Fire-resistant door
AssigneeNystrom, Inc.
InventorsJalil Tlemcani, Michael J. Carroll, Patrick K. Johnson
Life of this patent
Estimating the term…
Abstract
A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame; a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the event of fire, by releasing gas from a supporting gas spring.
Claims27
A fire resistant door designed to prevent the spread of fire and heat passing therethrough, the door comprising:
- a door frame;
- a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core, the bottom wall having an outside surface, and the top wall having an outside surface;
- and
- a heat activated self closing mechanism comprising a trigger mechanism, wherein the trigger mechanism is mounted within the hollow core.
A fire resistant door designed to prevent the spread of fire and heat passing therethrougth, the door comprising:
- a door frame;
- a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core, the bottom wall having an outside surface, and the top wall having an outside surface;
- and
- a heat-activated self closing mechanism comprising a trigger mechanism that interacts with a collapsible supporting member to collapse the collapsible supporting member in the event of a fire, the collapsible supporting member further comprises a gas spring having a pressurized cylinder core and a pressure release valve, wherein the trigger mechanism further comprises a compression spring, a firing pin, a fusible link plug, a slave pin spaced from the firing pin by the fusible link plug, and a threaded hollow stud adapted to be connected to the pressure release valve, the compression spring biasing the firing pin toward the slave pin, wherein the fusible link plug further comprises a melting core, and wherein melting of the melting core allows the compression spring to drive the firing pin against the slave pin, the slave pin moving within the threaded hollow stud to engage the pressure release valve.
A heat-activated self-closing mechanism for a horizontal door, the door being held in the open position against gravity, comprising a collapsible supporting member and a trigger mechanism interacting with the collapsible supporting member to the collapsible supporting member in the event of a fire, the collapsible supporting member further comprises a gas spring having a pressurized cylinder core and pressure-release valve, wherein the trigger mechanism further comprises a compression spring, a firing pin, a fusible link plug, a slave pin spaced from the firing pin by the fusible link plug, and a threaded hollow stud adapted to be connected to the pressure release valve, the compression spring biasing the firing pin toward the slave pin, wherein the fusible link plug further comprises a melting core, and wherein melting of the melting core allows the compression spring to drive the firing pin against the slave pin, the slave pin moving within the threaded hollow stud to engage the pressure release valve.
A fire resistant door adapted to fit onto a frame, the door comprising:
- a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core, the bottom wall having an outside surface, and the top wall having an outside surface;
- and
- a heat activated self closing mechanism comprising a trigger mechanism, wherein the trigger mechanism is mounted within the hollow core.
Dependencies are inferred from the claim text.