US 12,480,604 B2
Fire protection element having bimetal
Andreas Ahlers, Westendorf (DE); and Sebastian Simon, Buchloe Lindenberg (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 17/296,573
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Nov. 22, 2019, PCT No. PCT/EP2019/082281
§ 371(c)(1), (2) Date Jun. 24, 2022,
PCT Pub. No. WO2020/120107, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 18211212 (EP), filed on Dec. 10, 2018.
Prior Publication US 2022/0325826 A1, Oct. 13, 2022
Int. Cl. F16L 5/04 (2006.01); E04B 1/94 (2006.01)
CPC F16L 5/04 (2013.01) [E04B 1/948 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fire protection element for sealing a combustible body, which penetrates an opening in a wall or ceiling, in the event of a fire, wherein the fire protection element has a belt-shaped carrier from an edge of which tongues protrude transversely to a longitudinal direction of said belt-shaped carrier,
wherein the tongues are connected to the belt-shaped carrier and are separated from one another by slits,
wherein at least 50% of the tongues is formed of a bimetal which can move in one direction under the effect of heat, wherein the bimetal comprises two layers of metals having different coefficients of thermal expansion,
wherein under the effect of heat the tongues by themselves move to close the opening, and
wherein a fire protection material is applied to the tongues,
wherein the fire protection material is applied only to a side of the tongues which has the layer of metal having a lower coefficient of thermal expansion and is an inside surface.