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AssigneeNepon Kabushiki Kaisha (Nepon Inc.)
InventorsMasami Miya, Masao Nagasaki, Shuichi Harada
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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. The lower membrane is closed during the use by rotating the central flange to appropriate angular position so as to temporarily hold the faeces thereon while bad odor from the reservoir is prevented from rising therethrough. After use, the central flange is rotated so as to open the lower cylindrical membrane for discharging the faeces thereon into the reservoir while the upper cylindrical membrane is closed to prevent bad odor from rising into the lavatory room and prevent the faeces to be viewed by the user. After discharge of the faeces into the reservoir, the lower cylindrical membrane is closed by rotating the central flange to be ready for the next use. Various mechanisms for rotating the central flange is provided for facilitating the opening and closing of the cylindrical membranes.
Apparatus for deodorizing a lavatory of the type including a lavatory bowl having an outlet port which communicates with excrement reservoir comprising a valve including first and second coaxial cylindrical membranes having equal inner diameters and equal lengths, each of said membranes having respective corresponding first and second opposite ends, a first flange secured to said first end of said first membrane, a third flange secured to said second end of said second membrane, a second flange commonly secured to said second end of said first membrane and said first end of said second membrane, said first and second membranes being reciprocably angularly displaceable about their common longitudinal axis by 180.degree. relative to each other without elastically deforming either of said membranes, and a first sleeve having first and second opposite ends, said opposite ends of said first sleeve having respective first and second registerable apertures therein, said valve being mounted in said first sleeve, said first flange and said third flange of said valve respectively underlying and overlying said apertures in said first sleeve so as to permit said valve to isolate an odorous material from said first membrane of said valve.
Dependencies are inferred from the claim text.