Fire collar

A fire collar including:

• a housing having a bore that includes a first opening and a second opening, said second opening being spaced from said first opening by at least one side wall in which there is formed a plurality of recesses and wherein adjacent recesses are connected to one another by one or more side wall portions;
• at least one mount for mounting said housing to a supporting structure, said at least one mount being located adjacent said first opening;
• a layer of intumescent material contained within said bore, adjacent said first opening, and supported in said bore adjacent said one or more side wall portions, said layer of intumescent material being spaced from said one or more side wall portions by one or more spacers such that there is provided a gap between said intumescent material and said one or more side wall portions;
• and
• a plurality of torsion springs each being connected to said housing and at least partially located within a respective one of said plurality of recesses, each of said plurality of torsion springs having a first leg and a second leg that are separated by and connected to an intermediate body portion consisting of a plurality of coils, said first and second legs extending tangentially away from said body portion, and wherein said second leg is capable of movement between a first or non-operating position proximal to said layer of intumescent material and a second or operational position whereby said layer of intumescent material that is in contact with said second leg, either directly or indirectly, at least partially obstructs said bore,
• wherein said second leg includes a connecting portion that is connected to and extends tangentially away from one end of said body portion, said connecting portion having a longitudinal axis that is substantially parallel to the longitudinal axis of said bore when said second leg is in its first or non-operating position, and a distal end portion that is connected to said body portion by said connecting portion, said distal end portion including a leg portion that is adapted to engage said intumescent material over a substantially broad area, said leg portion having a longitudinal axis that is substantially perpendicular to said longitudinal axis of said connecting portion.