US 2005/0089408 A1 · Fluid ejector pumps

Abstract

A fluid ejector pump is characterized by a longitudinally extending flow passage with a fluid inlet end and a fluid outlet end. The fluid inlet end includes a Venturi tube inlet having a relatively larger diameter entry opening for being supplied with pressurized fluid and a relatively smaller diameter exit opening within the flow passage. An air inlet communicates with the flow passage adjacent the exit opening for the intake of air into the fluid exiting the Venturi tube inlet. A shaped deflector is located in the flow passage upstream of the exit opening, with the flow passage defining an annular gap around and along the deflector. An upstream end of the deflector has an upward angle causing acceleration of the fluid flowing upstream in the flow passage. A hi-low mixing effect is produced in the flow passage for greater mixing and turbulence of the fluid while vacuum or suction at the suction inlet is increased.

Claims20

Dependent claims

A fluid ejector pump comprising

an elongate body defining a longitudinally extending flow passage having a central longitudinal axis, an open inlet end and an open outlet end upstream of said inlet end;
a Venturi tube inlet at said inlet end coaxial with said central longitudinal axis and including an entry opening for being supplied with a source of pressurized fluid and an exit opening upstream in said flow passage, said entry opening having a first diameter, said exit opening having a second diameter smaller than said first diameter;
a suction inlet in said body comprising an air entry port in communication with said flow passage adjacent said exit opening;
and
a shaped deflector in said flow passage coaxial with said central longitudinal axis and having a downstream end of partial spherical configuration spaced longitudinally in an upstream direction from said exit opening, an intermediate section of cylindrical configuration extending in the upstream direction from said downstream end, and an upstream section of frustoconical configuration extending angularly outwardly in the upstream direction from said intermediate section, said deflector being axially aligned with said entry opening and said exit opening of said Venturi tube inlet, and said flow passage defining an annular space along said deflector between said deflector and said body.

2 more elements

A fluid ejector pump comprising

an elongate body defining a longitudinally extending flow passage entirely therethrough having a central longitudinal axis, an open downstream end and an open upstream end;
a Venturi tube inlet at said downstream end coaxial with said central longitudinal axis and defining a flow channel entirely therethrough, said Venturi tube inlet including an entry opening for being supplied with a source of pressurized fluid, said Venturi tube inlet extending from said entry opening to terminate at an exit opening upstream in said flow passage, said entry opening having a first diameter and said exit opening having a second diameter smaller than said first diameter, said flow channel including a downstream portion extending from said entry opening to an intermediate portion and an upstream portion extending from said intermediate portion to said exit opening, said downstream portion being uniformly of said first diameter, said upstream portion being uniformly of said second diameter and said intermediate portion being continuously tapering in diameter from said first diameter to said second diameter, said intermediate portion having a length and said upstream portion having a length less than said length of said intermediate portion;
a suction inlet in said body comprising at least one air entry port in communication with said flow passage adjacent said exit opening, said at least one air entry port being aligned with said exit opening in a direction perpendicular to said central longitudinal axis;
and
a shaped deflector in said flow passage coaxial with said central longitudinal axis and having a downstream end of partial spherical configuration spaced longitudinally in an upstream direction from said exit opening, an intermediate section of cylindrical configuration extending angularly outwardly in the upstream direction from said downstream end, and an upstream section of frustoconical configuration extending in the upstream direction from said intermediate section, said deflector being axially aligned with said entry opening and said exit opening of said Venturi tube inlet, and said flow passage defining an annular space along said deflector between said deflector and said body.

2 more elements

A fluid ejector pump comprising

an elongate body defining a longitudinally extending flow passage entirely therethrough having a central longitudinal axis, an open downstream end and an open upstream end;
a Venturi tube inlet at said downstream end coaxial with said central longitudinal axis and defining a flow channel entirely therethrough, said Venturi tube inlet including an entry opening for being supplied with a source of pressurized fluid, said Venturi tube inlet extending from said entry opening to terminate at an exit opening upstream in said flow passage, said entry opening having a first diameter and said exit opening having a second diameter smaller than said first diameter, said flow channel including a downstream portion extending from said entry opening to an intermediate portion and an upstream portion extending from said intermediate portion to said exit opening, said downstream portion being uniformly of said first diameter, said upstream portion being uniformly of said second diameter and said intermediate portion being continuously tapering in diameter from said first diameter to said second diameter;
a suction inlet in said body comprising at least one air entry port in communication with said flow passage adjacent said exit opening, said air entry port being aligned with said exit opening in a direction perpendicular to said central longitudinal axis, said flow passage being uniformly of said first diameter from said suction inlet to said upstream end;
and
a shaped deflector in said flow passage coaxial with said central longitudinal axis and having a downstream end of partial spherical configuration spaced longitudinally in an upstream direction from said exit opening, an intermediate section of cylindrical configuration extending in the upstream direction from said downstream end of said deflector, and an upstream section of frustoconical configuration extending angularly outwardly in the upstream direction from said intermediate section, said deflector being axially aligned with said entry opening and said exit opening of said Venturi tube inlet, and said flow passage defining an annular space along said deflector between said deflector and said body.

2 more elements

Dependencies are inferred from the claim text.

Fluid ejector pumps

Life of this patent

Fluid ejector pumps

Life of this patent

Abstract

Claims20