Patent ID: 9140387
Filing Date: 2015-09-22
Classification: A62C,F16L,H02G

Abstract:
1. A firestop collar comprising: a support band made of sheet metal, the support band including a plurality of pre-defined cutting zones at a distance from each other in a lengthwise direction of the support band and running crosswise to the lengthwise direction; and an intumescent strip running along the support band and connected to the support band, the intumescent strip having several cutting areas oriented in a similar manner where the intumescent strip is thinner than in adjacent areas in the lengthwise direction, the cutting areas coinciding with the cutting zones; wherein the support band includes a plurality of hooks created by stamping and bending sheet metal sections of the support band, and wherein the stamped sheet metal sections are arranged in groups and openings formed by stamping the sheet metal sections overlap with the cutting zones.