Fire rated door

Patent metadata

Field	Value
Publication number	US-11512523-B2
Application number	US-201816499102-A
Country	US
Kind code	B2
Filing date	Mar 27, 2018
Priority date	Mar 27, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A closure may include a door configured to seal an opening. The door may include a section with an internal cavity. The closure may also include a core within a first portion of the internal cavity of the section. The core may be configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state.

First claim

The invention claimed is:

1. A closure comprising:
a door configured to seal an opening, the door including a section with an internal cavity;
a core within a first portion of the internal cavity of the section, the core configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state;
a guide coupled to the edge of the opening and configured to receive a first portion of the section;
an opening header configured to receive the door when the door is in a retracted position, wherein the section is adjacent the opening header when the door is in an extended position and the core is configured to seal a header space between the door and the opening header when the core is in the expanded state; and
a perimeter seal along the guide and the opening header configured as a barrier to at least one of heat, air, smoke, and fire at a temperature at which the core transitions to the expanded state,
wherein the first portion of the internal cavity of the section is positioned at or near an end of the section,
wherein the door is moveable with respect to the opening along the guide from the retracted position to the extended position and the first portion of the section is adjacent the guide when the door is in the extended position.

2. The closure of claim 1 , wherein the section comprises a slat.

3. The closure of claim 1 , further comprising a steady-state core in a second portion of the internal cavity of the section, the second portion spaced from the guide.

4. The closure of claim 3 , wherein the steady-state core is non-combustible.

5. The closure of claim 1 , wherein the perimeter seal along the guide is configured to seal a guide space when the door is in the extended position.

6. The closure of claim 5 , wherein the perimeter seal is configured to provide the barrier to the at least one of heat, air, smoke, and fire throughout an expansion of the core from the relaxed state to the expanded state.

7. The closure of claim 5 , further comprising a bottom seal on a bottom of the door configured to provide a seal between the bottom of the door and a bottom of the opening when the door is in the extended position to at least a temperature of about 400° F.

8. The closure of claim 7 , wherein the perimeter seal comprises a siliconized rubber perimeter seal.

9. The closure of claim 8 , wherein the siliconized rubber perimeter seal is configured to restrict infiltration of at least one of heat, air, smoke, and fire migration to a level of about 600° F.

10. The closure of claim 1 , wherein the section includes a perforation such that the core expands through the perforation and into the header space.

11. The closure of claim 1 , wherein the core is configured to expand in response to an increase in temperature.

12. The closure of claim 11 , wherein the door is configured to be sealed to the at least one of heat, air, smoke, and fire up to at least 400° F.

13. The closure of claim 11 , wherein the door is configured to be sealed to the at least one of heat, air, smoke, and fire up to at least 2000° F.

14. The closure of claim 1 , wherein the section includes a section thickness and the core is configured to expand to at least 500% of the section thickness.

15. The closure of claim 1 , wherein the door comprises a coiling door.

16. The closure of claim 1 , wherein the door includes a plurality of additional sections, each of the additional sections having front perforations and back perforations that are configured to permit the core to migrate through the front perforations and the back perforations when the core transitions to the expanded state.

17. The closure of claim 1 , further comprising a second section adjacent to and interlocking with the section with a second internal cavity and a second core within a first portion of the second internal cavity of the second section, the second core configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state.

18. The closure of claim 17 , wherein the second section and the first section interlock in a front to back hinged configuration.

19. The closure of claim 1 , wherein the core comprises first and second expanding portions disposed on opposite sides of a backing material, the first and second expanding portions aligned with a front portion of the section and a back portion of the section respectively.

20. The closure of claim 1 , wherein the core is configured to initiate expansion when it reaches about 360° F.

21. The closure of claim 1 , wherein the first portion of the internal cavity includes an open end.

22. The closure of claim 1 , wherein the first portion of the internal cavity is configured to have a volume equal to about 10% of the total volume of the section.

23. The closure of claim 1 , wherein the first portion of the internal cavity is configured to have a volume equal to about 20% of the total volume of the section.

24. The closure of claim 1 , wherein the first portion of the internal cavity is configured to have a volume equal to about 30% of the total volume of the section.

25. A closure comprising:
a door configured to seal an opening, the door including a section with an internal cavity and a perforation extending between the internal cavity and a first surface of the section;
a core within the internal cavity of the section, the core configured to expand from a relaxed state to an expanded state such that the core extends through the perforation and onto the first surface of the section when the core is in the expanded state;
a guide coupled to an edge of the opening;
an opening header configured to receive the door when the door is in the retracted position; and
a header space between the door and the opening header when the door is in the extended position,
wherein the door is moveable with respect to the opening along the guide from a retracted position to an extended position,
wherein the core is positioned at or near an end of the section,
wherein the core is configured to form a seal between the section and the guide when the core is in the expanded state, and
wherein the section is adjacent the opening header when the door is in the extended position and the perforation confronts the header space such that the core provides a seal between the door and the opening header when the core is in the expanded state.

Assignees

• Cornellcookson Llc

Inventors

• Dawdy David

Classifications

• E06B9/17046

  Bottom bars · CPC title

• E06B9/582

  Means to increase gliss, light, sound or thermal insulation · CPC title

• E06B2009/1588

  inserted in engaging section of adjacent slats · CPC title

• E06B2009/588

  Sealings for guides · CPC title

• E06B2009/1594

  attached to outer surface of slat · CPC title