Patent ID: 11952836
Assignee: CHUNG TAI ROLLER SHUTTERS COMPANY LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E  A | IPC E

Claim 0:
1. A roller shutter including:
a chamber with an opening,
a roller curtain movable between a retracted configuration in which said roller curtain is substantially fully contained within said chamber and an extended configuration in which at least part of said roller curtain extends beyond said chamber through said opening, and
at least one guide rail along and relative to which said roller curtain is movable between said retracted configuration and said extended configuration,
wherein said roller curtain includes
a plurality of slat members interlocked with each other for relative pivotal movement, said plurality of slat members collectively forming a first major surface and a second major surface, and
a first layer of fire-resistant and/or heat-resistant fabric fixedly mounted to said first major surface of said plurality of slat members and a second layer of fire-resistant and/or heat-resistant fabric fixedly mounted to said second major surface of said plurality of slat members, and
wherein said guide rail includes at least a first sealing member which, when said roller curtain is in said extended configuration, contacts or presses into said first layer of fire-resistant and/or heat-resistant fabric to form a first seal which at least hinders the passage of smoke there-through,
wherein said roller curtain includes an elongate member,
wherein said guide rail includes a trough,
wherein said elongate member moves along and relative to said trough when said roller curtain moves between said retracted configuration and said extended configuration,
wherein said trough has an opening adapted to prevent detachment of said elongate member from said trough in a direction substantially perpendicular to a length of said elongate member and substantially perpendicular to a normal to said first major surface, and
wherein, upon bending of said roller curtain, said elongate member is adapted to contact at least two wall surfaces of said trough to form at least two second seals which at least hinder the passage of smoke there-through.