Abstract: A valve for a surf pool having a frame of generally horizontal and vertical members, a leg pivotally attached to the higher horizontal member, a foot at the end of the leg for opening and closing the valve and an actuator mounted on the lower horizontal member for pivoting the leg. The foot may include oblique surfaces for reducing its drag and for enhancing the seal between the foot and a valve throat in response to hydrostatic pressure on the foot.

Abstract: A surfing wave pool assembly has a construction so that a continuous front breaking, surfing wave is established. This permits body surfers or surfboards to surf on the forward edge of this advancing wave for most of the length of a pool. The continuous wave front is established by the rapid discharge of water from an elevated reservoir into the deep end of the pool over a reef. A substantial amount of water in the entire assembly is saved by utilizing an elevated floor in the reservoir and a restricted area conduit from the elevated reservoir to openings at the deep end of the pool. The elevated reservoir establishes a sufficiently high head of water to create a surfing wave, yet the elevated floor and the restricted area conduit means substantially limit the volume of water in the assembly required to create the surfing wave.

Abstract: A slide structure for sleds for human occupancy is disclosed, and is designed to have human occupant sleds sliding down into a body of water. The slide structure has a support framework on which a plastic sheet material is provided and a water supply means supplies only a thin film of water to the upper surface of the plastic sheet material. This conserves power and water, yet the thin film provides a very low coefficient of friction, so that the sleds attain a high speed for a quiet, fast, smooth, and more exciting ride, yet with reduced wear on both the slide and sleds.