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 combination for automatically adding chemicals to a water recreational apparatus, such as a spa, hot tub, swimming pool or recirculating bath tub, includes a chemical repository and one or more take off conduits for connecting the chemical repository to the water recirculation system of the water recreational apparatus. A motor operated control valve is controlled by a controller to meter the flow of chemicals into the take off conduit.

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 recreational apparatus, such as a portable spa, hot tub, above ground pool, a recirculating bath tub has a water recirculation system wherein water from the basin of the apparatus is recycled through a pump in water jets disposed in the side walls of the basin. At least one water input valve for controlling the flow of water into one or more of the water jets is controllable by a remote controllable motor. A control panel for controlling the remote controllable motor is disposed proximate to at least one of the seat locations within the water basin.

Abstract: A variable speed electrical motor has windings and a rotor disposed within a motor housing. The motor is capable of operating at one of a plurality of discrete operating speeds. The electrical circuitry for each speed includes both a start winding for only that speed and a start capacitor for only that speed. In an optional embodiment, a switch for varying the speed of the rotor is disposed at a location external of the motor housing. The variable speed electric motor is ideal for use in a water recreational combination, such as a spa, hot tub or recirculating bath tub.

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 water recreational apparatus has a water basin, a pump, a filter and a filter opening. The water basin has side walls and a bottom wall. The water recreational apparatus further includes one or more downwardly directed sweep jets disposed within the water basin proximate to the side walls. The sweep jets are disposed above the bottom wall by a distance of less than 10 inches. The sweep jets are in fluid tight communication with the discharge side of the pump so that water can be pumped through the sweep jets to roil water at the bottom of the water basin. By roiling the water at the bottom of the water basin, debris which tends to collect along the bottom of the water basin is moved upward within the water basin to where it can be removed via the filter opening and the filter.

Abstract: A water recreational apparatus, such as a portable spa, hot tub, above ground pool, a recirculating bath tub has a water recirculation system wherein water from the basin of the apparatus is recycled through a pump in water jets disposed in the side walls of the basin. At least one water input valve for controlling the flow of water into one or more of the water jets is controllable by a remote controllable motor. A control panel for controlling the remote controllable motor is disposed proximate to at least one of the seat locations within the water basin.

Abstract: An adjustable water therapy combination has a water basin for retaining a human patient and a pump driven water circulation system which provides streams of pulsating water to a patient through openings in the water basin. The pump is driven by an electric motor, which is controlled by a controller capable of turning the motor on and off. The controller is also capable of adjusting the pulsing of the water discharged from the pump, both as to frequency and duration. A control panel for adjusting the settings on the pump motor controller is disposed at a location where it is readily accessible to the patient, so that the patient can easily and conveniently adjust the pulsations of water without having to exit the water basin.

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: An adjustable water therapy combination has a water basin for retaining a human patient and a pump driven water circulation system which provides streams of pulsating water to a patient through openings in the water basin. The pump is driven by an electric motor, which is controlled by a controller capable of turning the motor on and off. The controller is also capable of adjusting the pulsing of the water discharged from the pump as to frequency, duration and, optionally, amplitude. A control panel for adjusting the settings on the pump motor controller is disposed at a location where it is readily accessible to the patient, so that the patient can easily and conveniently adjust the pulsations of water without having to exit the water basin.

Abstract: A water recreational apparatus has a water basin, a filter and a pump. The side walls of the water basin have side doors to allow the flow of water from the water basin to the filter. A spring or other biasing means is provided to bias the side wall doors to a closed position when the pump is not operating, but allowing the side doors to open when the pump is operating.

Abstract: A barbecue grill has a heating compartment and a plenum chamber disposed proximate to the heating compartment. The plenum chamber has a central vent for providing access to the central portion of the heating compartment and a pair of opposed side vents to provide access to the two opposed side portions of the heating compartment. A recirculation fan is disposed proximate to the central vent. The recirculation fan is adapted to draw hot gases from the central portion of the heating compartment into the plenum and drive those gases via the plenum into the side portions of the heating compartment via the pair of opposed side vents.

Abstract: A variable speed electrical AC induction motor has windings and a rotor disposed within a motor housing. A switch for varying the speed of the rotor is disposed at a location external of the motor housing. The variable speed electrical AC induction motor is ideal for use in a water recreational combination, such as a spa, hot tub or recirculating bath tub. Because the AC induction motor has a switch which is external to the motor housing, repair or replacement of the switch is conveniently and easily accomplished without having to take apart the electrical motor.

Abstract: A water jet having a housing, a flow tube and a strainer. The housing has an open forward end. The flow tube is disposed within the housing for conducting a stream of water through the open forward end of the housing. The strainer is operably disposed within the flow tube to filter out entrained solid material within a stream of water flowing through the flow tube. The water jet is ideal for use in a water recreational combination such as a spa, hot tub or recirculating bath tub.

Abstract: A water recreational combination has a water basin and a water recirculation system. The water recirculation system includes an ozone generator for injecting ozone into recirculated water. Piping within the water recirculation system includes an ejector for drawing air into recirculated water. The air input opening for the ejector is disposed within the interior portion of the water basin so as to draw off any accumulated ozone above the water level when the basin is covered.

Abstract: An adjustable water therapy combination has a water basin for retaining a human patient and a pump driven water circulation system which provides streams of pulsating water to a patient through openings in the water basin. The pump is driven by a variable speed electric motor and is controlled by a controller capable of adjusting the pulsing of the water discharged from the pump, both as to frequency and duration. A control panel for controlling the pump motor controller is disposed at a location where it is readily accessible to the patient, so that the patient can easily and conveniently adjust the pulsations of water without having to exit the water basin.

Abstract: A controller housing for a water pool apparatus has two separate enclosures disposed back-to-back. The two separate enclosures are electrically connectable by electrical connectors disposed in the adjoining walls of the two enclosures. The electrical connections are aligned with one another so that pressing the two enclosures towards one another automatically places the two enclosures into electrical communication. In one embodiment of the invention, the two enclosures are attached to one another by a pair of disengageable hinges.

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.