Abstract: A concrete module for at least partial submergence in the surf to dissipate the energy of wave action and to promote the deposition of beach-restoring sand and pebbles comprises a series of passages which converge toward the shore-facing side of the module and terminate in an upwardly-directed opening which deflects the incoming water flow upward to further dissipate the wave energy and to create a reaction force on the module which tends to rotate or tilt it toward the shore. This tendency aids in neutralizing the natural tendency of barriers to rotate toward the sea as a result of sand being scoured out from beneath the seaward side of the barrier as a result of downwardly-deflected incoming wave energy.

Abstract: An erosion control revetment and wall made from preformed blocks which are secured to elongate support members by interlocking sleeves. The block is formed with transversely extending slots which extend from the top end to the bottom end of the block and have an enlarged opening on the top end for receiving a tubular sleeve which encircles the elongate support members. The outer diameter of the sleeve is snugly received within the enlarged opening, but is larger than the width of the remainder of the slot, preventing unintended removal of the block from the support member. The elongate support members may be semi-rigid rods or cables. The revetment is formed from alternating rows of blocks which are offset by one elongate support member relative to blocks in adjacent rows. Alternatively, the blocks may be assembled into a wall having vertically aligned blocks or blocks which are offset relative to one another in adjacent rows.

Abstract: An off-shore reef-like structure for preventing beach erosion. The structure comprises a string of prism-shaped modules placed in side-by-side relation in the surf area along a line defined by a sand bar, for example, where waves normally break. Each module has oppositely inclined front and rear walls adapted to face seaward and landward, respectively. At least one flow control passage extends through the module so as to converge from its front to rear wall openings. Incoming waves flow through the passage in a manner dissipating the wave energy while minimizing the wave impact forces tending to move the module. An opening is provided in the module bottom wall in communication with a through conduit enabling the module to fixedly seat or interlock itself in either sandy or coral-like shoreline areas. The module is uniquely designed to provide a minimal air lifting load for helicopter installation.

Abstract: A traffic barricade or marker comprises a base in the form of a conventional pneumatic vehicle tire having a pair of substantially vertical flexible plastic tubular posts upstanding from the tire upper sidewall from aperture means located diametrically across from each other. The tubular posts in their unflexed condition are substatntially straight and upwardly diverging in a symmetrical manner away from the tire principal axis. A substantially rectangular structural member has a pair of longitudinally spaced tubular-like connector formations thereon of a size to be freely telescoped over the upper end portions of said posts. The structural member has a predetermined major dimension between its connector formations so as to continually flex the upper end portions of the posts into substantial parallel relation whereby said connector formations are releasably retained on the posts.

Abstract: A wall comprising concrete blocks each having a longitudinally extending, wedge-shaped groove in one side thereof, the groove communicating with a pair of bores that extend through the block. The block is molded in a hollow shell or frame open at its top and bottom, the frame removably mounting a support from which depends a pair of cores by means of which the block bores are formed. Associated with the frame is a compactor and ejector member having at its lower end a base adapted to be accommodated snugly within the frame and having on its lower surface elongate, wedge-shaped grooving means that forms the groove in the block. The grooving means is longitudinally slotted to accommodate the core support and the grooving means and the base also are bored to accommodate the cores.