One-way valve assembly

A one-way valve assembly, comprising:

• a central member having a first bottom portion, wherein a first sidewall is formed on the periphery of the first bottom portion extending in a side of an axial direction thereof, and a first inner compartment is formed by the first sidewall together with the first bottom portion;
• wherein at least one first through hole is disposed through the first bottom portion;
• a valve seat having a second bottom portion, wherein a second sidewall is formed on the periphery of the second bottom portion extending in a side of an axial direction thereof, and a second inner compartment is formed by the second sidewall together with the second bottom portion;
• wherein at least one second through hole is disposed through the second bottom portion;
• wherein a plurality of recesses is formed on a surface, which is facing the second inner compartment, of the second bottom portion, so the second through hole is spaced apart from the surface of the second bottom portion with a distance;
• wherein the valve seat is seated in the first compartment of the central member;
• a valve plate having an outer diameter smaller than an inner diameter of the second inner compartment of the valve seat while larger than an inner diameter of the second through hole, and having a thickness smaller than a depth of the second inner compartment;
• wherein the valve plate is seated in the second compartment of the valve seat;
• and
• a plug member having a third through hole, wherein the plug member is seated in the first inner compartment in such way that the valve seat and the valve plate are restricted in the first inner compartment between the first bottom portion and the plug member.