Abstract: A fuel injection nozzle of the inwardly opening type has a valve member slidable in a bore in a nozzle body which is secured to a holder. The valve member is biased by a first spring into contact with a seating and is movable from the seating by fuel under pressure. An abutment rod is engageable by the valve member after a predetermined movement of the valve member away from the seating. The abutment rod is biased by a second spring housing in an insert mounted in screw thread engagement with a bore in the holder. The rod extends through and is guided by an aperture in the insert and is further guided by guide means removed from the insert. The guide means can be a bush carried by the holder, the coils of the first spring or the valve member.

Abstract: A vehicle having a boom assembly for applying herbicides, pesticides, or fertilizers in fluid form, i.e. as liquid, powders or granules, over tracts of land, has opposite end-portions of the boom projecting away from respective opposite sides of the vehicle. Each end-portion is connected by a universal joint to a central frame which is fixed to the vehicle, and its weight is supported by guys which are tensioned by a spring and interconnect the two boom end-portions. A spring leaf skid is provided under each boom end-portion and bears on the ground only if the vehicle rocks. The guying is so arranged that rocking of the vehicle in one direction causes the slack from the boom end-portion whose skid bears on the ground to be fed to the other boom end-portion so that the spacing from the ground of the two boom end-portions remains acceptably constant despite rocking of the vehicle.

Abstract: An electrostatic spraying apparatus in which an electrode is mounted adjacent to the sprayhead, means are provided for causing a first electrical potential to be applied to liquid emerging from the sprayhead, and further means are provided for applying a second electrical potential to the electrode. The difference between the first and second potentials is sufficient to cause an intense field to be developed between the emerging liquid and the electrode, sufficient to atomise the liquid. The electrode has a core of conducting or semiconducting material sheathed in a "semi-insulating" material. This "semi-insulating" material has a dielectric strength and volume resistivity sufficiently high to prevent sparking between the electrode and the sprayhead and a volume resistivity sufficiently low to allow charge collected on the surface of the material to be conducted through the "semi-insulating" material to the conducting or semiconducting core.

Abstract: A fuel injection nozzle for an internal combustion engine includes a valve member which is slidable in a nozzle body. The body is provided with a bore in which is formed a seating and to support the valve member there is provided a sleeve which is an interference fit within a wider portion of the bore. Fuel under pressure is conveyed by grooves defined on the outer surface of the sleeve from a nozzle inlet and the fuel flows from the grooves through slits formed in the sleeve, to a space defined between the valve member and the bore. The pressure of fuel acts on the valve member to lift the valve member from the seating and the slits are sufficiently narrow to retain particles of dirt entrained in the fuel.

Abstract: A positive displacement dispenser for storing and dispensing viscous materials like toothpaste is disclosed. The dispenser has a longitudinally-extending housing having an upper surface and side surfaces defining a chamber for storing viscous material, a discharge orifice in the housing through which material is dispensed, a threaded rod having an axis extending longitudinally through the chamber, and a piston mounted on the threaded rod by means of a central threaded opening. The piston is advanced along the threaded rod toward the discharge orifice to dispense material from the chamber by depressing a pivotal lever attached to the upper surface of the housing. This causes a drive bar projecting from the lever to move within a plane and turn a rotatable wheel coaxial with the threaded rod.

Abstract: There is provided a stop valve-carrying rotary nozzle for a machine tool designed to eject a fluid onto the portion of a work which is being worked thereby improving the work-cooling and cutting efficiency of the machine tool.The present rotary nozzle consists of a nozzle body having a throughbore and a spherical member having a throughbore that is in turn fitted within the fluid outlet side of said throughbore of the nozzle body with a sealing O-ring being interposed between the spherical member and the throughbore of the valve body, while allowing a free rotation of the spherical member on its own axis therein.

Abstract: A process for sprinkling water onto a lawn, comprising the steps of: (a) providing an in-ground pop-up sprinkler comprised of a cylindrical housing, a motor compartment structure, and rotatable sprinkler head, wherein 1. said cylindrical housing has a sprinkler compartment, a motor compartment, and an inlet communicating with said motor compartment, 2. the bottom end of said cylindrical housing is closed except for said inlet, 3. above the bottom end of said cylindrical housing, the housing forms said motor compartment, 4. above said motor compartment, said housing is radially enlarged to form said sprinkler compartment, 5. said sprinkler head is capable of limited extension and retraction, 6. when retracted, said sprinkler head is enclosed within said sprinkler head compartment formed within said housing, and 7.

Abstract: A multivortex device is provided comprising a series of adjacent plates with specially designed grooves and perforations which, when mounted transversely of a uniform fluid flow in a duct, results in the formation of numerous small adjacent flow vortices either all rotating in the same direction (co-vortices) or adjacent vortices rotating in opposite direction (counter-vortices). The fluid at the peripheries of adjacent co-vortices move in opposite directions and friction converts their rotational kinetic energy into turbulence within a few vortex diameters downstream from the multivortex device. The fluid at the peripheries of adjacent counter-rotating vortices move in the same direction, such that they roll upon one another substantially without friction and persist for many vortex diameters downstream from the multivortex device. The adjacent plates of the multivortex device can be provided with additional grooves and passageways which allow a second and/or third fluid to be introduced within each vortex.

Abstract: An emitter includes a body member having a head portion. The head portion has an outer peripheral surface that defines an elongated channel and the channel extends along a tortuous path from an inlet end of the channel to an outlet end of the channel. A cover of heat shrinkable material is shrunk over the outer peripheral surface of the head portion covers the channel to form a turbulent flow passage. The head portion may include generally opposed, first and second transverse surfaces between which the outer peripheral surface extends, the cover extending partially over the transverse surfaces to form flanges that engage the transverse surfaces. The heat shrinkable material may be shrinkable both axially and circumferentially for this purpose. One embodiment includes an emitter outlet in the form of an annular basin that is fed with a non-radially disposed slot to produce a self-cleaning vortex action.

Abstract: A sprinkler head shutoff valve for use with underground lawn sprinkler systems includes a central housing including a lower water inlet port and an upper water exit port. The lower water entry port may include a threaded male fitting for threadedly engaging a conventional plastic tee or elbow connector of the type often used in underground sprinkling systems. The upper water exit port includes an internally threaded female fitting for engaging a conventional plastic riser tube interconnecting the shutoff valve to a sprinkler head. A spring-biased plunger is disposed within the housing for engaging a gasket encircling the water exit port to seal off the flow of water therethrough. A rod having a length slightly greater than that of the riser tube is inserted within the riser tube and depresses the plunger for allowing water to flow to the sprinkler head.

Abstract: A method and an apparatus for controlling a flow rate of viscous fluid for feeding the fluid under pressure from a pump through a hose to a spray gun with a control unit. A temperature and a pressure of the viscous fluid in the hose is detected. Based on the detected temperature and a temperature-supplying pressure characteristic data stored in the unit, viscous fluid supplying pressure for obtaining a desired set flow rate is calculated. Based on the detected pressure of the fluid and the calculated supplying pressure, a signal for obtaining a desired supplying pressure is obtained and outputted. The gun is switched on to operate the pump at a constant speed to provide the desired set flow rate. Alternatively, only the pressure is detected and a pressure which is obtained in a previous operation and stored in the unit is used.

Abstract: A high pressure water/abrasive jet cutting nozzle has a pair of centering rings that act through body-mounted balls to position a nozzle element-holding collet. The interior surfaces of the centering rings are eccentric with respect to the longitudinal axis of the nozzle assembly so that rotation of a centering ring will cause the nozzle element collet to shift transversely. By rotating one or the other, or both, centering rings the axis of the nozzle element can be adjusted relative to the nozzle jet-forming element so as to align the nozzle element with the water jet.

Abstract: The invention relates to a process for the controlled disposal of an aerosol cloud by means of directed sound waves of high intensity in the audible frequency range. According to the invention, sound waves are emitted by an aircraft (8, 10) operating close to the periphery of the cloud (4). The frequency spectrum of the wave consists of a basic frequency and a superposing frequency of twice the basic frequency valve and phase-shifted in relation to the basic frequency at substantially 90.degree., so as to cause the particles to coagulate and to migrate towards the sound source, and to be collected at the aircraft.

Abstract: A novel four passage intake nozzle and valve structure is provided for use with a specially designed, novel water deflection member to provide a pop-up water spray nozzle. The novel intake nozzle and valve structure includes a hollow valve plug, having a lower cylindrical portion provided with four specified longitudinally-extending passages, and an upper cylindrical portion provided with four specified, longitudinally-extending passages the upper and lower passages surrounding a central core. The upper passages are connected to associated lower passages through an associated, smaller diameter aperture. Parts in the valve plug, communicate with an associated one of the four lower passages. An apertured disc, is rotatably movably connected to the valve plug, by means of a shaft disposed within the central, hollow core, the apertured disc having ports therein, the leading edges of the ports therein being adapted to index precisely with the leading edges of selected ports of the valve plug.

Abstract: A water sprinkler which includes a hollow sprinkler body, a rotor chamber within the body, a freely rotatable stem extending through the body and being in fluid flow communication with the rotor chamber, a sprinkler head on the open end of the stem for rotation therewith, a rotor within the chamber being freely rotatable about the stem and being capable of limited axial sliding movement relative thereto, a water inlet passage communicating with the interior of the stem and also water inlet ports directing water flow into the chamber to cause rotation of the rotor striker means on the rotor co-operable with rotor impact receiving portions on the stem, arranged so that when water flows through the sprinkler, the rotor rotates at high speed and effects relative slower rotation of the stem and sprinkler head.

Abstract: In the spray head for the administration of a multi-component material by means of gas, a gas channel (2) with gas connection (3) is provided, which channel is divided by a separating web (4) into a plurality of channels (2a2b) running parallel to the separating web. Into these channels there open out boreholes (5, 5a) for receiving cannulas. The open ends of the boreholes (5, 5a) go into grooves (7, 7a) which serve for guiding the cannulas (6, 6a). The grooves are arranged parallel to the gas channel (2). The separating web (4) protrudes beyond the channel ends (9, 9a).

Abstract: An automatic system for the selective distribution of liquid streams comprising a plurality of nozzles, each with an inlet end and an outlet end and adapted to permit a flow therethrough of a liquid stream, the flow being variable in intensity. The invention further comprises a valve for controlling the flow intensity of the liquid stream through each nozzle and at least one decorative element coordinated with the flow of the liquid, wherein the flow through the nozzle is individually controllable for each nozzle by a microprocessor.

Abstract: A circuit for controlling operation of valves which supply atomization air and pattern shaping air and coating fluid to a spray gun. In response to a trigger signal, air is immediately supplied to the spray gun. After a predetermined time delay, fluid is supplied to the spray gun. Fluid continues for the remainder of the duration of the trigger signal and air is continued for a predetermined time after the trigger signal has ceased.

Abstract: The nozzle assembly of an electrostatic spray gun has an adapter which is made of an electrically insulating material and has a front surface facing in the direction of propagation of material issuing from the orifice of the nozzle. The adapter has a frustoconical extension which surrounds the orifice and whose external surface defines with the front surface of the adapter an annular space for the tips of electrodes which ionize air flowing toward the spray of material that issues from the orifice. The locations of the tips of electrodes (preferably very close to the front surface of the adapter) and the inclination of the external surface of the frustoconical extension determine the location of contact of ionized air with the spray. The tips of the electrodes are shielded from mechanical damage by being located in the annular space.

Abstract: A self-adjusting rotary-arm irrigation sprinkler comprises an intermediate piece (8) between the propulsion tube (1) and rotary arm (13), which supports the rotary arm and the position of which is adjustable in height relative to the propulsion tube by means connected to the propulsion tube.