Abstract: A braking device which can be interposed between mutually rotatable elements and comprises a first body, which rotates rigidly with a first element, and a second body, which rotates rigidly with a second element and can engage rotatably the first body, the device further comprising means for translational motion in order to impart a translational motion of the second body with respect to the first body upon mutual rotation, elastically deformable means being provided which interact between the first body and the second body in order to contrast the translational motion upon mutual rotation between the bodies, at least in one preset direction.

Abstract: A quick coupling device, particularly for connecting a seat assembly to a toilet bowl, comprising a post which can be fixed to a toilet bowl. On the post there is provided an open socket for inserting therein, and extracting therefrom, at least one pivot for the connection of a seat assembly. The socket forms an engagement portion which can be detachably engaged by a mating portion of the connection pivot for the removable retention of the connection pivot in the socket.

Abstract: A quick-coupling device, for applying a cover to a water closet, including: pin elements which are fixable to the water closet; shaped heads each provided at an end of a body part of each one of the pin elements; a cross-member having a linear longitudinal extension for joining a seat and a lid of the cover; seats mutually distally arranged on the cross-member and having a shape adapted to be engageable by the shaped heads of each of the pin elements; and a locking device for detachably locking the shaped heads of the pin elements in the seats.