Abstract: An aerosol distributor and an arrangement for filter leakage detection in a gas filtration system comprising such aerosol distributor, the aerosol distributor being configured to be positioned in a gas stream upstream of the filter, said aerosol distributor comprising: a housing comprising a primary chamber in fluid connection with two or more secondary chambers; the housing having an inlet for admitting a test aerosol from an aerosol source into the primary chamber and passages for releasing the test aerosol from the primary chamber into each of the secondary chambers; said secondary chambers being elongated and provided with a plurality of outlet holes along the length thereof for releasing the test aerosol from the secondary chambers into a gas stream surrounding the aerosol distributor; characterized in that the dimensions of the inlet, the primary chamber, the passages, the secondary chambers and the outlet holes are selected such that during operation, the pressure of the test aerosol in the primary cha

Abstract: An aerosol distributor for filter leakage detection in a gas filtration system, said aerosol distributor being configured to be positioned in a gas stream upstream of the filter, said aerosol distributor comprising: a rotatable distributor housing comprising a hub in fluid connection with two or more radial chambers evenly distributed around said hub, the distributor housing having an inlet for admitting a test aerosol from an aerosol source via the hub into the radial chambers, each radial chamber being elongated, sealed at a distal end, and provided with a plurality of outlet holes distributed along the length thereof for releasing the aerosol from the radial chamber into a gas stream surrounding the aerosol distributor, and wherein said aerosol distributor further comprises an actuator configured to rotate the distributor housing around a central axis thereof.

Abstract: A nozzle for use in a high pressure water jetting system is provided including a stationary housing, a rotating shaft, and a central passage within the shaft for communicating high pressure fluid to the nozzle. The shaft may include communication passages to provide fluid from the central passage to a forward fluid pressure chamber defined between an outer peripheral surface of the shaft and the housing. A rear fluid pressure chamber may be defined between the shaft and the housing and a restriction may be defined between the housing and the inlet end of the shaft, the restriction configured to receive fluid from the rear fluid pressure chamber and transport it to a chamber communicating with the atmosphere. The restriction may be formed as an annular gap between the housing and the inlet end of the shaft and configured to decrease in volume when the shaft moves axially forward.

Abstract: Disclosed is a drizzle type spray apparatus, especially a wetting drizzle spray apparatus, that is configured to attach an adjustable member onto an erectable ground-based tube, the adjustable member is made of adjustable units having rotatable angles, and works to operatively make up a sprinkle head, so as to allow change in the spray direction of the sprinkle head.

Abstract: The present disclosure provides a system and method for a cleaning apparatus that includes a swash assembly for allowing independent control of the nozzle pitch from the nozzle rotation, and further includes supplying a cleaning fluid through the same apparatus used to rotate the nozzle. The method and system allows cleaning with spray patterns of substantially 360 degrees spherical ranges of motion. The nozzle angle can be controlled by hydraulic cylinders that can reversibly translate a rack along a longitudinal axis of a nozzle assembly to engage a pitch gear coupled to the nozzle. The system is automatically resettable to a default position upon failure of hydraulic pressure. Generally, a plurality of nozzles are used to balance the side forces on the main mast. A remote control system allows an operator to design and control an optimal cleaning procedure, and to adjust the nozzle rotation, angle, and cleaning regime.

Abstract: The invention relates to a railway vehicle comprising a fire-fighting system having a supply container for extinguishing agent, a system of pipes, means for dispensing extinguishing agent, and a pressure-generating means. To improve the reliability of this system, it is proposed that the pressure-generating means be coupled to a compressed-air supply belonging to the railway vehicle, that a quiescent pressure can be generated in the system of pipes with the help of the pressure-generating means, and that a case of fire can be detected by means of a pressure drop in the system of pipes.

Abstract: A toy water gun of the type for ejecting fluid therefrom. The toy water gun may include a housing having a longitudinal axis and a reservoir attached to the housing for holding fluid. A holding area may be included which is selectively in fluid communication with the reservoir. A pump may be provided for generating pressure differential across a pair of one-way valves to move fluid from the reservoir to the holding area and from the holding area to at least one nozzle. The at least one nozzle may rotate as the pump is being actuated by a user. A rotating bezel may be provided to vary the angle of the nozzle relative to the longitudinal axis of the toy water gun.

Abstract: A self-adjusting rotating joint (1), especially for liquid distribution devices, including a first substantially tubular element (3), adapted to be connected to a liquid feeding inlet pipe, a second substantially tubular element (2), adapted to be connected to a liquid distribution nozzle, connecting means (6, 25) adapted to connect pivotally first (3) and second element (2), so as to allow their reciprocal rotation around a common axis (V), with limited axial relative displacement, transmitting a reaction force generated by the jet and lying on a plane passing through said common axis (V), braking means (15, 16, 17, 18, 20, 21, 22, 23, 30, 31) to counter the relative rotary motion of the element (2, 3) about the rotation axis (V). The rotating joint is characterised in that the connecting means are made of a substantially cylindrical tubular element (6, 25) with substantially constant outer diameter.

Abstract: A method for fabricating a DRAM device, comprising the steps of: providing a SOI substrate upon which a first silicon layer, a buried oxide film and a second silicon layer are stacked; forming an isolation film in the second silicon layer; forming first and second trenches in the second silicon layer and the isolation film; forming gate electrodes in both sidewalls of the first and second trenches; forming first and second impurity regions in the upper surface of both sides of the first trenches and third and fourth impurity regions beneath the first and second trenches by injecting impurity ions into the second silicon layer; forming a capacitor to contact the first and the second impurity regions via first and second contact holes in a first intermediate insulating layer, and a first wiring to contact with the fourth impurity region via third contact hole in the first insulating layer; forming a first conductive layer pattern including a second wiring to contact with the first wiring via fourth contact hole

Abstract: A lawn sprinkler and bearing therefore is provided. The lawn sprinkler has first and second rotatable sprinkler elements supported on a support stand. The bearing allows the sprinkler elements to rotate in opposite directions to evenly distribute fluid over an area to be irrigated.

Abstract: One spring and two spring embodiments of a fuel injector having a nozzle body and needle valve with cooperating inner and outer metering rings providing a metering passage which (a) meters fuel at a reduced rate during an initial increment of valve lift, (b) assists in maintaining fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment of valve closure and (c) dampens secondary pressure waves to prevent secondary fuel injection.

Abstract: The self-rotating nozzle has a hallow shaft adapted for connection to a source of pressurized fluid. A body has an axial bore upon a central axis secured over one end of the shaft and has a counterbore. The shank with an end portion extends from the body into which the counterbore extends with the counterbore terminating in a pair of radial ports. A head bears against the body and is journaled upon the shank. A fastener upon the end portion retains the head against axial movement relative to the body. A pair of spaced jet flow orifices are mounted upon outer portions of the head extending generally parallel to the central axis but on oppositely extending axes inclined at a small acute angle to axes parallel to the central axis to provide a balanced rotational reactive power torque to the head, there being a pair of fluid passages in the head communicating with the ports and with the orifices respectively, the orifices adapted to provide high velocity streams of pressurized fluid to a surface to be cleaned.

Abstract: A water sprinkler which includes a casing and an oscillatory sprinkler head mounted on the casing. The casing includes a water inlet and two water outlet paths. Within the casing there is a structure which cyclically connects the water inlet first to one outlet path and then to the other. The oscillatory sprinkler head includes two spray nozzles which direct water generally tangentially. The nozzles are arranged so that the reaction force when water flows from one nozzle rotates the sprinkler head in one direction and when water flows from the other nozzle the sprinkler head is rotated in the other direction. Each nozzle is in communication with a respective one of the outlet paths. The angle through which the sprinkler head moves can be adjusted.

Abstract: A spraying apparatus and a method for spraying a liquid in a pattern which can be adjusted without stopping the spraying operation. The apparatus comprises a pair of nozzles, each including an orifice providing a liquid stream therefrom. The nozzles are mounted on opposed radially extending arms, each arm extending a predetermined distance along an axis which is normal to the central axis of the apparatus. Means are provided for adjusting the angular orientation of the nozzles with respect to the central axis to enable each nozzle's orifice to extend at any predetermined angle within the range of parallel to the central axis up to an angle of approximately 45.degree. with respect to the central axis. When the nozzles are oriented with their respective orifices parallel to the central axis the apparatus provides a pair of liquid streams in a relatively straight line which is parallel to the axis.

Abstract: One spring and two spring embodimenls of a fuel injection having a nozzle body and needle valve with cooperating inner and outer metering rings providing a metering passage which (a) meters fuel at a reduced rate during an initial increment of valve lift, (b) assists in maintaining fuel pressure at the valve seat to reduce fuel dribble and cavitation erosion during a corresponding last increment or valve closure and (c) dampens secondary pressure waves to prevent secondary fuel injection.