Abstract: A method and apparatus for continuously defecating a urinal by means of foam provided on the inside face thereof is provided. Urine odor is sealed in the urinal and hygienically removed immediately after urination and transferred out of the urinal. The urine is sealed and lubricated by the foam, without the need for a large quantity of water.The urinal is provided with a casing including a foaming tank provided with an air stone and an air delivery pipe therefor, a foam supply pipe connected with the urinal and a water replenishing tank for controlling the level of water within the casing.

Abstract: The apparatus comprises a throttle valve comprising an upper cylindrical resilient deformable membrane having an upper flange at the upper end thereof and a lower cylindrical resilient deformable membrane having a lower flange at the lower end thereof and connected at its upper end to the lower end of the upper cylindrical membrane by a central flange. The upper flange is secured to the upper wall portion of the outer wall of the apparatus and the lower flange is secured to the lower wall portion of the outer wall with either one of the upper and lower cylindrical membranes being twisted by 180.degree. about its longitudinal axis so that the twisted membrane is closed. The upper end of the throttle valve is attached to the hole discharge of the lavatory bowl while the lower end is located above the excrement reservoir.