Abstract: An arm/rotor hub assembly comprises a hollow rotor and a plurality of hollow arms, each of the arms passing through a corresponding aperture of the rotor sidewall and having one end thereof extending outwardly of the rotor in a generally transverse direction and the other end thereof disposed within the rotor and flared outwardly to a diameter greater than that of the corresponding aperture. The inner surface of the rotor sidewall defines a recess adjacent each of the apertures, and the rotor other ends have a portion thereof at least partially disposed within the recess adjacent the corresponding aperture. The assembly is put together by inserting the other arm ends through the corresponding apertures and employing a flaring tool inserted into the rotor through the open rotor end to flare the other arm ends outwardly within the rotor to a diameter greater than the apertures and force some portions of the other arm ends into the recesses and other portions intermediate the apertures and the open rotor end.

Abstract: A method and apparatus for cleaning surfaces using a high velocity stream or streams of cleaning fluid. The high velocity stream or streams issue from one or more nozzles that are moving at a high velocity relative to the surface to be cleaned and are directed at the surface at an inclined angle thereto. In one embodiment, the source of cleaning fluid is under a high pressure of about 200 to 700 pounds per square inch and the nozzles are moving in a direction so that the velocity imparted to the issuing stream by each moving nozzle adds to the already high velocity of the stream due to the high pressure alone of the source of cleaning fluid. In another embodiment, two nozzles are rotated at a high velocity about an axis perpendicular to the surface to be cleaned with each nozzle being directed at a different area of the surface and having a different flow rate, angle of inclination to the surface, spray pattern, and/or spraying arc.

Abstract: A method and apparatus for cleaning a surface using a high velocity stream or streams of cleaning fluid. The high velocity stream or streams issue from one or more nozzles that are moving at a high velocity relative to the surface to be cleaned. In a preferred embodiment, three nozzles are mounted to a common hub member with two of the nozzles directed at the carpet so that they tend to move the hub member in a first direction about the axis of rotation. The third nozzle is directed at the carpet so that it tends to move the hub member about the axis of rotation in a second direction opposite to the first. The first two nozzles determine the direction of rotation and the third nozzle is then moved relative to the surface so that the velocity imparted to the stream issuing from the third nozzle because of its motion adds to the existing velocity of the stream due to the high pressure alone of the source of the cleaning fluid. This embodiment has been found to work particularly well on carpets.

Abstract: A swimming pool mounted rotatable head for a water jet pool cleaning system adapted to rotate in a non-uniform sequential manner during a pool cleaning operation to maintain deleterious matter in suspension in the water so that it may be removed by the main drain or skimmer inlets of the pool water circulation system.

Abstract: A dishwasher has a unitary spray and deflector disc member in spaced relation with its wash chamber top wall of a diameter so as to extend a sufficient distance across the chamber to intercept upwardly directed sprays of water. A diametrical spray conduit is incorporated with the disc including inlet means for accepting water from a top wall feed line for flow into two radial discharge streams to maintain the conduit full of water while exiting spray port means at each end of the conduit cause rotation of the disc. The water entering the disc inlet means and exiting the spray port means imparts stability to the disc to reduce the sound level within the chamber caused by impinging sprays thereon.

Abstract: An improved dishwasher is provided, which is particularly intended for domestic low-pressure water supplies. The dishwasher has a container with a floor and an open top which is closable by a lid. A water inlet extends into and a water outlet drains water from the container. A rotatable spray unit is supported rotatably in the container, and has a tubular T-shaped spray member. The T-shaped member includes a substantially vertical tubular stem, and a first tubular arm and a second tubular arm, both of which are substantially horizontal and are joined at the top to the vertical stem and have their ends closed off. A fluid guide joins the water inlet to the vertical stem for supplying water into the vertical stem and the horizontal arms. A number of spaced holes are provided in the vertical stem and in the first and second arms for providing jets of water for rotating the tubular spray unit and for washing and rinsing articles placed inside the container.

Abstract: A rotary liquid spraying device comprises a nozzle and a liquid spraying head rotatably mounted to the nozzle, the spraying head including an internal chamber having a shaped inlet orifice receiving the jet from the nozzle, and a plurality of outlet orifices which produce lateral jets and a reaction force for rotating the head. The internal chamber is of substantially larger cross-sectional area than either the inlet, or all the outlet orifices together, to define a reservoir in which the velocity of the nozzle jet is substantially reduced and is used to pressurize the liquid before it is issued at a high velocity through the outlet orifices. The shaped inlet orifice includes side walls converging towards each other in the direction of the inlet chamber and terminating in a narrow diameter throat at the mouth of the chamber.

Abstract: In apparatus for producing a rotating jet or spray of fluid, e.g. water for cleaning purposes, a nozzle for producing the jet or spray is mounted for rotation about a first axis and is arranged with the axis of the nozzle spaced from the first axis and inclined thereto such that fluid leaving the nozzle will exert a force on the nozzle tending to rotate it about the first axis, and means are provided driven by the nozzle for causing a flow of the medium in which the apparatus is situated such as will generate a force on the apparatus in the direction of the first axis.

Abstract: A water driven pool cleaning device to sweep a swimming pool floor which includes a housing and a conduit to connect the housing to a water source. Water flow is directed through the housing and through a rotatable pair of arms, journaled for rotation above the housing, to distally arranged nozzles which are arranged to cause the arms to rotate and to cause debris on the pool floor to be flowed by water toward the housing. The housing defines a trap to collect the debris. The arms are connected to the housing so as to permit travel of a roller on the arms over the high and low areas of a pool floor.

Abstract: An articulated spray applicator particularly suited for use in cleaning the interior of segmented flues and the like characterized by a plurality of series connected angularly related conduits, each having an internal passage a longitudinal axis and a plurality of spray orifices, each orifice having an axis extended tangentially to a circle concentric to the axis, a stationary support supporting adjoining conduits for rotational movement about the longitudinal axes thereof and interconnecting the passages in a fluid transferring series relationship, and a coupling connecting the passage of at least one of the conduits with a source of fluid under pressure, whereby the fluid is discharged as a spray from the orifices and a turning moment acting about the axes is established for imparting rotation to the conduits.

Abstract: A tank washer such as for use in washing bulk milk tanks, including a liquid-driven spray head rotatably carried on a supply tube extending downwardly into the tank. The spray head is caused to rotate at a relatively low speed, permitting generally square jet streams of the washing liquid to develop a spray pattern effectively completely wetting the interior of the tank to provide effectively optimum washing action. The spray head includes a drain port for draining the apparatus upon termination of the washing liquid delivery. The spray head may be formed of a plurality of similar annular elements and securing structure for securing the elements in a tubular assembly adapted to be rotated coaxially about the delivery tube by reaction force generated by the jet streams. The annular elements cooperatively define the jet ports and include deflector shoulders for directing a portion of the jet streams angularly upwardly.

Abstract: A pool cleaning device for use in connection with a pump to circulate water of a pool, which device includes a housing with an outlet and structure connecting the outlet to the circulating pump and a rotatable arm journaled to the housing including a jet to cause the arm to rotate and including an inlet to direct water from the pool toward the housing, so that debris which is in the water adjacent the bottom will be directed to exit through openings in the housing and through the outlet of the housing to be filtered in a filter which is conventionally included in the combination with a pool pump.

Abstract: An evaporation accelerator has a base with a housing rotatably affixed thereto and float means adjustably affixed thereto to float the accelerator in an evaporatable fluid. Air-operated propulsion means which receives compressed air from air supply means is connected to the housing to rotate it. Support members are also secured to the housing and extend generally radially away from the housing. Scoop means are secured to the support members and have a first end positioned in the fluid and a second end positioned above the surface of the fluid so that as the housing rotates fluid is scooped up and ejected over the surface of the fluid.

Abstract: A fluid delivery system for a dishwashing appliance of the type having movable upper and lower racks and upper and lower spray arms has a telescoping tower in fluid communication with a manifold during operation. A face seal between the upper spray arm and the telescoping portion of the tower is effected upon buildup of fluid pressure in the tower sufficient to bring the telescoping portion into engagement with the upper spray arm and thereby deliver wash liquid to the upper spray arm. A generally axially-extending seal actuated by the fluid pressure in the tower seals the telescoping portion to the fixed portion of the tower during delivery of wash liquid through the fluid conduit system. When the pumping of the wash liquid is terminated, the telescoping portion of the tower automatically retracts.

Abstract: A spray assembly having at least one intermittently operating nozzle which comprises a spray device rotatably mounted on a pressurized water source within a washing chamber of a dishwashing appliance and having at least one nozzle thereon in isolated fluid communication with the water source so as to be operative only during select portions of a revolution of the spray device about the water source.