Patent ID: 7988002

Claim:
A leak-resistant plastic container and closure combination comprising: a container comprising: a solid bottom end; an outer sidewall extending from the solid bottom end; a neck portion extending from the outer sidewall to create an open end of the container, the neck portion having a diameter less than a diameter of the outer sidewall; and a flange receptacle including a free end, the flange receptacle extending radially inward from the neck portion to a position below the open end of the container, the flange receptacle being entirely contained within the interior of the container and having an aperture formed therein; and a closure comprising: a sealing portion including an outer portion and an inner portion that form a first receptacle, the outer portion having a diameter greater than the diameter of the neck portion of the container and the inner portion having a diameter less than the diameter of the neck portion of the container; a spring portion including a second receptacle, the spring portion extending inward from the sealing portion; and a flexible planar center area in the center of the closure and extending inward from the spring portion, and configured to act as a diaphragm to accommodate pressure changes; wherein the neck portion of the container includes threads, the outer portion of the closure includes thread receptacles, and the closure is configured to be threaded onto the container, over the open end, using the threads and thread receptacles, to create a primary seal and a secondary seal, the threads and thread receptacles creating the secondary seal; and wherein when the closure is secured to the container, the spring portion exerts a sealing pressure against an interior side of the neck portion of the container to create the primary seal, the second receptacle faces toward the solid bottom end of the container, and the neck portion of the container is disposed within the first receptacle of the sealing portion of the closure.