| 摘要 |
<p>An expansion joint seal for use preferably in walkways and the like having a pair of elongated, parallel spaced-apart slab members defining a gap therebetween with each of the slab members having a generally C-shaped cavity opening toward said gap. The seal includes mounting beads on each of its longitudinal edges for assembly within the aforesaid slab cavities and an intermediate section 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 generally adapted for matching engagement with said cavity. The radius of curvature of each mounting bead outer wall portion in an unstressed, disassembled condition is less that the radius of curvature of the corresponding cavity so that upon assembly of the mounting bead within the cavity the outer wall portion is forced to assume the curvature of the cavity resulting in a highly effective mounting of the bead. The intermediate section includes a plurality of obliquely disposed crossbars joined together in a pantograph arrangement. The intermediate section further includes a corrugated top wall disposed generally flush with the horizontal surfaces of the slab members and a corrugated bottom wall whereby vertical movement of the top surface of the seal is minimized due to the pantograph arrangement of the crossbars as the seal undergoes expansion and contraction.</p> |
