Abstract:
A water recreational apparatus has a water basin combination, a cover for covering the water basin combination and a cover removal combination. The cover removal combination includes a cover attachment arm which is rotatably attached to the exterior of the water basin combination. The cover attachment arm is adapted so that the rotation of the cover attachment arm about its attachment axes to the water basin combination alternatively moves the cover between a closed position and an open position. Drive means, such as electric motors, are provided for powering the cover attachment arm about its attachment axes so as to open and close the cover.
Abstract:
A centrifugal pump has a pump case and a rotatable impeller disposed within the pump case. A central aperture is defined within the rearward wall of the pump case to facilitate the connection of an impeller drive shaft to the impeller. A drive shaft seal is disposed within the central aperture to seal the impeller drive shaft to the pump case. At least one or more grooves are defined in the rearward wall of the pump case to carry liquids to and from the drive shaft seal. One or more radial ridges are disposed on the rearward side of the impeller to encourage liquids to flow within the grooves to and from the drive shaft seal to continuously wash away precipitates around the seal and to cool the seal.
Abstract:
A rotating spa jet has a body and a nozzle. The body has an upstream end, a downstream end and a flow path defined between the upstream end and the downstream end. The nozzle is disposed within the flow path proximate to the downstream end of the body. The nozzle is rotatable about a pin and is not supported in any way by ball bearings.
Abstract:
A water pool apparatus, such as a portable spa, pool, hot tub or recirculating bath tub having a double seal configuration. The water pool apparatus has a water recirculation system which includes a centrifugal pump. The centrifugal pump has a double seal which includes a seal housing and a pair of spaced-apart seals. The seal housing defines an enclosed reservoir chamber. By the invention, any liquids which are successful in leaking past the first seal are trapped within the reservoir chamber. As the reservoir chamber accumulates liquid, the liquid can be recycled back into the water recirculation system by a drain conduit running between the reservoir chamber and the suction side of the pump.
Abstract:
A method of operating an internal combustion engine comprises the steps of (a) pressurizing a liquid fuel to a pressure above 150 psig; (b) heating the liquid fuel to a temperature above 500° F. to produce a heated liquid fuel; (c) suddenly reducing the pressure of the heated liquid fuel sufficiently to vaporize the heated liquid fuel to form a vaporized hot fuel; (d) combining the vaporized hot fuel with oxygen to form a vaporized hot fuel/oxygen mixture; (e) introducing the vaporized hot fuel/oxygen mixture into the internal combustion engine; and (f) combusting the vaporized hot fuel/oxygen mixture within the internal combustion engine.