Vacuum producing device having a suction passageway and a discharge passageway entering through the same wall

A device for producing vacuum using the Venturi effect comprising:

• a housing defining a suction chamber, a motive passageway having a main passageway and a continuously tapering section converging toward the suction chamber along a length from the main passageway to a motive exit and in fluid communication with the suction chamber, a discharge passageway diverging away from the suction chamber and in fluid communication with the suction chamber, and a suction passageway in fluid communication with the suction chamber;
• wherein, within the suction chamber, the motive exit of the motive passageway is aligned with and spaced apart from a discharge entrance of the discharge passageway to define a Venturi gap;
• wherein the discharge entrance is in a first wall of the suction chamber and a suction entrance of the suction passageway is in the first wall of suction chamber at a position that generates a 180 degree change in the direction of suction flow from the suction passageway to the discharge passageway.