Patent ID: 9364107
Filing Date: 2016-06-14
CPC Classification: A47G,B65D

Claim Text:
1. A liquid container comprising a cup including a brim, a floor, and a side wall extending from the brim toward the floor, the side wall including a frustoconical inner surface cooperating with the floor to form an interior liquid reservoir chamber of the cup, the brim including a curved outer boundary surface mating with an uppermost portion of the frustoconical inner surface of the side wall and extending away from the uppermost portion, the curved outer boundary surface of the brim having a rounded shape in vertical cross section that extends along a generally circular path and subtends an angle of at least 180° , the curved outer boundary surface of the brim having an annular inner sealing portion adjacent to the frustoconical inner surface of the side wall, an annular outer sealing portion away from the inner sealing portion, and an annular middle sealing portion interposed between the annular inner and outer sealing portions, and a lid including a central closure and a brim mount coupled to the central closure and mounted on the curved outer boundary surface of the brim to retain the central closure in a position closing a mouth opening into the interior liquid reservoir chamber in the cup, the brim mount including a first seal ring with a first sloped inner surface which engages the uppermost portion of the frustoconical inner surface of the side wall to establish a first annular liquid flow barrier between the lid and the cup, a second seal ring with a second sloped inner surface which engages the annular inner sealing portion of the curved outer boundary surface of the brim to establish a second annular liquid flow barrier between the lid and the cup, a third seal ring with a third sloped inner surface which engages the annular middle sealing portion of the curved outer boundary surface of the brim to establish a third annular liquid flow barrier between the lid and the cup, and a fourth seal ring with a fourth sloped inner surface which engages the annular outer sealing portion of the curved outer boundary surface of the brim to establish a fourth annular liquid flow barrier between the lid and the cup; wherein each of the first, second, third, and fourth sloped inner surfaces are defined relative to a horizontal axis up; wherein the first sloped inner surface that mates with the companion surface of the cup has a greater slope than the second sloped inner surface that mates with the companion surface of the cup; wherein the second sloped inner surface has a greater slope than the fourth sloped inner surface; wherein each of the first, second, and third seal rings has a frustoconical shape and the fourth seal ring has a curved shape.