Abstract: A clog resistant pump for washwater employs two water flow circuits. The first powered by a conventional motor-driven pump uses filtered washwater and drives a jet-pump discharging unfiltered washwater from the washing machine. The intake or discharged water from the jet-pump is used to operate a self-cleaning filter providing water for the first circuit of the motor-driven pump. The position of the filter in the stream of wastewater and adjustment of the filter apertures in size and area reduce clogging yet allow sufficiently filtered water to permit a conventional high efficiency motor-driven pump to be used in the first stage.

Abstract: A vacuum unit, intended particularly for a vacuum toilet system, includes two valves (4, 6) which can be connected to a compressed-air source, an ejector (10) which includes an inlet nozzle (10a), an outlet nozzle (10b) and a vacuum opening (10c). The ejector is connected to the first valve (4) via the inlet nozzle, and to a first vacuum-unit connection (U1), via the vacuum opening. A piston valve (16) includes a first inlet (16a), a second inlet (16b) and an outlet (16c). The first inlet connects the piston valve with the ejector outlet nozzle (10), the second inlet connects the piston valve with the second valve (6), and the outlet connects the piston valve with a second vacuum-unit connection (U2). A check valve (17) is mounted between the piston valve outlet (16c) and the second vacuum-unit connection (U2). A passageway connects the second valve (6) and the second inlet (16b) of the piston valve with a further ejector inlet (10d).

Abstract: A suction assembly employs an air induction tube to induct air into the recirculating water pump to cause the pump to cease pumping operation when the front face of the assembly is blocked. The induction tube is connected to a bleed path formed between the induction tube and a surrounding coaxial face tube extended into the assembly from the front face. When the face is blocked by hair or the like, water in the induction tube bleeds into the main chamber of the assembly and empties the induction tube. Air is then pulled into the pump, causing the pump to lose prime thereby reducing pump pressure to zero and allowing the hair or other blocking material to be removed.

Abstract: A separator jet to separate a first liquid from a second liquid upon which the first liquid is floating. The separator jet has a main body with a base and a top. There is an inlet nozzle in the base to receive a transport fluid. An outlet nozzle with a diameter larger than the inlet nozzle receives fluid from the inlet nozzle and is positioned within the main body to define an inlet for the first and second liquids in the top of the main body. An inlet in the base of the outlet nozzle, adjacent the inlet nozzle, receives the first and second liquids and allows the first and second liquids to be transported by the transport fluid out of the outlet nozzle. The jet may be mounted on a float and, in the preferred embodiment, may be mounted on a vessel that can be anchored in a waterway to clear oil from that waterway or mounted to be able to sail in polluted water.

Abstract: Skimmer apparatus for swimming pools and the like having a receptacle in which a skimmer basket is fitted. The receptacle provides a chamber into which pool water flows through the skimmer. Water is caused to flow into and through the receptacle by a connection within the receptacle to the makup water inlet of the pool. The inlet water discharging into the pool through the chamber of the receptacle and the flow of the water by an ejector effect causing flow through the receptacle thereby causing a substantial amount of the pool water to be recirculated through the receptacle although it is not recirculated through the conventional pool suction pump and inlet which operates to supply the inlet water pressure for activating the skimmer apparatus.

Abstract: An ejector 110 having an additional nozzle 173 for issuing a fluid at a relatively high pressure through a throat 113 of the ejector 110 into an outlet 114 from the throat 113, so as to clear any material lodging in the outlet 114 and/or the throat 113. The additional nozzle 113 may be co-axial with the main nozzle 140 of the ejector 110, or angularly disposed from it.

Abstract: To improve the erosion resistance of the mixing chamber of a jet pump employed to pump particulate containing fluids, this invention contemplates directing a pressurized source of clean fluid through an annular jet-type orifice, thus providing an annular jet of high velocity clean fluid at the inlet end of the mixing chamber which surrounds an orifice connected to the source of particulate containing fluid and effects the pressurizing and pumping of the particulate containing fluid by the well known jet diffusion technique. Additionally, this invention contemplates the provision of a second annular nozzle surrounding the first mentioned annular nozzle through which a relatively clean fluid is discharged, thereby interposing a clean fluid barrier between the momentumly transferred particulate containing fluid and the surface of the mixing chamber to protect such surface from the abrading effects of the particulate material.

Abstract: A petroleum well has a plurality of centrifugal pump stages, a jet pump stage, and an electrical drive motor. A recirculated portion of the output from high pressure stages of the centrifugal pump provides power fluid for the jet pump, and the jet pump aspirates fluid from lower pressure centrifugal pump stages. The balance of the output of the high pressure stages goes to the surface as production. The output of the jet pump supplies the high pressure stages. A centrifugal cleaner upstream of the power fluid inlet for the jet pump cleans that stream of particulates. The overall flow rate through the centrifugal stages exceeds the production rate of the pump by the amount of power fluid for the jet pump. The jet pump caps the assembly and can be separately removed for servicing and adapting the pump to the flow requirements of the well.

Abstract: Pumping ejector having a fixed tubular ejector body passing through the wall of a protective cell. In its part which projects into the cell this body has an extension provided with a first lateral connection for the admission of a pumping steam flow, a second lateral connection connected to a pipe for admitting a fluid to be pumped and an axial diffuser for the outflow of said fluid shaped in convergent-divergent manner and fitted into the body behind the diffuser. It also comprises a tube having an intake opening for the steam flow introduced into the body by the first connection and has at its end facing the diffuser a nozzle for accelerating the steam for the entrainment of the fluid to be pumped.