Abstract: An irrigation emitter including a fixed longitudinally extending passage wall element having a longitudinally extending restricted flow groove therein, and a flexible longitudinally extending passage wall element overlying the fixed wall element and contacting the fixed wall element along its side margins to define therewith a flush passage and adapted to collapse against the fixed wall element to confine flow to the restricted flow groove. One embodiment of the irrigation emitter having a single fixed wall element and flexible wall element forming a single flush passage and restricted flow groove. Another embodiment includes a ring of fixed wall elements and flexible wall elements forming a ring of flush passages and restricted flow grooves which may be modified for axial discharge or deflected discharge, and the grooves arranged for drip flow, or spray flow; and when arranged for spray flow, may be deflected to produce a segmental spray of selected circumferential extent.

Abstract: A carburetor has a manually adjustable control to simultaneously change fuel flow rates from the power valve and accelerator pump circuits to compensate for altitude changes varying the air density and thereby the air/fuel ratio of the mixture flowing from the carburetor.

Abstract: A low pressure drop adjustable choke has a variably adjustable tapered annular port for metering flow of a fluid. The annular port is defined by a tapered plug extending through a mating, correspondingly tapered seat. The area of the port is selectively varied by axial movement of the plug relative to the seat. The device is mechanically adjustable to a selected flow rate, which may be indicated on a precision indicator.

Abstract: An air-precluding flow-regulating device for maintaining a predetermined flow rate through a conduit from a site of higher to a site of lower elevation, comprising: a section of normally collapsed soft resilient tube forming at least a part of the conduit and having a length at least as great as the variation in back pressure expressed in head at the site of lower elevation, said tube being disposed to contain the ambient pressure level within its length.

Abstract: A controller, wherein the throttling range may be changed without affecting the calibration point, comprises a restrictive passage between an outer tube and an inner tube, the outer tube having one end connected to a source of pressure and the other end connected to atmosphere for establishing a linear pressure gradient along said restrictive passage, the inner tube having an output port at one end and an orifice for connecting the linear pressure gradient to the output port, and a controller for positioning the orifice along said pressure gradient.

Abstract: A pressure compensated emitter device for controlling rate of water discharge in a drip irrigation emitter tube, wherein the tube is of resilient material and is partly contained within a plenum, wherein an increase pressure results in a reduction of tube diameter. The tube may contain a core of copper or other metal which will inhibit root growth in the vicinity of the discharge orifice.

Abstract: An air valve for a carburetor has its lower end mounted for pivotal movement between open and closed positions relative to the air and fuel mixture conduit and carries a metering rod which extends generally in a horizontal direction. The metering rod has an end extending within a metering orifice of an orifice plate in an opening of the mixture conduit wall. The metering rod is urged by a coiled torsion spring upwardly against the orifice plate. The torsion spring has a small coil with a relatively high spring rate and a large coil with a relatively low spring rate. The large coil continuously urges the rod into engagement with the upper surface of the orifice plate defining the orifice, while the small coil urges the rod into engagement with the orifice plate only after the air valve is around one half open.

Abstract: A flowrate control device comprising a housing, a housing inlet for coupling to a liquid flow supply, a housing outlet, a first housing wall portion defining a throughflow path communicating at the ends thereof respectively with the inlet and the outlet, a second housing wall portion defining a chamber communicating with the inlet and being otherwise closed, a flexible wall portion common to the first and second wall portions and serving as a separating partition between the chamber and the flowpath at least the first housing wall portion being formed with at least one tapering protrusion extending into the flowpath so as to form a construction therein and being so shaped that upon maximum displacement of the flexible wall portion into the flowpath a permanent residual flowpath remains open.

Abstract: A flow control valve comprises a body having a longitudinal bore therethrough at one end terminating in a first port and intermediate its ends a second port which communicates with said bore and is adapted for a connection to a cylinder port. The body has an apertured valve seat intermediate said ports and communicating with said first port. A valve element is adapted for registry with and for adjustment away from said seat. An apertured cap is threaded into the other end of the body and receives a manually adjustable valve control pin threaded thereinto and nested and sealed within said cap for relative longitudinal movements therein. A valve pin retainingly engages the valve element and at one end is secured to the valve control pin. A spring is interposed in compression between said valve element and valve control pin normally biasing said valve element towards said seat.

Abstract: A flow control valve having a valve chamber which is adapted to receive fluid under pressure and which comprises a valve member having a surface with a groove therein and an outlet passage terminating at one end in a port in the groove. A resilient element is provided in the valve chamber in confronting relationship with the groove. The resilient element has an aperture in registry with the groove. The resilient element and the valve member are mounted for relative movement so as to change the relative position of the groove and the aperture, and this permits the manual selection of the flow rate. The pressure in the valve chamber urges the resilient element into the groove an amount which is dependent on the magnitude of the pressure. In this way the selected flow rate is made independent of inlet pressure fluctuations.

Abstract: A multiple stage expansion valve for use in an air conditioning system for an automotive vehicle including multiple stage flow control orifices located between a refrigerant condenser and a refrigerant evaporator, the high pressure side of the refrigerant gas compressor being in fluid communication with the inlet side of the condenser, the low pressure side of the compressor being connected to the outlet side of the evaporator through a suction throttling valve device, said expansion device comprising multiple stage orifice valves defined in part by a movable piston that responds to the pressure differential across the expansion device to establish optimum refrigerant flow through the air conditioning system during operation at high load, for establishing a relatively high fluid flow restriction during operation at low and moderate loads, and for establishing a moderate fluid flow restriction during operation at high loads and low compressor speeds.

Abstract: An apparatus for regulating the flow rate of a fluid, comprising a casing having an annular or cone-shaped fluid passage, for radial flow (inwardly or outwardly) between an inlet and outlet which are spaced radially and form unobstructed flow paths to the whole of the fluid passage. The geometry of the fluid passage is defined for a compressible and incompressible fluid so that laminar flow is achieved in the fluid passage. The apparatus further provides a very rapid dynamic response, essentially free of hysteresis, and substantially no internal generation of fluid flow turbulence resulting in a minimum of noise and freedom from cavitation. In an adjustable configuration the apparatus provides a proportional fluid valving function. In a nonadjustable configuration the apparatus provides a laminar flow restriction.

Abstract: An expansion device for use in a reversible vapor compression refrigeration cycle for producing, upon demand, either heating or cooling. Two devices are mounted in opposed relationship in a supply line carrying refrigerant between a first heat exchanger and a second heat exchanger. Each expansion device includes a body having a flow passage therein opening into an expanded chamber. A free-floating piston is slidably mounted in the chamber and is moved to a first position when refrigerant is passed through the line in a first direction and to a second position when the direction of flow is reversed. A centrally located metering port passes through the piston while fluted channels are formed in its outer periphery. When in the first position, the fluted channels are closed against one side wall of the chamber and refrigerant is throttled through the metering port from the high pressure exchanger (condenser) into the low pressure exchanger (evaporator).

Abstract: The upper end of the chimney supports an outer upwardly converging funnel and an inner coaxial upwardly converging funnel which are movable relative to each other to open and close an auxiliary annular channel for exhaust gas flow. The drive for moving the funnels relative to each other is connected through the wall of the chimney to the inner funnel via support arms.

Abstract: An automatic expansion valve for controlling refrigerant flow from a condenser to an evaporator in which the valve includes an apertured deflectable disc which defines the refrigerant expanson orifice with other structure within the valve, and with the flow passage arrangement in the valve body being such as to subject the upstream face of the disc to the pressure of the liquid refrigerant, and the downstream face of the disc to the pressure of the expanded vaporous refrigerant so that the disc deflects in accordance with the differential pressure on the opposite faces and accordingly effects changes in the effective opening of the expansion orifice.

Abstract: This device is essentially a butterfly type valve which acts as a flow constriction by rotating a disc body with its planar axis parallel to or at right angles to fluid flow through a channel. The disc body has an additional capability of extending sectors from the body beyond the original boundary or peripheral edge of the body, thereby increasing the restriction of the flow area surrounding the disc.

Abstract: A pressure regulator particularly adaptable for use in aerosol cans in which a chamber is provided having inlet and outlet ports, and a pressure reactive diaphragm, and a dimensionally changeable inlet throttling body, positioned in the chamber, is dimensionally controlled to close and open the inlet port by variations of pressure in the chamber.

Abstract: Fluid flow through a conduit is controlled by varying the pressure of the fluid. The fluid passes through a normally closed valve comprising a flexible sleeve held in pinched closed condition by an elastic material which is isolated from all pressures except those transmitted through the sleeve.

Abstract: A resilient tube of predetermined length, inside diameter and outside diameter has embedded therein, in axial relation, a helical winding of substantially non-resilient material. The helix is effective to resist forces exerted on the walls of the tube by internal fluid pressure tending to change the inside and outside diameters of the tube but is ineffective to resist the forces tending to lengthen the tube as the internal fluid pressure is increased or to resist the resilience of the tube material in restoring the tube toward original length as internal fluid pressure is decreased.By using the tube as an enclosure to define an opening, the area of the opening can be selectively varied by establishing fluid pressure within the tube at the required values; and by varying the extent of the opening as a function of sample height, an accurate core sample can be obtained when the variable opening device is used in conjunction with a sampler for bulk loads of fruits or vegetables.

Abstract: An automatic expansion valve for controlling refrigerant flow from a condenser to an evaporator in which the valve includes a deflectable member which defines a refrigerant expansion orifice with other structure within the valve, and with the flow passage arrangement in the valve body being such as to subject at least part of the opposite faces of the deflectable member to the different pressures resulting from refrigerant flow through the expansion orifice so that changes in the deflection of the deflectable member are in accordance with differential pressure across the orifice and accordingly effects changes in the effective opening of the expansion orifice.

Abstract: A combustible mixture of air and minute fuel droplets is produced for supply to the cylinders of an internal combustion engine. This mixture is formed by accurately controlling both the atomization of fuel and the mass flow rate of air over substantially the entire operating range of the engine. These controls are accomplished by introducing liquid fuel into a stream of intake air and uniformly distributing the fuel in the air followed by passing the air and fuel mixture through a constricted zone to increase the velocity of the mixture to sonic. The sonic velocity air at the constricted zone divides the fuel into minute droplets that are uniformly entrained throughout the air stream. The area of the constricted zone and the quantity of fuel introduced are adjustably varied in correlation with operating demands imposed upon the engine.

Abstract: A flow control device includes a resilient member defining an opening through which fluid flows, the opening becoming smaller upon increase of pressure of fluid supplied thereto, and relatively larger upon decrease of pressure of fluid supplied thereto. A check valve allows flow of such fluid in an irrigating direction through the device upon a certain level of pressure of supplied water being achieved, but closes when such pressure falls below such certain level to block flow through the device.

Abstract: Discharge velocity of the air-fuel mixture being supplied through a variable venturi flow passage device to an internal combustion engine at idle to near idle operation of the engine is optimized by controllably varying the area ratio between the throat and exit planes of the device. Opposite jaw faces of the device define the flow passage that is gradually opened and closed in correlation to demand imposed on the engine between idle and full throttle operation. Area ratio control in one form is achieved by apparatus operative to selectively vary the diffuser angle between the opposing jaw faces. Area ratio control in another form is achieved by apparatus operative to effect a localized passage opening at idle of selectively different aspect ratio than the aspect ratio defined over the full longitudinal extent of the jaw faces.

Abstract: The contact plate for mass-exchange apparatus consists of two disks facing each other with their end surfaces and capable of mutual rotation round the axis thereof. Each disk has one slit-like hole shaped as an Archimedean spiral so that when one disk rotates with reference to the other said holes overlap each other.

Abstract: A self-flushing irrigating valve formed, at least in part, of an elastically deformable material which, when subjected to differential pressures below a preselected value, occupies an open position forming a passage for the flushing of water therethrough; and when subjected to differential pressures above a preselected value, forms a constricted passage for trickle flow of water therethrough. The valve, when in its trickle flow condition, tends to effect further constriction on further increase in differential pressure thereby tending to produce a uniform flow rate through a range of effective pressures.