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US 11,512,523 B2Granted
Fire rated door
AssigneeCornellCookson, LLC
InventorDavid Dawdy
Life of this patent
Estimating the term…
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.
Claims25
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.
5 more elements
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.
7 more elements
Dependencies are inferred from the claim text.