| 摘要 |
<p>ELASTOMERIC EXPANSION SEAL An expansion joint strip seal for use in roadways, bridges, buildings, and the like adapted for use with a pair of elongated, parallel, spaced apart edge members defining a gap therebetween and each of the edge members having a generally C-shaped cavity opening toward said gap. The seal includes mounting beads on each of its longitudinal edges for mounting within the aforesaid edge member cavities and a downwardly folding resilient web member spanning the aforesaid gap and being attached to the mounting beads. Each mounting bead is of tubular construction and includes an outer wall surface. configuration adapted for engagement in said cavity. A wall in an unstressed, disassembled condition includes a radius of curvature which is less than the radius of curvature of the cavity so that upon assembly of the mounting head within the cavity the curved outer wall mid-portion is forced to assume the curvature of the cavity resulting in a highly effective mounting of the bead. To facilitate such deformation and assembly of the mounting bead, each of the edges of the outer wall adjacent to the curved mid-portion are provided with reliefs. In addition, the wall portion of each mounting bead adjacent to the aforesaid gap is of a S-shaped configuration, the latter acting as a spring to resiliently retain the bead in a firmly mounted disposition during the various degrees of expansion and contraction of the gap defined between the edge members.</p> |
