Expansion joint seal

Claim 1

A preformed elastomeric seal for an expansion joint comprising an elongated tube which, in cross section, comprises a pair of heart-shaped members, connected to each other in sideby-side relationship, each of saId heart-shaped members having 1. an undulating upper surface including a pair of ribs (30, 32) extending upwardly and outwardly from the bottom of a shallow grove (39, 40) extending downwardly from a middle position at the top of said seal, and ribs extending downwardly and outwardly from the upper ends of said upwardly and outwardly extending ribs (43, 44, 31) to the bottoms of shallow grooves extending downwardly from the top of said seal adjacent said heart-shaped members, 2. a pair of legs (33, 34, 35, 36) extending upwardly and outwardly from the bottom of said heart-shaped member and connected at their distal ends to the ends of said downwardly and outwardly extending ribs, whereby there is a deep groove between the lower portions of said heart-shaped members, and 3. vertical ribs (37, 38) connecting between the bottom of said first-mentioned shallow grooves and the junction of said legs at the bottom of said seal, and a rib (25) connecting the bottoms of said heart-shaped members to reduce their tendency to be pressed together thereby reducing upward bulging of said seal, said bottom-connecting rib and portions of said legs forming the bottom of said tube.