(57) A device (1) for fixing the seat assembly of a toilet bowl, comprising a post element
(2) which has a stem (4) which is suitable to engage a hole (5) of a bowl, the post
element being in turn engageable with seat assembly supporting means. The device comprises
an oscillating element (8, 108, 208, 308, 408, 508) which is associated with the stem
(4) and has at least two active positions: an insertion position, in which the oscillating
element and the stem can be inserted in the hole, and a locking position, in which
the oscillating element prevents the stem from sliding out of the hole.
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