Evacuation actuating closure for a container

An evacuation actuating closure for a container which includes a container body with an annular upper wall which defines a longitudinal direction and an upper opening therein to permit access to the interior of the container body, said evacuation actuating closure comprising:

• a lower cap member including:
• a valve seat plate adapted to be disposed transverse to the annular upper wall, said valve seat plate defining a central area with a plurality of valve seats which are angularly and circumferentially disposed therein and which define a plurality of venting holes that form a circumferential venting portion, and an intermediate annular seat wall disposed upwardly and transversely to said valve seat plate and confining said circumferential venting portion;
• and
• an annular guiding wall formed with a periphery of said valve seat plate and adapted to extend in the longitudinal direction so as to form upper and lower annular portions disposed respectively above and below the periphery of said valve seat plate, said lower annular portion being adapted to extend outwardly of and sealingly engage with the annular upper wall;
• an elastomeric disc member including an elastomeric central portion fixedly secured on said central area, and a peripheral brim portion disposed to abut resiliently against said intermediate annular seat wall to block said venting holes, said peripheral brim portion yielding from abutment against said intermediate annular seat wall only when the pressure below said venting holes is higher than that above said venting holes;
• an upper cap member including a transverse depressing portion disposed over and spaced apart from said valve seat plate, and an annular skirt portion extending downwardly from a periphery of said transverse depressing portion and having an inner annular wall which is sleeved on and which is slidably retained on said annular guiding wall in the longitudinal direction so as to confine an air transit chamber between said transverse depressing portion and said valve seat plate;
• and
• a ring-shaped check valve member made of an elastomeric material and disposed between said inner annular wall and said annular guiding wall such that said check valve member will permit fluid communication of said air transit chamber with the atmosphere only when said transverse depressing portion is depressed downwardly toward said valve seat plate.