Umbrella check valve assembly having retention plate

A check valve assembly comprising:

• a first port fitting having a passage extending therethrough;
• a second port fitting having a passage extending therethrough;
• a base comprising a seat having a central mounting hole passing therethrough and one or more flow channels passing therethrough, the base being disposed between the first port fitting and the second port fitting so that fluid flowing from the second port fitting to the first port fitting must pass through the one or more flow channels of the seat;
• an umbrella valve comprising a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface of the sealing disk and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat of the base so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels;
• and
• a retention plate disposed between first port fitting and the seat so that the retention plate sits against or adjacent to the outer surface of the sealing disk, the retention plate terminating at an outer perimeter edge, a gap being formed between the outer perimeter edge and the first port fitting so that fluid flowing from the second port fitting to the first port fitting can pass through the gap, the retention plate comprising a plate body having a first side and an opposing second side with a central axis passing therebetween, one or more flow paths passing through the plate body between the opposing sides through which fluid can pass, the one or more flow paths being completely encircled by the retention plate and spaced apart from the gap and the central axis.

A check valve assembly comprising:

• a first port fitting having a passage extending therethrough;
• a second port fitting having a passage extending therethrough;
• a base having a seat with a central mounting hole passing therethrough and one or more flow channels passing therethrough, the base being disposed between the first port fitting and the second port fitting so that fluid flowing from the second port fitting to the first port fitting must pass through the one or more flow channels of the seat;
• an umbrella valve comprising a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface of the sealing disk and projecting into the mounting hole of the base, the umbrella valve having a blind hole extending from the outer surface of the sealing disk and into the mounting stem, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat of the base so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels;
• and
• a retention plate comprising a plate body having a first side and an opposing second side.

A check valve assembly comprising:

• a base comprising an annular sleeve encircling a seat, the seat having a central mounting hole passing therethrough and one or more flow channels passing therethrough;
• a first port fitting having a first tubular stem bounding a passage extending between a first end and an opposing second end, a first annular flange outwardly projecting from the second end of the first tubular stem and being secured to a first end of the annular sleeve of the base;
• a second port fitting having a second tubular stem bounding a passage extending between a first end and an opposing second end, a second annular flange outwardly projecting from the second end of the second tubular stem and being secured to a second end of the annular sleeve of the base so that the second port fitting is spaced apart from the first port fitting, the first tubular stem of the first port fitting having a different configuration than the second tubular stem of the second port fitting;
• an umbrella valve comprising a flexible sealing disk having an outer surface and an opposing inner surface, a mounting stem extending from the inner surface of the sealing disk and projecting into the mounting hole of the base, the sealing disk being movable between a first position wherein at least a portion of the sealing disk sits on the seat of the base so as to cover the one or more flow channels and a second position wherein the sealing disk is resiliently flexed so as to at least partially uncover the one or more flow channels;
• and
• a retention plate disposed between first port fitting and the seat of the base so that the retention plate sits against or adjacent to the outer surface of the sealing disk.