Fire-resistant concealed door hinge
AssigneeSimonswerk GmbH
InventorsNicolas Liermann, Joerg Ellefred
Life of this patent
Estimating the term…
Abstract
A hinge has first and second leaf assemblies pivoted on each other and a link assembly interconnecting the first and second leaf assemblies. At least one of the first and second leaf assemblies has upper and lower mounts forming a cavity in which a respective end of the link assembly is pivoted, and at least one of the mounts of the one leaf assembly is formed with a recess opening into the cavity. According to the invention a body of foaming fire-protection material is provided in the recess so that when heated the body expands and fills the cavity with fire-protective foam.
Claims18
A hinge comprising:
- first and second leaf assemblies pivoted on each other;
- a link assembly interconnecting the first and second leaf assemblies, one of the first and second leaf assemblies having upper and lower mounts forming a cavity in which a respective end of the link assembly is pivoted, at least one of the mounts of the one leaf assembly being formed with a recess opening into the cavity;
- and
- a body of foaming fire-protection material in the recess and that expands and fills the cavity with fire-protective foam when heated.
A hinge for a door set in a jamb and pivotal therein between open and closed positions, the hinge comprising:
- first and second housings mountable respectively in the jamb and an edge of the door and each forming a cavity, the cavities being closely juxtaposed and confronting each other in the closed position of the door, at least one of the cavities being formed with a recess opening into the respective cavity;
- upper and lower first and second mounts in each of the cavities;
- a link assembly having first and second ends pivoted in the upper and lower first and second mounts and constructed to support the door when moving between the open and closed positions, the link assembly being contained in the cavities in the closed position of the door;
- and
- a body of foaming fire-protection material in the recess constituted of a material that expands and fills the cavities with fire-protective foam when heated.
Dependencies are inferred from the claim text.