Patent ID: 6928666
Filing Date: 2005-08-16
Classification: E03D

Abstract:
1. A toilet, comprising: a) a bowl having a drain channel that extends from the bowl, the bowl and the drain channel having a water trap, the bowl having an upper rim; b) the upper rim having an upper rim duct that communicates with the bowl by plural openings; c) a water tank located above the bowl, the tank having an aperture that is in communication with the upper rim duct; d) a base member located in the water tank and covering the aperture, the base member comprising a flapper valve passage and a vent pipe passage, the flapper valve passage is normally covered by a flapper valve that when opened, permits flushing of the bowl through the aperture, the upper rim duct and the openings, the diameter of the vent pipe passage in the base member is 70% of the diameter of the aperture and the diameter of the flapper valve passage in the base member is 70% of the diameter of the aperture, the vent pipe inside diameter is as large as the inside diameter of the vent pipe passage of the base member; e) a vent pipe extending from and communicating with the vent pipe passage of the base member, out of the water tank, to a location of the drain channel that is downstream of the water trap; f) a fan in-line with the vent pipe; g) the upper rim duct being the only channel for conveying water from the water tank to the bowl, with some of the openings in the upper rim duct being larger than the other openings, the larger openings are located at a front portion of the bowl, with the water tank located adjacent a rear portion of the bowl, the larger openings are at least 15 times larger than the other openings; h) the vent pipe passage and the flapper valve passage both being positioned so as to be partially in line with the aperture, wherein both the vent pipe passage and the flapper valve passage in the base member are unconstricted.