# US 11,028,577 B2 · Auxetic expansion joint seal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,577 B2 - Document ID: US11028577B2 - Status: Granted - Kind: B2 - Application number: 16/419,893 - Filed: 2019-05-22 - Published: 2019-09-05 - Granted: 2021-06-08 - Earliest claimed: 2016-07-22 - Assignees: Schul International Company, LLC - Applicants: Schul International Co., LLC - Inventors: Steven R. Robinson - Web page: https://patentgrep.com/patent/US11028577B2 ## CPC - E04B 1/6801: {Fillings therefor} - E04B 1/68: of joints, e.g. expansion joints (packing for joints in roads or airfields E01C11/02; expansion joints for bridges E01D19/06; sealing joints between foundation piles E02D5/14; joints in foundation structures E02D29/16; devices for sealing the spaces or joints between roof-covering elements E04D1/36; sealing joints between roof-covering elements E04D3/38; {construction of joints for flooring or floor layers composed of a number of similar elements E04F15/02005}; construction of joints for flooring or floor layers made of masses in situ E04F15/14) - E04B 1/6807: {Expansion elements for parts cast in situ} - E04B 1/6812: {Compressable seals of solid form} - E04B 1/948: {Fire-proof sealings or joints (for doors or windows E06B5/164)} - F16J 15/024: {the packing being locally weakened in order to increase elasticity} - F16J 15/064: {the packing combining the sealing function with other functions} - F16J 15/065: {fire resistant} - E04B 2001/6818: {Joints with swellable parts} - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS ## Abstract The present disclosure relates generally to systems for providing a durable water-resistant and fire-resistant foam-based seal in the joint between adjacent panels. A fire-resistant and water-resistant expansion joint seal is provided which includes one or more foam members and a plurality of intumescent members interspersed within the foam member or members to provide a spring recovery force and fire resistance. ## Claims ### Claim 1 A fire-resistant, water-resistant and vapor permeable expansion joint seal, comprising: a plurality of foam members, at least one of the plurality of foam members being auxetic, and an intumescent member, the intumescent member having a lateral cross section presenting a wave-like profile, the intumescent member having an intumescent member spring force, the intumescent member interspersed between two of the plurality of foam members. ### Claim 2 (depends on 1) The joint seal of claim 1, wherein each of the plurality of foam members is selected from one of the group of a rectangular prism and a shape complementary to the wave-like profile. ### Claim 3 The joint seal claim of 1, wherein a density of at least one of the plurality of foam members is about 16-45 kg/m3. ### Claim 4 (depends on 1) The joint seal of claim 1, wherein the spring force is in a direction parallel to a vertical axis of the joint seal. ### Claim 5 (depends on 1) The joint seal of claim 1, wherein the spring force is in a direction not parallel to a vertical axis of the joint seal. ### Claim 6 (depends on 1) The joint seal of claim 1, wherein at least of the plurality of foam members is a combustion modified, high resilience foam. ### Claim 7 (depends on 1) The joint seal of claim 1, further comprising: a second intumescent member between a further two of the plurality of foam members presenting a wave-like profile similar to the wave-like profile of the intumescent member. ### Claim 8 (depends on 1) The joint seal of claim 1, wherein the wave-like profile of the intumescent member is selected from the group of a triangular wave, a sine wave, a square wave, a sawtooth wave and an irregular wave. ### Claim 9 (depends on 1) The joint seal of claim 1, wherein a foam width of the plurality of foam members is smaller at a center of the joint seal than at an end of the joint seal. ### Claim 10 (depends on 1) The joint seal of claim 1, further comprising: a top coating applied to a top of the plurality of foam members selected from at least one of the group of an elastomer coating, an intumescent coating, an insulating coating, a hydrophobic coating, a hydrophilic coating, and an antimicrobial coating. ### Claim 11 (depends on 1) The joint seal of claim 1, further comprising: a coating, the coating applied between each of the plurality of foam members and the intumescent member. ### Claim 12 (depends on 1) The joint seal of claim 1, wherein each of the plurality of foam members includes at least one additive from the group of additives consisting of a fire-retardant additive and a water resistance additive. ### Claim 13 (depends on 1) The joint seal of claim 1, further comprising a fire-resistant layer intermediate two of the plurality of foam members. ### Claim 14 (depends on 13) The joint seal of claim 13, further comprising an external intumescent member adjacent a portion of one of the plurality of foam members on a first side near a top of the plurality of foam members. ### Claim 15 (depends on 1) The joint seal of claim 1, wherein one of the plurality of foam members is hydrophilic. ### Claim 16 (depends on 1) The joint seal of claim 1, wherein the intumescent member is hydrophilic. ### Claim 17 (depends on 1) The joint seal of claim 1, wherein each of the plurality of foam members has a foam first side and wherein at least one of the plurality of foam members is infused throughout about ten percent of a distance of a foam width from the foam first side. ### Claim 18 (depends on 1) The joint seal of claim 1, further comprising a vapor-permeable membrane positioned intermediate one of the plurality of foam members and the intumescent member. ### Claim 19 (depends on 1) The joint seal of claim 1, wherein each of the plurality of foam members has a bottom surface and further comprising a vapor permeable membrane adhered to the bottom surface of at least one of the plurality of foam members. ### Claim 20 A fire-resistant, water-resistant and vapor permeable expansion joint seal, comprising: a foam member, the foam member having a foam member first side and a foam member second side, the foam member having a longitudinal opening within the foam member from near one of the group of surfaces consisting of a foam member top surface and a foam member bottom surface, the longitudinal opening less than a foam member height, the foam member being auxetic, and an intumescent member, the intumescent member having a lateral cross section presenting a wave-like profile, the intumescent member having an intumescent member spring force, and the intumescent member positioned in the foam member in the longitudinal opening.