Inlet valve mechanism for a toilet tank

An inlet valve mechanism for a toilet tank comprising

• a housing, said housing including upper and lower walls and a side wall, said lower wall comprising a disk, said disk including a circumference, an axially located aperture, a top surface and a bottom surface,
• an annular collar, the circumference of said disk being connected to an intermediate portion of said annular collar to define upper and lower portions of said annular collar, said side wall being connected to said upper portion of said annular collar,
• a first raised annular wall supported on said top surface in radially outwardly spaced relation to said aperture, said raised annular wall and the portion of said top surface bounded thereby defining a recess,
• a valve seat, said valve seat including a central opening and being supported by said lower wall within said recess with said central opening lying along said axis and being in alignment with said aperture, said valve seat comprising an annulus with a tapered inner wall that defines said central opening,
• a valve body, said valve body being supported in said housing for reciprocal movement along said axis between a first position where a portion of it engages and closes said central opening and a second position where it disengages and opens said central opening,
• said portion of said valve body being tapered, and
• the taper of said inner wall and the taper of said portion of said valve body are substantially the same so that they can come into close fitting engagement to close said central opening.