Bridge seal for expansion grooves

Claim 1

A sealing device for a clearance space of a comparatively large extent between two facing operative members, said sealing device being formed as an extruded elastomeric body having a wall construction of generally rectangular shape in cross-section comprising, in combination, an arrangement of functional walls disposed in respective locations as an upper wall, a lower wall, and a pair of opposing side walls bounding said rectangular cross-sectional shape, additional angularly oriented functional walls operatively arranged to retain a corner shape in each of said four corners of said rectangular cross-sectional shape disposed at each said corner bounded by intersections of said upper, lower and opposite side functional walls, and a cooperative arrangement of internally located support walls for said functional walls consisting of plural walls in circumferentially spaced relation connected to extend radially from said functional walls towards a location centrally of said rectangular cross-sectional shape, an elongated hexagonal-shaped wall arrangement in said rectangular cross-sectional shaped central location in connected relation to said plural walls so as to stabilize the normal positions thereof and having opposite pointed corners in a horizontal plane thereof and V-shaped indentations in said opposite walls in facing relation to said pointed corners to receive said pointed corners in seated relation therein, whereby in response to external forces, said hexagonal-shaped wall arrangement flattens out into said V-shaped indentations during the collapsing in size of said seal.