Abstract: The invention provides a quick disconnect fluid coupling for connection of fluid conduits and incorporates automatically actuated valves for closing the end of each fluid conduit when the connection is broken, and specifically provides for minimal fluid loss from the line at the time of making or breaking the connection.

Abstract: An engine comprises a combustion chamber and a throttle movable between a low speed position for operating the engine at a low speed and a range of positions spaced from the low speed position for operating the engine within a range of speeds above the low speed. An enrichment fuel delivery system communicates with the combustion chamber and a source of fuel and is operative for introducing fuel from the fuel source into the combustion chamber. The enrichment fuel delivery system includes a control mechanism which is operatively connected with the throttle. The control mechanism operates the enrichment fuel delivery system in response to advancement of the throttle from its low speed position to introduce fuel into the combustion chamber for a predetermined time interval.

Abstract: An engine comprises a combustion chamber and a first fuel delivery system which communicates with the combustion chamber and which is adapted for connection with a fuel source. The first fuel delivery system is operative for introducing fuel from the source into the combustion chamber. A second fuel delivery system also communicates with the combustion chamber and is adapted for connection with a fuel source. The second fuel delivery system is operative for introducing fuel from the source into the combustion chamber in addition to the fuel introduced by said first fuel delivery system. The second fuel delivery system includes a fuel pump for pumping fuel through the second fuel delivery system.

Abstract: A carburetor comprises an air induction passage and a choke valve movable in the air induction passage between a fully closed position and a range of positions advanced of the fully closed position. A predetermined second position of the choke valve is located within this range of positions. A stop mechanism is selectively movable into and out of the path of movement of the choke valve of prevent and permit choke valve movement from its second position toward its fully closed position. A thermo-sensitive element controls the movement of the stop mechanism such that the stop mechanism is disposed in the path of choke valve movement whenever the ambient temperature around the carburetor exceeds a predetermined level.

Abstract: An internal combustion engine comprises a combustion chamber and a crankcase which extends from the combustion chamber. A primary fuel delivery system introduces fuel from a fuel source into the combustion chamber, and a primer fuel delivery system is selectively operable for introducing fuel from the source into the combustion chamber in addition to fuel which is introduced by the primary fuel delivery system. A collector assembly communicates with the crankcase for accumulating residual fuel from the crankcase, and a residual fuel delivery system supplies fuel from the collector assembly into the combustion chamber. A control valve mechanism is connected to the primer fuel delivery system and the residual fuel delivery system for blocking the supply of fuel by the residual fuel delivery system during operation of the primer fuel delivery system.

Abstract: An engine comprises a combustion chamber and interior walls which define a fuel induction passage having a fuel outlet port communicating with the combustion chamber. A first fuel delivery system introduces fuel from a fuel source into the combustion chamber. A second fuel delivery system includes a nozzle which extends into the fuel induction passage adjacent to the fuel outlet port and is selectively operable by means of an associated valve mechanism for introducing fuel from the source directly into the combustion chamber through the nozzle in addition to the fuel which is introduced into the combustion chamber by the first fuel delivery system.

Abstract: Disclosed herein is an internal combustion engine including a cylinder having a head end, a piston reciprocal in the cylinder relative to the head end, a port communicating with the cylinder in spaced relation to the head end and subject to pressure variation in response to piston reciprocation, a manually operable primer pump communicating with the port for pumping primer fuel into the cylinder through the port, and a fuel pump including a pulse chamber defined in part by a diaphram communicating with the port and operable in response to pressure variation to effect fuel pumping operation.

Abstract: The primer valve disclosed herein includes a housing having an inlet communicating with a fuel source, an outlet communicating with an engine intake manifold, and a flow passageway extending therethrough from the inlet to the outlet. A port surrounded by a valve seat separates the flow passageway into upstream and downstream portions. Flow of the fuel through the flow passageway is controlled by a diaphragm which is movable relative to the valve seat between port opening and port closing positions and is urged toward the port closing position by a spring. Fuel pressure in the upstream portion of the flow passageway acts on the port closing side of the diaphragm and forces the diaphragm toward the port opening position to permit the fuel to be admitted into the engine intake manifold. As a vacuum condition develops in the intake manifold after the engine is started, and consequently in the port, the spring urges the diaphragm to the port closing position to thereby shut off the flow of the fuel to the engine.