초록 ▼

A drinking cup has a cover which is formed with a drinking spout at one side and a vent at the other. Elements extend down from under the spout and the vent. A flow control element is provided and made of elastomeric material having a pair of spaced cavities on one side, each cavity having a floor a

A drinking cup has a cover which is formed with a drinking spout at one side and a vent at the other. Elements extend down from under the spout and the vent. A flow control element is provided and made of elastomeric material having a pair of spaced cavities on one side, each cavity having a floor at the bottom thereof. The cavities receive in frictional engagement respectively the lower ends of the elements. This engagement supports the flow control element with the floor of each cavity in sealed relation to its element. Each floor has a passage which is normally closed but opens on the occurrence of a pressure differential on opposite sides of the floor.

대표청구항 ▼

[ What I claim is:] [22.] A drinking cup comprising:a container having a removable cover, said cover having a drinking spout, a vent, and a pair of downwardly depending spaced elements, one of said pair of spaced elements communicating with said spout and the other of said pair of spaced elements co

[ What I claim is:] [22.] A drinking cup comprising:a container having a removable cover, said cover having a drinking spout, a vent, and a pair of downwardly depending spaced elements, one of said pair of spaced elements communicating with said spout and the other of said pair of spaced elements communicating with said vent; anda flow control element comprising a pair of spaced cavities, each of said pair of cavities having a wall and a flexible membrane in communication with said wall, said wall of each of said pair of cavities being frictionally engaged with one of said pair of spaced elements to support said flow control element and seal said cavities to said spaced elements so that said flexible membranes are positioned respectively between said drinking spout and vent of said cover and the interior of said container, each of said membranes having a passage therethrough that is normally closed but opens upon occurrence of a pressure differential on opposite sides of said membrane..Iaddend..Iadd.