Patent ID: 7475864

Claim:
A deflation valve for a compression bag comprising: a base ( 2 ) having a set of slots ( 24 a ) and serving as a deflation opening of a compression bag (B) after being fixed to a hole provided on the compression bag (B); a cover ( 3 ) attached to the top of the base ( 2 ) by engagement screwed into the slots ( 24 a ); and a valve body ( 4 ) formed separately from the base ( 2 ) and the cover ( 3 ); the base ( 2 ) being formed with a diaphragm ( 21 ) that closes the inside of the compression bag (B) from the outside thereof, the diaphragm ( 21 ) being provided with a deflation hole ( 22 ) that communicates the inside and outside of the compression bag (B); the cover ( 3 ) having a contact portion ( 31 a ) on its upper surface to be contacted with a suction nozzle (N) of vacuum cleaner as a vacuum source, the contact portion ( 31 a ) being provided with a through hole ( 32 ) in the area the suction nozzle (N) contacts and encircles, the through hole leading to the inside of the cover ( 3 ); the valve body ( 4 ) being disposed in a valve housing chamber (S) enclosed by the diaphragm ( 21 ) of the base ( 2 ) and the cover ( 3 ), and being able to close the deflation hole ( 22 ) from the upper side by being drawn toward the hole under negative pressure inside the compression bag (B), the valve body being movable away from the deflation hole ( 22 ) by suction of the vacuum source when the cover ( 3 ) is loosened and moves up, then keeping the deflation hole ( 22 ) sealed when the cover ( 3 ) is tightened and moves down, wherein a set of the slots ( 24 a ) are provided on a sidewall ( 24 ) that is formed in a manner to protrude upward on the base ( 2 ), and a pressing portion ( 33 ) is formed on the underside of the cover ( 3 ) in order to press the valve body ( 4 ) with the engagement of the cover ( 3 ), and the valve housing chamber (S) is defined by the sidewall ( 24 ), the diaphragm ( 21 ), and the lower edge of the pressing portion ( 33 ) of the cover ( 3 ), while the valve body ( 4 ) is neither secured to the base ( 2 ) and the cover ( 3 ) nor pressed by any elastic member, but is disposed inside the valve housing chamber (S) in a free state, whereby the valve body ( 4 ) is movable upward and downward inside the valve housing chamber (S) when the cover ( 3 ) is loosened, and can entirely overlay the deflation hole ( 22 ) despite the horizontal movement of the valve body ( 4 ).