Abstract: A pool assembly is provided. The pool assembly includes a pool body defining a pool cavity for containing water. The pool body includes an injection manifold disposed in an inlet wall of the pool body for providing a flow of water into the pool body. An ejection manifold is disposed in an exit wall of the pool body for removing the flow of water from the pool body. Removable plates attach to the manifolds for altering the flow of water. A stairway and seat subassembly is constructed of mesh is disposed adjacent the exit wall to allow water to flow therethrough.

Abstract: A swimming pool with a circulating water flow includes a plurality of side walls adjacent a swimming compartment, one of the side walls including an outlet, at least one inlet positioned at each lateral side of the outlet, and a plenum arrangement on a side of the one wall opposite the swimming compartment. The plenum arrangement is in communication with each inlet and the outlet. A water propulsion device is positioned within the plenum arrangement and effects a pair of circuitous water flow paths within the swimming compartment.

Abstract: A flow duct is provided in which water is caused to flow by way of a delivery device disposed in a circulation line. In order to be able to adapt the flow inside the duct to the particular requirements, and/or achieve a laminar flow over the entire flow region, a plurality of circulation lines is provided, each having a controllable delivery device, wherein the circulation lines lead into the flow duct separately from each other, and wherein the discharge openings of the circulation lines are distributed over the face wall of the flow duct.

Abstract: The present invention relates generally to propulsion systems, and, more particularly, to a propulsion system including an axial flow water pump assembly and a laminar flow box assembly for generating a streamline laminar slipstream of water velocity that is used in aquatic therapy, aquatic sport fitness rehabilitation, aquatic rehabilitation, swimming, and a variety of other functional therapy and training modalities.

Abstract: The Invention is a swimming machine operated by a hydraulic pump and hydraulic motor. A first and a second tubular rail support the swimming machine in a swimming pool and are configured to resemble a swimming pool ladder and thus disguise the swimming machine. The configuration of the tubular rails substantially prevents use of the swimming machine as a ladder. A radio-operated remote control proportional relief valve selectably bleeds hydraulic fluid from the high pressure side to the low pressure side of the hydraulic pump, allowing remote control of the velocity of water in the pool.

Abstract: A portable device is provided for generating a current in a vessel having a side-wall, the vessel containing a fluid. The device includes a housing having an inlet and an outlet, and a motor attached to the housing. A propeller, driven by the motor, is positioned in the housing. A float is attached to the housing to create a buoyant force sufficient to keep the portable device afloat in the fluid. Fluid is drawn into the housing through the inlet side and forced out of the housing through the outlet side to generate the current in the vessel.

Abstract: A swimming pool includes a swimming tank, which stores water for swimming; and an upstream tank, which stores water to be supplied into the swimming tank. The pool further includes a downstream tank, which stores the water streamed from the upstream tank through the swimming tank; and a pump, which forces the water stored in the downstream tank to the upstream tank. The water in the upstream tank has an energy head that is higher than the water in the swimming tank so as to generate water current in the swimming tank.

Abstract: A swimming pool includes a swimming tank, which stores water for swimming; and an upstream tank, which stores water to be supplied into the swimming tank. The pool further includes a downstream tank, which stores the water streamed from the upstream tank through the swimming tank; and a pump, which forces the water stored in the downstream tank to the upstream tank. The water in the upstream tank has an energy head that is higher than the water in the swimming tank so as to generate water current in the swimming tank.

Abstract: In the method for manufacturing monocrystalline structures, parts or workpieces of metallic super-alloys on substrates with a monocrystalline structure or monocrystalline structures, the surface of the substrate is melted with an energy beam of high energy density from an energy source. The material which is to be introduced into the monocrystalline structure is supplied to the melted region of the substrate. The supplied material is completely melted. The energy input with the energy beam is regulated and/or controlled in such a manner that the speed of solidification and the temperature gradient lie in the dendritic crystalline region in the GV diagram, outside the globulitic region.

Abstract: A bathtub comprises: a tub body (1) for accumulating bath water; a bath water treating section for activating the bath water; and a water circulating section (2) for forcedly circulating the bath water between the tub body and the bath water treating section. The bath water treating section is a magnetic water treating section (3) and/or a ceramic ball water treating section (4) to activate the bath water in a wide range.

Abstract: A screw driving device is loaded within a box-shaped casing, straightening plates are disposed on the front surface of the casing so as to face to the front surface of screw vanes, and water holes are bored in a rear portion and side portions of the casing, the casing being held on a support frame mechanism capable of being adjusted in vertical movement.

Abstract: A method and apparatus for controllably injecting high velocity jets of water at an elevation at or above water level towards a buoyant object (e.g., a boat or participant in an inner tube) that is floating in a deep water recreation attraction, and causing injected water-to-object momentum transfer and directed buoyant object movement irrespective of the motion of water upon which the buoyant object floats. Structurally, a water conduit is positioned horizontally at or near the surface of a body of water. Adjacent to this conduit is positioned, in parallel corridor like fashion, a second water conduit or a benign retaining structure. The inside width of the corridor is a distance sufficient to permit passage of the buoyant object. An array of water injectors is aligned on the inside of the conduit-formed-corridor at an elevation at or above water level.

Abstract: An apparatus for generating a stream in a body of water has at least one cylinder installed under water, and a water-jet pump housed in the cylinder. The pump draws water in through one end of the cylinder and produces a stream of water accelerated by a driving fluid supplied from an external source. The stream is discharged through another end of the cylinder to promote a flow in the body of water.

Abstract: A water exercise device made up of a closed loop track, a soaking pool and a channel providing a walking path therebetween. The water depth is generally uniform in depth to provide running and walking exercise but deeper areas may be provided to require swimming in a part of the track and total immersion in the soaking pool. A constant water flow rate is maintained in the track and a temperature gradient may be maintained between the track and the soaking pool to provide temperatures appropriate for different activity levels by a user.

Abstract: A swim tank slightly longer than a human and slightly wider than the maximum spread between fingertips is divided into upper and lower channels by polycarbonate or members extending across the width of the tank and having a rectangular outlet at the top front through which water is expelled. A vaned wheel at the rear is driven by an induction motor from a power source of controlled frequency.

Abstract: A swim-in-place pool has horizontal inner and outer circulating waterways arranged in such manner that a portion of the inner waterway coincides with a portion of the outer waterway. The non-coincident portion of the inner waterway then provides a swimming space. A plurality of impeller blades are suspended in a spaced series within the coinciding portion of the two waterways, each of the blades in its operative condition extending transversely of that waterway and occupying substantially all of its cross-sectional area. A power drive advances the blades in unison along the coinciding portion of the two waterways so that a rather fixed body of water is captured between each two adjacent blades and advanced therewith. A diversion structure adjacent the entry of the non-coincident portion of the inner waterway diverts a continuous flow of water in a relatively non-turbulent state into and through the swimming space.

Abstract: A circulating type water flow pool having a tank portion and a circulating passage formed in a lower portion thereof. The circulating passage has a riser portion at one end which extends to an upper portion of the tank portion. A delivery port is formed in the end of the circulating passage in communication with the tank portion. At its other end, the circulating passage is formed with an intake port in communication with the tank portion, and a water flow control member is mounted on the delivery port at the riser portion of the circulating passage. A screw blade of a delivery unit is actuated by a driving motor, and it is disposed facing the delivery port. Water in the circulating passage is sucked out by the screw action of the screw blade, creating a jet flow, which is delivered toward the delivery port. The jet flow is straightened by a water flow control member mounted on the delivery port, thereby creating a powerful water flow.