The present invention is to provide one-way valve of a sealed bag to expel the dead air out from the bag with a preferred air-tight effect. The one-way valve comprises a valve seat, a diaphragm mounted inside the valve seat, the diaphragm is also in linear contact with a projected annular ring, a stop device pressed on the diaphragm, a valve cap screwed to the valve seat and pressed the stop device. Said valve cap has hooks adapted to apertures of the seat, thus keep the cap on the seat not to be separated from thereof. Moving upward or downward the valve cap, the stop device can be controlled to press onto the diaphragm tightly or become loose. An airtight effect is achieved with a pressure exerted between the stop device and the annular ring. Or one-way valve can expel the dead air through the air pores under diaphragm.
1. One-way valve of a sealed bag comprising: a valve seat ( 1 ) having a valve trough ( 12 ) with an opening at a first end, a plate ( 11 ) extends radially outwardly from the valve trough ( 12 ) combined to the sealed bag, a base formed at a second end has a central alignment hole ( 13 ), which is surrounded by a first plurality of air pores ( 14 ), further the first plurality of air pores are circumscribed by a projected annular ring ( 17 ), outer threads ( 18 ) formed around a circumference surface of the valve trough ( 12 ) above the plate ( 11 ), a stop ring ( 19 ) on top of the outer threads ( 18 ) has an outer diameter larger than the outer threads ( 18 ) with several apertures ( 191 ) formed equidistantly along a circumference of the stop ring ( 19 ); a diaphragm ( 2 ), which is a flexible film mounted inside the valve trough ( 12 ) with a bolt ( 21 ) embedded into the central alignment hole ( 13 ) of the base of valve trough; a stop device ( 5 ) having a first end props up a valve cap ( 4 ), a second end resists against the diaphragm ( 2 ), the stop device ( 5 ) is further corresponding to the projected annular ring ( 17 ) of the base of the valve trough ( 12 ); the stop device ( 5 ) is a transparent compressed seat having a truncated pipe ( 50 ), an outer diameter of the pipe is smaller than an inner diameter of the valve trough ( 12 ), an annular lip ( 51 ) is extended radially outwardly along a rim of a top opening of the pipe ( 50 ), a crossed and enforced rib ( 53 ) formed inside a bottom opening, a plurality of hollowed troughs ( 52 ) are arranged around a circumference of the truncated pipe ( 50 ); the valve cap ( 4 ) screwed to the outer thread ( 18 ) of the valve seat ( 1 ), a second plurality of air pores ( 41 ) formed through a top of the valve cap ( 4 ), several hooks ( 42 ) radially inwardly formed along a bottom rim of the valve cap ( 4 ), the hooks ( 42 ) are corresponding to and glided into the apertures ( 191 ) of the stop ring ( 19 ), and then screwed to the outer threads ( 18 ) of the valve seat ( 1 ); two different colored signs ( 192 , 193 ) marked on a top of the stop ring ( 19 ) of the valve seat ( 1 ), a top of the valve cap ( 4 ) has a through hole ( 44 ) corresponding to the different two signs ( 192 , 193 ).
2. One-way valve as claim 1 claimed wherein a valve trough ( 12 ) of the valve seat ( 1 ) and the plate ( 11 ) has an underside with a plurality of air deflectors ( 15 ) formed around the alignment hole ( 13 ) distributed in radial symmetry.
3. One-way valve as claim 2 claimed wherein a projected annular ring ( 16 ) is formed below the alignment hole ( 13 ) connected to the air deflectors ( 15 ), the height of the annular ring ( 16 ) is lower than the air deflectors ( 15 ).
4. One-way valve as claim 1 claimed wherein a projected annular ring ( 22 ) is formed on top of the diaphragm ( 2 ) in an annular form for the stop device ( 5 ) to fit over.
5. One-way valve as claim 1 claimed wherein a projected annular ring ( 43 ) formed underneath the cap ( 4 ) for the stop device ( 5 ) to fit over.
6. One-way valve as claim 1 claimed wherein the hooks ( 42 ) have inner threads formed radially inwardly, the inner threads can be applied to screw to the outer threads ( 18 ) of the valve trough ( 12 ), a radial depth of the inner threads is deeper than the depth of the apertures ( 191 ).