Patent ID: 8016261

Claim:
The safety air valve of a receiving bag comprising: an upper valve body; wherein the upper valve body is installed at the inner side of the receiving bag; a press body; and a first helical thread formed on an upwardly extending portion of the upper valve body closely to the inner side of the receiving bag; wherein the first helical thread defines a passageway extending out of the receiving bag; and a first main air channel is formed at the bottom of the first thread penetrating into the receiving bag so as to form a stepped valve opening on the top of the first main air channel; a valve seat having two sides including an outer side; wherein a second helical thread is formed on the upper valve seat corresponding to the first helical thread of the upper valve body; the second helical thread is screwed on the first thread and is positioned outside of the receiving bag; the second helical thread engages the first helical thread on the upper valve body and corresponds to a first main air channel of the upper valve body; the press body has a second main air channel penetrating through to the outside of the receiving bag; and a sub-air channel is formed at one side of the valve seat so as to interlink the second main air channel; a valve gate; wherein the valve gate is covered between the upper first main air channel and the press body; a plurality of notches are formed around the valve gate so as to circulate air; and the safety air valve is assembled to prevent from over-sucking the air in the receiving bag; and wherein the sub-air channel includes a plurality of gated air channels on the outer side of the valve seat; the second thread has a plurality of radial through holes; and the end of the press body has a plurality of slots.