Abstract: The resistance of structural elastomer products, such as bearing blocks, to compressive forces is reduced by incorporating therein a plurality of small, separate, reinforcing elements of relatively hard material. Such materials include crushed rock, concrete, glass or certain slags and small metal pieces. The reinforcing elements are congregated in an interior section or core which is covered by a marginal section substantially free from reinforcing elements.

Abstract: The resistance of structural elastomer products, such as bearing blocks, to compressive forces is reduced by incorporating therein a plurality of small, separate, reinforcing elements of relatively hard material. Such materials include crushed rock, concrete, glass or certain slags and small metal pieces. The reinforcing elements are congregated in an interior section or core which is covered by a marginal section substantially free from reinforcing elements.

Abstract: The resistance of structural elastomer products, such as bearing blocks, to compressive forces is reduced by incorporating therein a plurality of small, separate, reinforcing elements of relatively hard material. Such materials include crushed rock, concrete, glass or certain slags and small metal pieces. The reinforcing elements are congregated in an interior section or core which is covered by a marginal section substantially free from reinforcing elements.

Abstract: The resistance of structural elastomer products, such as bearing blocks, to compressive forces is reduced by incorporating therein a plurality of small, separate, reinforcing elements of relatively hard material. Such materials include crushed rock, concrete, glass or certain slags and small metal pieces. The reinforcing elements are congregated in an interior section or core which is covered by a marginal section substantially free from reinforcing elements.

Abstract: A high load bearing for bridges and other structures comprising upper and lower plates and a load bearing elastomer pad between them. The pad has a concave periphery, and the bearing is provided with means preventing shearing between the upper and lower plates but permitting rotational movement between them. Means are provided which mechanically abut the elastomer pad to limit or prevent lateral movement of the upper and lower surfaces of the elastomer pad without preventing bulging of its periphery.

Abstract: Sealing apparatus for joints in roadways which comprises elongated anchor pads secured by studs and nuts to the surfaces of concrete slabs on opposite sides of a gap therebetween and a flexible, resilient, elongated, sealing member extending between and integral with said pads, said pads preferably being formed of a relatively hard elastomeric material having rock fragments embedded therein and reinforced by longitudinally extending metal plates therein. Means is provided for connecting sections of said sealing apparatus end-to-end and preventing leakage at their contacting ends.

Abstract: A seal and cover for expansion joints in roadways and bridges comprised of a block of elastomer having grooves extending downwardly from its top surface to allow for expansion and contraction. A metal plate is secured to the top of the elastomer block to protect the block and help carry the weight of vehicles over the joint. The plate may also have grooves in its top surface to reduce the likelihood of vehicles skidding as they cross the joint.