Abstract:
A safety support designed to be inserted by a translation operation around a rim bearing in which the radially inner surface of the base of the support contains a plurality of protuberances radially arranged internally.
Abstract:
Wheel rim comprising two rim seats having different diameters, inclined outwards and extended axially outwards by two humps of small height, the rim seat of smaller diameter being connected axially on the inside to a bearing surface via a truncated conical portion and the rim seat of larger diameter being connected axially on the inside to the said bearing surface by a rib of small or zero height, whose axially interior wall has a generatrix that makes with the rotation axis an angle open radially and axially outwards and at the most equal to 30null, characterised in that the said rib, which has an axially inside wall of axial width at most equal to the axial width of the said second seat is provided circumferentially with at least two transverse grooves of small size.
Abstract:
An assembly including a deformable, inextensible tread-bearing support S, which can be slipped on to a suitable rim bearing surface (11). The bearing surface (11) extends axially towards the inside of a first rim seat (13null), which is in turn extended to the outside by a protrusion or hump (15null) of low height. The first rim seat (13null) is inclined towards the outside. A second rim seat (13null) having, viewed in meridian section, a generatrix, the axially inner end of which is located on a circle of diameter DnullA greater than the diameter of the circle on which is located the axially inner end DnullA of the first rim seat (13null). The two seats being, axially to the inside, extended by frustoconical portions (17, 14) of a height at least equal to 0.01 times the minimum diameter of the bearing surface (11), and the generatrices of which form with the axis of rotation angles null at least equal to 45null. The rim bearing surface (11) is provided with at least one circumferential protuberance (115) arranged in a circumferential groove (30) of the radially inner face of the tread bearing support S, such that the protuberance (115) axially comes to bear and butt up against at least one lateral wall of the groove (30).