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 vent of fire, by releasing gas from a supporting gas spring.
Claims18
A fire resistant door designed to prevent the spread of fire comprising:
- a frame;
- a door hingedly connected to the frame;
- a collapsible supporting member adapted to hold the door spaced from the frame in an open position;
- and
- a heat activated self closing mechanism comprising a trigger mechanism including a firing pin, a fusible link plug, and a slave pin spaced from the firing pin by the fusible link plug, wherein the fusible link plug melts when exposed to sufficient heat which enables the firing pin to actuate the slave pin, and wherein the trigger mechanism interacts with the collapsible supporting member to collapse the collapsible supporting member when sufficient heat is applied to the door.
A fire resistant door designed to prevent the spread of fire comprising:
- a frame;
- a heat activated self closing mechanism including a trigger mechanism and a collapsible supporting member;
- a door hingedly connected to the frame, the door having a bottom wall, a top wall, and side walls, the bottom wall having an outside surface and the top wall having an outside surface, wherein the door is horizontally hinged to the fame;
- and
- a layer of intumescent material on the outside surface of the bottom wall, and the outside surface of the top wall being clear of additional insulating materials.
A fire resistant door designed to prevent the spread of fire comprising:
- a frame:
- a door hingedly connected to the frame;
- a collapsible supporting member adapted to hold the door spaced from the frame in an open position;
- and
- a heat activated self closing mechanism comprising a trigger mechanism including a firing pin and a fusible link, wherein the fusible link melts when exposed to sufficient heat which actuates the firing pin, and wherein the trigger mechanism interacts with the collapsible supporting member to collapse the collapsible supporting member when sufficient heat is applied to the door.
Dependencies are inferred from the claim text.