Abstract: A chemical intake system has an aperture plate with apertures of varying fluid flow resistance all connected to a first fluid source. A first tube is connected to one of the apertures in the aperture plate and to a suction tube. A second tube is connected to a second fluid source and to the suction tube. The amount of the first fluid flowing into the suction tube is regulated by attaching the first tube to various apertures in the plate. The amount of fluid flowing through the first tube also regulates the amount of the second fluid flowing through the second tube and into the suction tube.

Abstract: A pressure washer for delivering liquid under high pressure has an inlet conduit connected to a liquid supply, an outlet conduit connected to a spray nozzle with a valve which is selectively openable for spraying liquid and a plurality of piston operated pumping cylinders connected in parallel between the inlet conduit and the outlet conduit. A bypass conduit recirculates liquid from the outlet to the inlet conduit. A valve in the bypass conduit selectively permits leakage from the outlet conduit when the spray nozzle valve is open and opens communication between the outlet conduit and the bypass conduit when the spray nozzle valve is closed and pressure builds up in the outlet conduit.

Abstract: An anti-static dust collector includes a tank and an electrically non-conductive flexible hose, both of which are susceptible to the build-up of static electric charge. To remove such charge from the hose, the hose includes a helical wire which is connected to the grounding terminal of the electrical power plug used to supply electric power to the dust collector. Where the housing of the vacuum cleaner is electrically non-conductive, accumulation of electrostatic charge from the housing is removed by a metallic strap connected to the interior of the housing and also electrically connected to the grounding terminal of the power plug.

Abstract: Dispensing within a liquid dispensing and suctioning system is controlled by pinching a flexible tube with a spring-biased actuator. The system includes a slidable extension for pulling the actuator to open the tube to dispense liquid to a surface to be cleaned. The system is assembled with a tubular wand of a wet/dry suctioning system.

Abstract: An arrangement for attaching a rigid vacuum conduit to a nozzle provides high rotational freedom between the nozzle and the rigid conduit while retaining a reasonable degree of airtightness between the conduit and the nozzle. In one form of the invention, the rigid vacuum conduit includes a coupling section of generally cylindrical form adapted to be received into an inlet opening of the nozzle. The coupling section includes a plurality of spaced grooves, each circumscribing the coupling section. The presence of the grooves reduces the frictional loading between the vacuum conduit and the inlet opening while providing a trap for dirt particles that would otherwise jam the vacuum conduit into fixed position in the nozzle. In a further version of the invention, the rigid vacuum conduit comprises metallic material. To reduce frictional loading between such metallic material and the inlet opening of the nozzle, an annular band of low friction material encircles a coupling section of the vacuum conduit.

Abstract: A liquid spray lance is attached to a pump housing by a relatively stiff sleeve. A pump outlet coupling within the pump housing is insulated from transferring vibration to the lance by a hose that passes through the sleeve and that connects the pump outlet coupling to the inlet coupling of the lance. An intermediate portion of the hose is sufficiently flexible and unrestrained as to absorb the pump housing vibration.

Abstract: A housing for a high pressure fluid washer, for example, has mounted within it a fluid pump and a first tank. The first tank may be fully installed within the housing simply by pressing the tank upwardly within an entrance port of the housing. Visual observation of the fluid level within the tank is permitted due to a vertically oriented rib of the tank projecting into a recess window of the housing wall, with such rib being suitably translucent to transparent. The tank rib and recess window of the housing may cooperate to orient the tank within the housing. Where a second fluid tank is required, the housing may be placed atop and aligned to the second tank via respective, interfitting couplings mounted to the housing bottom and to the second tank top.

Abstract: The disclosure concerns a drip cleaning attachment for use in association with a suction cleaner. A housing with a suction nozzle also has supported, at its rear, a liquid drip nozzle which drips liquid toward the surface to be cleaned through a liquid distribution screen. A non-liquid, and particularly a solid rod, cleaning concentrate is supported on the screen. Some of the liquid hitting the screen migrates to the cleaning concentrate rod, dissolves some of it and the concentrate drips to the surface to be cleaned. A scrub brush may be disposed on the attachment for scrubbing the surface.

Abstract: An arrangement for attaching a rigid vacuum conduit to a nozzle provides high rotational freedom between the nozzle and the rigid conduit while retaining a reasonable degree of airtightness between the conduit and the nozzle. In one form of the invention, the rigid vacuum conduit includes a coupling section of generally cylindrical form adapted to be received into an inlet opening of the nozzle. The coupling section includes a plurality of spaced grooves, each circumscribing the coupling section. The presence of the grooves reduces the frictional loading between the vacuum conduit and the inlet opening while providing a trap for dirt particles that would otherwise jam the vacuum conduit into fixed position in the nozzle. In a further version of the invention, the rigid vacuum conduit comprises metallic material. To reduce frictional loading between such metallic material and the inlet opening of the nozzle, an annular band of low friction material encircles a coupling section of the vacuum conduit.

Abstract: Apparatus for dispensing mixed water and cleaning liquid to a surface, including a flow regulator connected with the water supply for maintaining flow pressure, a rigid walled capsule which receives water from the flow regulator, a flexible walled liquid detergent container supported in the capsule and a mixer for mixing the water and the liquid detergent. The mixer includes a blade which pierces the previously sealed flexible walled liquid detergent container. A liquid detergent metering passage extends through the piercing blade. A metering pin may seal that passage, define its cross-section and be openable upon that passage being pressurized due to liquid pressure in the capsule. A second water metering passage communicates into the capsule external of the flexible container. Both of the metering passages communicate into a mixing chamber which in turn communicates with the dispensing nozzle for the mixed liquid. A drain connection to the capsule or to the outlet from the mixing chamber.

Abstract: A dolly for supporting a tank standing on end is provided with a T-shaped plastic base formed by a crossarm and a leg that are joined by an adjustable interlocking connection. Both ends of the crossarm and the end of the leg remote from the crossarm are provided with arcuate grooves that receive the bead surrounding the bottom of the tank. The heads of fastening screws extend over the grooves to retain the bead therein. A metal axle rod extends through a longitudinal passage in the crossarm. This passage has an open top in the region between the grooves in the crossarm so that a tank on the base engages the rod to be supported directly thereby.