Patent ID: 9494235
Filing Date: 2016-11-15
CPC Classification: B29D,E04B,F16J

Claim Text:
1. An elastic seal useable in an expansion joint of a building, the seal comprising: a pair of substantially straight parallel side wall portions, wherein each side wall portion has an outside surface having a length extending at least 24 inches, with the outside surfaces of the side wall portions being separated by a first distance; a top wall extending between the side wall portions, the top wall having a cross-sectional shape with a first flat portion, a second flat portion, at least 2 rounded crests and at least 3 troughs, wherein the troughs each extend from respective crests to a respective bottom, and the first flat portion extends directly from one side wall portion to one trough, the second flat portion extends directly from the other side wall portion to another trough, and the flat portions are perpendicular to the respective side wall portions when the seal is not deflected; a bottom wall extending between the side wall portions and displaced a second distance from the top wall such that the parallel side wall portions of the seal form the sides of a rectangular boundary within which at least one of the top or bottom walls reside, the bottom wall having a cross-sectional shape with at least 2 crests and at least 3 troughs, wherein the troughs each extend from respective crests to a respective bottom; a first set of at least 2 webs located within the rectangular boundary, each web of the first set having a length parallel with the length of the outside surfaces of the side wall portions and each web of the first set extending from the side wall portions to the bottom of the troughs in the respective top or bottom walls, wherein an angle between the webs of the first set and the respective side wall portions is at least 30 degrees when the side wall portions are separated by the first distance, and the angle is reduced to less than 25 degrees, when the seal is compressed so that the first distance is reduced by 35%; and a second set of at least 2 webs located within the rectangular boundary, each web of the second set having a length parallel with the length of the outside surfaces of the side wall portions and each web of the second set extending from one of the troughs in the top wall to one of the troughs in the bottom wall with no other webs extending in-between, wherein an angle between the webs of the second set is at least 50 degrees when the side wall portions are separated by the first distance, and the angle is reduced to less than 30 degrees, when the seal is compressed so that the first distance is reduced by 35%.