Patent ID: 7913328

Claim:
A toilet, comprising: a tank having an outlet valve, the outlet valve having an extension projecting through a lower wall of the tank; a bowl having an upper rearward portion with an inlet suitable for receiving water from the tank through the portion; wherein the extension has mounted thereon: a nut; and a gasket positioned radially outward of the nut, the gasket having a downwardly and radially inwardly curved convex sealing surface disposed at a lower radially outward edge of the gasket; and wherein the bowl inlet has an inwardly directed entry surface upon which the gasket curved convex sealing surface abuts and seals; whereby the bowl and gasket form an essentially ball and socket type joint so that the tank can be tilted relative to the bowl rearward portion forward-to-back and/or side-to-side, while maintaining a sealing relationship between the gasket and bowl; wherein the bowl inlet inwardly directed entry surface is inwardly dished such that the joint comprises abutment of the radially inwardly curved convex sealing surface against said inwardly dished entry surface; whereby the convex sealing surface is designed to mate with the inwardly dished entry surface .