Abstract: A fuel tank mount for in-tank electric fuel pumps to reduce noise and vibration which includes a sealed outer shell spaced from the elongate housing of the fuel pump and supported in and isolated from the pump by resilient seals. The fuel pump and surrounding shell are supported on a fuel tank top closure. One modification utilizes a wire support. A second modification utilizes a direct mount to the top closure. A vapor by-pass is disclosed for one embodiment which closes in response to liquid fuel under pressure.

Abstract: A pressure regulator valve for use in fuel systems for internal combustion engines utilizing super-chargers for air supply which includes a three-part housing lamination with separate upper and lower diaphragms between the bottom and top housings and the intermediate housing. The lower diaphragm is responsive to fuel pressure and will open a valve to by-pass fuel to a fuel tank. The upper diaphragm is exposed to the pressure of super-charged air to resist the opening of the fuel by-pass valve. The effective areas of the upper and lower diaphragms is designed to have a ratio of about 4 to 1. An adjustable air by-pass valve is provided to adjust the air pressure acting on the upper diaphragm to permit ratio adjustment of the air pressure reaching the regulator to the fuel pressure reaching the engine, for example, a fuel injector leading to the engine.

Abstract: A rotary pump for pumping liquid which includes a rotor combination in the form of a vane pump or gear and rotor with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area and ensmall in the outlet area. Resilient means are interposed between the ensmalling chambers and an outlet to block backflow of the pressurized outlet liquid into pumping chambers containing vaporized liquid instead of solid liquid, thus reducing the pump noise under conditions of vaporization termed "cavitation".

Abstract: A rotary pump for pumping liquid which includes a rotor combination in the form of a vane pump or gear and rotor with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area and ensmall in the outlet area. Pulse absorbtion means are interposed in the fuel passage means to absorb pulses and smooth out the pressurized outlet liquid, thus reducing the pump noise under all conditions of operations.

Abstract: A positive displacement fuel pump utilizing an in-line pump and armature with a flexible drive connection and spring-pressed backing plate for the pump and short cantilever mount shaft for the pump rotor.

Abstract: A fuel supply system for internal combustion engines which utilizes an electronically controlled injection device for liquid fuel which is delivered to a heating chamber in the throttle body of a carburetor and vaporized so that gaseous fuel is delivered to the engine. Vaporization of the fuel is achieved by electric resistance elements and metered exhaust gases directed to the throttle body.

Abstract: An electric fuel pump which is self-contained in a unitary housing with a fuel inlet at one end leading to a rotary eccentric pump, the pumped fuel passing out an outlet at the other end of the housing. A relief valve in the form of a shaped plate at the pump end by-passes fuel when there is reduced demand at the outlet. The outlet end of the pump is formed as a brush holder for the electric drive motor and a magnet retainer for the field assembly. A self-aligning composite pump assembly is utilized with a motor housing. A substantially constant pressure at the outlet with varying outlet flow is the function of the relief valve.

Abstract: A cylindrical Teflon bearing insert for a rotating shaft is molded into a fuel pump end housing with a hexagonal inside diameter and outside diameter recess to provide flat bearing surfaces for a shaft and a mechanical interlock in the end housing. A longitudinal variance in diametric dimensions provides effective shaft contact.

Abstract: An electric fuel pump which is self-contained in a unitary housing with a fuel inlet at one end leading to a rotary eccentric pump, the pumped fuel passing out an outlet at the other end of the housing. A relief valve in the form of a shaped plate at the pump end by-passes fuel when there is reduced demand at the outlet. The outlet end of the pump is formed as a brush holder for the electric drive motor and a magnet retainer for the field assembly. A substantially constant pressure at the outlet with varying flow demands is the function of the relief valve.

Abstract: A system for priming a carburetor for an internal combustion engine which includes a pulse pressure conduit leading from an engine crankcase to a significant portion of a carburetor and a cowl located manually operated valve for opening this conduit during cold starting of an engine. The valve is arranged to have at least three positive positions including "closed" and a plurality of regulated open positions.

Abstract: An electric fuel pump which is self-contained in a unitary housing with a fuel inlet at one end leading to a rotary eccentric pump, the pumped fuel passing out an outlet at the other end of the housing. A relief valve in the form of a shaped plate at the pump end by-passes fuel when there is reduced demand at the outlet. The outlet end of the pump is formed as a brush holder for the electric drive motor and a magnet retainer for the field assembly. A self-aligning composite pump assembly is utilized with a motor housing. A substantially constant pressure at the outlet with varying outlet flow is the function of the relief valve.

Abstract: A small carburetor for chain saws and the like which needs no fuel pump. A spring-biased diaphragm has a radically higher bias than is normal and controls a fuel inlet valve open to the tank such that a higher vacuum is needed to open the valve, thus providing the necessary pull to draw fuel from a tank in any position relative to the fuel tank whether below, above, or to the side of the carburetor. An on-off check valve is interposed between the diaphragm fuel chamber and the main fuel orifice to insure constant negative pressures in the diaphragm chamber. The carburetor body, molded from plastic, has a composite jet insert and plug-in connection to the engine.

Abstract: An air flow directing ramp in the air intake passage of a horizontal updraft carburetor defines an air flow passage of reduced cross sectional area which, among other functions, establishes an increased air flow velocity during starting operations and directs this flow to the main nozzle of the carburetor. The main nozzle is provided with an outwardly flared discharge extension having restricted air passages which substantially improve the mixing action. The pivotally mounted choke plate, located upstream of the air intake passage from the velocity ramp is formed with a restricted opening constituting an air inlet to the air flow passage of the ramp when the choke is closed, while an upwardly curved lip portion of the choke plate cooperates with the upwardly curved velocity ramp when the choke is opened to provide a smooth deflection of intake air from the horizontal intake passage to the vertical mixing chamber.

Abstract: A cover plate for a carburetor having a gasket interposed between the plate and the carburetor body which comprises a plate of rectilinear shape with a bottom peripheral surface to seal against the gaskets on a carburetor body and having a central upstanding boss on the outside of the plate with tapered ribs extending from the top of said boss to the corners of the plate. A screw with a tapered head passes through a tapered opening in said boss and exerts pressure on said ribs to urge the entire plate in tight contact with the carburetor body.

Abstract: A mount for a carburetor which reduces the transfer of heat and vibration from an engine which includes an elastic support ring interposed, with a load carrying capacity, between the mounting flanges of the engine and the carburetor and a neck portion of the carburetor to eliminate metal-to-metal contact. The neck portion has an axial length sufficient to receive the carburetor mounting flange while the elastic support ring is assembled.