Abstract: An emulsifier assembly for emulsifying air, steam, and milk in preparing cappuccino and like beverages, particularly for use with bar-size espresso coffee makers, being also adapted for heating up milk in preparing cafe au lait, comprises a body, a steam delivery channel opening into a suction chamber of the body, an air intake line and a milk intake line. Both lines are in communication with the suction chamber, and a flow rate adjuster is connected in the air intake line. A before shutter member is opertive in the air intake line, and a restrictor member is operative in an end section of the milk intake line. Both of these members are hand-actuatable.

Abstract: A spiral fluid flow is available for conveying, drying or separating pulverulent substances particle substances, slurries or gases. To obtain a high speed stable spiral fluid flow, there is used a device provided with a slit formed between a main conical cylinder connected to a pipe line and a subcylinder connected to the main cylinder on the opposite side remote from the pipe line, and a pressurized fluid is supplied through this slit. The device is also provided with a pressurized fluid supply section.

Abstract: There is disclosed herein a spa water jet aerator which proportionately controls the flow of water and air with a single control movement of a valve mechanism. The air and water apertures in the valve body are so shaped and located such that the air flow is controlled so as to be a function of volume of water flow. The function can be varied by varying the shapes and placements of the air and water passageways in the valve body relative to the locations and shapes of the air and water passageways in the aerator body. A key feature is that the air passageway can never be open to any extent when the water passageway is not open sufficiently to create a lower pressure in the mixing chamber than is present in the air supply line since this can lead to malfunction in ganged operation. A separate clamping mechanism allows adjustment of the water flow control valve to be independent of clamping movement of the clamping mechanism.

Abstract: An apparatus for mixing fluids includes at least one noncircular orifice having unequal major and minor axis dimensions, with the major axis dimension being less than approximately 5 times the minor axis dimension. A first fluid is emitted from the orifice as a jet for mixing with another fluid in a region downstream of the orifice. The mixing region extends downstream a distance at least equal to the minor axis dimension, and then either terminates in a wall in the path of the jet or continues downstream to a total distance of at least approximately 3 times the minor axis dimension. The mixing region has a lateral width of at least 2(a+0.4x) in a direction parallel to the major axis and a lateral width of at least 2(b+0.4x) in a direction parallel to the minor axis, where a and b are one-half the major and minor axis dimensions, respectively, and x is the distance downstream of the orifice.

Abstract: This invention relates to a process for injection of fluid e.g. slurry into e.g. flue gases, and a nozzle device for the accomplishment of the process. The process according to the invention is characterized in that a thin stream of fluid e.g. slurry is injected into a wider stream of gas to form disintegrated drops, at which the fluid stream is peeled off on its way into the gas stream, the fluid stream is made to turn 180.degree.

Abstract: An oil-water emulsifier comprises a Venturi member having an inlet for receiving oil, an oil-water emulsion outlet and an opening extending therethrough from the inlet to the outlet. The opening of the Venturi member comprises a diameter-reducing portion which connects to a throat portion having a substantially smaller diameter than the inlet, the throat portion being connected to an expanding portion extending from the throat to the outlet, the diameter of the outlet of the opening being substantially greater than that of the throat portion. A plurality of water injection holes extend from the outer periphery of the Venturi member to the throat portion so as to be in communication with the oil flowing through the throat portion, the injection holes being preferably substantially perpendicular to the direction of oil flow through the throat portion. Also disclosed is an oil-burner boiler system incorporating the above-described oil-water emulsifier.

Abstract: An air induction unit having a first induction means to induce secondary air through a first induction opening into a stream of primary air to produce an air stream of mixed primary and secondary air, and a second induction means to induce additional secondary air into the mixed air stream through a second induction opening.

Abstract: A versatile portable fluid dispensing, manually controlled gun with instant selectivity of hard, soft or foam flow of liquids, either of water or a solution, with or without entrainment of fluid such as air and with or without a foaming flow of the fluid whereby each of a great many different relations of discharge can be selected with a versatile solution discharge nozzle that provides selectively changeable liquid solid jet streams or soft flows of liquids with or without entrainment of a fluid such as air; and selectively with entrainment of air operable either with or without a foaming agent in the liquid. Instant controls interchangeably operated provide any one of twelve different dispensing relations with water alone or with a chemical foaming agent, each supplied separately or together as a mixture; in each of these phases, namely jet flow, soft flow and foam flow.

Abstract: A foaming device including a housing with a cylindrical passage therethrough and four housing ports which provide communication between exterior and interior of the housing, the housing ports being connected to sources of fluids; a cylindrical spool slidably disposed within the housing provided with an axial passage therethrough and three spool ports in communication with the spool passage; the spool being displaceable to on, off and cleaning positions in a way that one has to go through the cleaning position when displacing the spool from the on to off position or vice versa.