Abstract: A metal casing strip for a fire collar to be arranged around a duct has a line of succesive tongues and cutouts in the longitudinal direction of the strip. The tongues and cutouts are arranged in the strip in an alternating fashion. The tongues are bendable out of the surface of the casing strip such that in use, when the casing strip is arranged around a pipe such that two end regions overlap, an outwardly bended tongue from the one end region is inserted in a cutout of the overlapping other end region and folded over the edge of the cutout to retain the casing strip in the closed collar shape.
Type:
Grant
Filed:
November 13, 2012
Date of Patent:
March 18, 2014
Assignees:
J. van Walraven Holding B.V., Rolf Kuhn GmbH
Abstract: A metal casing strip for a fire collar to be arranged around a duct has a line of succesive tongues and cutouts in the longitudinal direction of the strip. The tongues and cutouts are arranged in the strip in an alternating fashion. The tongues are bendable out of the surface of the casing strip such that in use, when the casing strip is arranged around a pipe such that two end regions overlap, an outwardly bended tongue from the one end region is inserted in a cutout of the overlapping other end region and folded over the edge of the cutout to retain the casing strip in the closed collar shape.
Type:
Application
Filed:
November 13, 2012
Publication date:
March 14, 2013
Applicants:
ROLF KUHN GMBH, J. VAN WALRAVEN HOLDING B.V.
Inventors:
J. van Walraven Holding B.V., Rolf Kuhn GmbH
Abstract: A metal casing strip for a fire collar to be arranged around a duct has a line of successive tongues and cutouts in the longitudinal direction of the strip. The tongues and cutouts are arranged in the strip in an alternating fashion. The tongues are bendable out of the surface of the casing strip such that in use, when the casing strip is arranged around a pipe such that two end regions overlap, an outwardly bended tongue from the one end region is inserted in a cutout of the overlapping other end region and folded over the edge of the cutout to retain the casing strip in the closed collar shape.
Type:
Grant
Filed:
April 2, 2010
Date of Patent:
December 25, 2012
Assignees:
J. Van Walraven Holding B.V., Rolf Kuhn GmbH