摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A pool, spa, hot tub or the like having a basin capable of retaining water, a first pump for recirculating a portion of the water within the basin to inlet jets within the side walls of the basin and a second pump for recirculating water from the basin to additional inlet jets in the side walls of the basin. Both the first pump and the second pump are driven by a single double-shaft electric motor.
摘要:
A water jet suitable for use in a water recreational apparatus has (a) a body defining a body interior passageway between a body inlet opening and a body outlet opening, the body having (a) a light well with an open external end and a closed transparent internal end, and (b) an insert disposed largely within the body, the insert defining an insert interior passageway between an insert inlet opening and an insert outlet opening, the insert defining a flange cover at the proximal end of the insert. The insert is moveable within the body between a water open position and a water closed position. The insert is also moveable within the body between a light on position and a light off position.
摘要:
A water recreational apparatus, such as a portable spa, hot tub, above-ground pool or water recirculating bathtub has (a) a water recirculation system, including a water pump and a water heater, (b) a control panel having a plurality of control buttons for controlling the operation of the water pump or water heater, and (c) an audio circuit having a speaker and being adapted to emit an audible signal in response to the engagement of a control button.
摘要:
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.
摘要:
This invention relates to the separation of lithium from lithium-containing materials, primarily ores such as hectoritic montmorillonite, having about 0.1 to 1.0 percent lithium by weight. The process comprises reducing the particle size of the material to less than about 150 microns; mixing the material with a solid source of sulfates and carbonates at predetermined ratios; granulating the mix with an aqueous solvent in order to obtain granules of 1-10 mm; reacting the granules at temperatures of 950-1100° C.; slurrying the reaction products with an aqueous solution; heating the resulting slurry at about 50° to 100° C. for from about 0.3 to 2 hr; separating the solids and evaporating the solution to separate potassium and sodium salts; separating the liquid portion of the cooled brine, which is treated with sodium carbonate, potassium carbonate with heating to remove interfering alkaline earth metals, cooling and separating the aqueous phase followed by treatment with sufficient alkali carbonate to precipitate the lithium carbonate with filtering of the hot slurry to remove the lithium as solid lithium carbonate.
摘要:
A water jet suitable for use in a water recreational apparatus has (a) a body defining a body interior passageway between a body inlet opening and a body outlet opening, the body having (a) a light well with an open external end and a closed transparent internal end, and (b) an insert disposed largely within the body, the insert defining an insert interior passageway between an insert inlet opening and an insert outlet opening, the insert defining a flange cover at the proximal end of the insert. The insert is moveable within the body between a water open position and a water closed position. The insert is also moveable within the body between a light on position and a light off position.
摘要:
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.