Bypass check valve and Venturi having same

A check valve unit comprising:

• a housing defining an inlet port, an outlet port, and an internal chamber in fluid communication with the inlet port and the outlet port thereby defining a flow path from the inlet port through the internal chamber to the outlet port,
• wherein the internal cavity has a first seat defining a closed position and a second seat defining an open position, the second seat comprising a plurality of fingers circumferentially spaced apart about the outlet port and projecting into the internal chamber;
• wherein the second seat has a middle axis transverse to a plane of a longitudinal cross-section of the housing and has a shortest finger positioned to either the left or to the right of the middle axis;
• and
• a check valve disc within the internal cavity that translates between a flat sealing state in the closed position, and an angled state, relative to the middle axis, or a deflected state against the plurality of fingers in the open position, thereby defining a longer distance of travel to reach the closed position for a portion of the check valve disc that is associated with the position of the shortest finger relative to other portions of the check valve disc.

A housing unit of a Venturi device comprising:

• a body defining a passageway having a central longitudinal axis and defining a port in fluid communication with the passageway;
• wherein the passageway has a first end defining a discharge exit and a second end defining a first canister portion in which a sound attenuating member is seatable;
• and
• wherein the exterior of the body comprises a plurality of fingers circumferentially spaced apart about the port that project away from the passageway;
• wherein the plurality of fingers has opposing middle fingers of greatest height positioned at a middle axis transverse to a plane of a longitudinal cross-section of the body and has a shortest finger positioned to either the left or to the right of the middle axis.