Abstract: This invention has an inlet for either gaseous or liquified gases (LP gas requiring a vaporizer within the system) with the proper passages from the inlet to a back seated fuel valve which is opened by a pressure differential (vacuum from the idle system) across a diaphragm engaging a lever which moves a sealed actuating pin inward to open the fuel valve allowing gaseous fuels to move to the outlet through a proper confining passage. Placed between the outlet and the vacuum chamber of the fuel valve diaphragm is a chamber divided by a free floating diaphragm providing two chambers, one chamber is either balanced for air cleaner resistance or vented to the atmosphere, the other chamber having a free passage to the outlet and a passage in the center of the chamber, having communication with the vacuum side of the fuel valve diaphragm, which is throttled by the floating diaphragm diluting the idle vacuum signal to position the fuel valve.

Abstract: An air/gaseous fuel proportioning device includes an air inlet, a fuel inlet, an outlet to feed an air fuel blend to an engine, with the air inlet having an air butterfly valve to throttle the air flow, having a disc-shaped fuel valve resting in a conical bore and having a linkage attached to the air butterfly valve for causing the fuel valve to follow the air butterfly valve in a tilting motion to provide an open area between the disc and cone that relates proportionally to the air flow past the air butterfly valve.

Abstract: An improved bidirectional fuel passage carburetor includes an air density compensator and overall trim, an increased idle air and enrichment device, an air bounce check valve, a fuel valve shutoff, and a load enrichment device. In an alternate embodiment, the carburetor includes a load trim screw for adjustment the main fuel orifice. In yet another embodiment of the invention, temperature compensation for the air-fuel ratio is provided.

Abstract: An apparatus for dividing the vapor and liquid components of a two-phased flow of anhydrous ammonia includes an upper chamber, a lower chamber and a partition member interposed between the upper and lower chambers. The partition member includes walls defining an aperture between the upper and lower chambers. At least one vapor outlet extends through the top of the upper chamber, at least one liquid outlet extends through the bottom of the lower chamber, and at least one two-phase inlet extends through the lower chamber disposed to admit two-phase flow in tangential relation to an internal surface of the lower chamber.

Abstract: A manifold for the application of agricultural ammonia includes an acceleraing chamber between an inlet and a plurality of discharge ports.

Abstract: A device that senses the engine's air demand by reading the change in the air velocity at the venturi and a point up stream of the venturi and uses this negative air pressure signal to provide and control a positive fuel pressure that feeds fuel across a restricting orifice to provide a linear air fuel system.

Abstract: Apparatus for volumetrically controlling a liquefied gas, such as agricultural ammonia, receives liquefied gas from a suitable pressure vessel through conventional hoses and fittings and removes the energy represented by vapor due to the pressure drop from the vessel to the metering means by either refrigeration or vapor stripping or both.

Abstract: An improved carburetor is provided wherein a bidirectional passage is provided between an air velocity reader and a location downstream of a throttle. Metered fuel flows into the bidirectional passage adjacent the air velocity reader. Flow direction in the bidirectional passage is dependent on the pressure relationship between the ends of the bidirectional passage.

Abstract: A gas-liquid blender (30) is provided for metering a liquid into the controlled flow of gas. The blender (30) includes a gas inlet (32), an outlet (42), a variable proportioning device or mixing valve (38) between the gas inlet (32) and outlet (42), and a liquid inlet (36) to the variable proportioning device (38). A diaphragm controlled servo positioning valve (44) is disposed between the gas inlet (32) and the variable proportioning device (38) and is opened and positioned by a diaphragm controlled throttle valve (58) which differentially senses liquid pressure and gas pressure to the variable proportioning device (38). Adjustment means (102, 104) are provided for the throttle valve (58) to increase the pressure difference across the liquid leg of the variable proportioning device (38) between the liquid inlet (36) and the outlet (42) without increasing the pressure difference across the gas leg of the variable proportioning device (38).

Abstract: A device for controlling flow of a pressurized fluid including conduit means for conveying the fluid without substantial directional deviation in the direction of flow. Metering means is disposed in said conduit means for control of the flow of said fluid. A throttle piston is movable into and out of the conduit means and is responsive to the flow of the fluid for maintaining a constant pressure drop across the metering means for any given setting of the metering means. The metering means includes a pierced cylindrical valve body rotatable on an axis transverse to the axis of the conduit means with two scale index structures attached thereto for indicating adjustment of flow rates appropriate to either of two source pressures.

Abstract: A device (10) is provided for controlling the mixture of a gas with air in response to a vacuum drawing the air into a venturi (20). Housing (12) has a bore (14) therein for conveying the gas to the venturi (20). A main valve (30) is disposed in the bore (14) for controlling the flow of gas from a pressurized source. Structure forms a third chamber (68) having a control diaphragm (70) which divides the third chamber (86). One side of the diaphragm (70) is connected to the source of the gas, and the other side is connected upstream of the venturi (20). Structure forms a second chamber (60) with an amplifier diaphragm (74) dividing the second chamber (60) which amplifies the variations in pressure. Structure includes a main diaphragm (86) in fluid communication with the second chamber (60) for actuating the main valve (30) in response to amplified variations in the gas pressure.

Abstract: Disclosed is a compact heat exchanger particularly useful in a vaporizer application, such as a liquefied petroleum gas fuel system. The working fluid side of the exchanger includes a vapor film area of restricted cross section, which may be located at the upstream end, downstream end, or in a mid-region of the exchanger. The vapor film area effectively dams or blocks passage of liquid droplets and thereby aids in the vaporization process.