An aspirator for an inflatable assembly may comprise a housing and an inlet flap biased away from an interior of the housing. A pressure relief flap may be biased toward the interior of the housing. A manifold may be located in the interior of the housing and configured to output a primary gas flow toward an outlet of the housing. A nozzle may be fluidly coupled to the manifold. The nozzle may be configured to output the primary gas flow to the manifold.

The present invention relates to an impeller (102) for a tangential fan (100) intended to be fitted to a motor vehicle, the impeller extending chiefly in the direction of a longitudinal axis (L102) of the impeller (102), the impeller (102) having a plurality of blades (110) distributed in stages (112; 112.sub.1; 112.sub.2) along said longitudinal axis (L102) of the impeller (102), each stage (112; 112.sub.1; 112.sub.2) comprising a plurality of blades (110) angularly distributed about said longitudinal axis (L102) of the impeller (102), the blades (110) of each stage (112; 112.sub.1; 112.sub.2) of blades (110) preferably being equally angularly distributed about said longitudinal axis (L102) of the impeller (102), in which impeller the blades (110) of a first stage (112.sub.1) of blades (110) are angularly offset from the blades (110) of at least a second stage (112.sub.2) of blades (110).

A Venturi type ejector having a feed duct for feeding fluid under pressure with the duct extending along a central axis. A first expansion chamber is connected to the feed duct; a first mixing chamber is connected to the expansion chamber; a first suction chamber is connected to the mixing chamber; and an exhaust chamber is connected to the first mixing chamber. The ejector where the fluid under pressure penetrates into the first expansion chamber along a plurality of directions extends in a plane that is substantially orthogonal to the central axis. A vacuum generator includes such an ejector.

A jet pump comprising a pump housing containing a jet nozzle and a throat diffuser nozzle. The jet nozzle is comprised of a jet nozzle insert disposed in an axial inner bore of a precision jet cylindrical body and formed of an ultra-hard material. The throat diffuser nozzle is comprised of a throat diffuser nozzle insert disposed in an axial inner bore of a precision throat diffuser cylindrical body and also formed of an ultra-hard material. The jet nozzle and throat diffuser nozzle are disposed in an elongated cylindrical central bore portion of a tubular side wall of the pump housing. In order to achieve highest concentricity of the axial inner bores, the axial inner bore of the jet nozzle insert and the axial inner bore of the throat diffuser nozzle insert are formed after placement in the precision cylindrical bodies.

The invention relates to an ejector arrangement (1, 40) comprising a housing (11) and at least two ejectors (2, 3, 41, 42) arranged in said housing (11) along a common axis (13). Each ejector (2, 3, 41, 42) has a motive inlet (4, 5), a suction inlet (6, 7), an outlet (8, 9) and a valve element (23, 24, 43, 44). The task of the invention is to provide an ejector arrangement that allows for a good control of the mass flow of fluid through the ejector arrangement while keeping the construction simple. According to the invention the above task is solved in that the ejector arrangement (1, 40) comprises a common actuator (25, 55), that is arranged to engage at least two of the valve elements (23, 24, 43, 44) to open the motive inlets (4, 5).

An aspirator may comprise an aspirator body defining an air channel, an aspirator inlet disposed in the aspirator body whereby the air channel receives a compressed fluid, a venting aperture disposed in the aspirator body in fluid communication with the air channel, and a venting valve disposed in the venting aperture. The venting valve is in an open position and the venting valve moves to a closed position in response to the compressed fluid being received by the aspirator.

The invention relates to an anode circuit (8) for a fuel cell (3) having at least one gas jet pump (6) for recirculating anode exhaust gas, which has at least one nozzle (18) through which the fuel gas (H 2) may flow as a fuel gas flow, and which has a fuel gas line (14), a recirculation line (7), and an outflow line (15). The anode circuit according to the invention is characterized in that a plurality of nozzles (18) with different geometries are arranged in a nozzle body (16), which is movable relative to the fuel gas line (14) in such a manner that in each case one of the nozzles (18) is selectively usable.

An ejector includes an inner nozzle, an outer nozzle internally provided with the inner nozzle, and an outer injection port between the inner nozzle and the outer nozzle. The ejector is operated to suck a target fluid by negative pressure generated by a working fluid injected from the inside of the inner nozzle or/and the outer injection port, and discharge the target fluid merged with the working fluid. The ejector further includes a nozzle guide placed in the gap between the inner nozzle and the outer nozzle and configured to restrict the interval of the outer injection port.

The invention provides an ejector for generating a vacuum, a drive nozzle for generating a drive jet of air from a compressed air source and directing the drive jet of air into an outlet flow passage at the outlet of a drive stage of the ejector to entrain air in a volume surrounding the jet of air into the jet flow to generate a vacuum across the drive stage. The drive nozzle substantially consists of an inlet flow section and an outlet flow section aligned in a direction of air flow through the nozzle. The outlet flow section diverging in the direction of airflow, from an outlet end of the inlet flow section to an exit of the nozzle, the outlet flow section having a shape which is more divergent near the outlet of the inlet flow section and less divergent near the exit of the nozzle.

A jet pump comprising a pump housing containing a jet nozzle and a throat diffuser nozzle. The jet nozzle is comprised of a jet nozzle insert disposed in an axial inner bore of a precision jet cylindrical body and formed of an ultra-hard material. The throat diffuser nozzle is comprised of a throat diffuser nozzle insert disposed in an axial inner bore of a precision throat diffuser cylindrical body and also formed of an ultra-hard material. The jet nozzle and throat diffuser nozzle are disposed in an elongated cylindrical central bore portion of a tubular side wall of the pump housing. In order to achieve highest concentricity of the axial inner bores, the axial inner bore of the jet nozzle insert and the axial inner bore of the throat diffuser nozzle insert are formed after placement in the precision cylindrical bodies.