radial through slots defining a plurality of ribs;
- and
- a light mount disposed within said light can,
- wherein said sleeve is spaced from said side wall of said light can and is tapered such that an upper end of said sleeve is in closer proximity to said side wall of said light can than a lower end of said sleeve, said sleeve being sufficiently proximate said side wall so as to collapse against, and be supported by, said side wall when softening in presence of fire.
2 more elements
A downlight fixture comprising:
- a light can;
- a firestop element associated with said light can, said firestop element fabricated of a polymer intumescent composition, said firestop element having a plurality of lands with voids extending between lands;
- a light mount disposed within said light can,
- wherein said firestop element is a disk supported within said light can, said disk having a plurality of axial through slots defining said lands on a face of said disk;
- and
- wherein said voids are disk voids and wherein said disk is supported on a plate, said plate having plate voids aligned with said disk voids.
3 more elements
A downlight fixture comprising:
- a light can;
- a firestop element associated with said light can, said firestop element fabricated of a polymer intumescent composition, said firestop element having a plurality of lands with voids extending between lands;
- and
- a light mount disposed within said light can
- wherein said light can has at least one meltable or flammable support and wherein said firestop element is supported by said at least one meltable or flammable support of said light can, said at least one meltable or flammable support melting or burning off in a fire such that said firestop element is freed to drop to a deployed position within said light can.
2 more elements
A downlight fixture comprising:
- a light can;
- a firestop element supported on or within said light can by at least one heat or fire sensitive support, said firestop element fabricated of a polymer intumescent composition;
- said at least one heat or fire sensitive support, in response to a fire, ceasing to support said firestop element such that said firestop element is freed to drop to a deployed position;
- and
- said light can further having a limiter to limit a drop of said firestop element.
2 more elements
Dependencies are inferred from the claim text.