Abstract: Transmission linkage (2) for a continuously variable transmission mechanism (1) comprising at least one wheel (3, 4, 5) comprising two rotating flanges (31, 32, 41, 42, 51, 52), said linkage comprising: a first set of first links (210, 210?, 410, 410?, 510, 510?, 700, 800, 900) having bearing surfaces (2106, 2107, 2108, 2109) able to come into contact between two flanges; a second set of second links (212, 412, 512) hinged to one another to form a closed-loop chain, the number of second links being equal to the number of first links; according to the invention, each link of one of the sets comprises a meshing pin (2120, 2120?, 2120?, 4103, 505, 600, 632, 642) and each link of the other set comprises at least one closed reception housing (2110, 2110? 415, 515, 615, 621, 631, 641, 651) comprising meshing walls (2111, 624) engaging with said meshing pin via a meshing connection, said meshing connection allowing each first link to move with respect to the second link with which it collaborates, at least in a long

Abstract: Self-locking lock-up means (20, 21) for a transmission mechanism (1) comprising at least one wheel and a transmission linkage collaborating with said wheel, the lock-up means comprises at least one lock-up support (22) exhibiting at least one first bearing surface and at least one wedging element (201, 211) comprising:—a second bearing surface collaborating with the first bearing surface,—a lock-up surface (213, 203) able to collaborate temporarily with a driving surface opposite, the wedging element being able to move in a direction of insertion along the first bearing surface between a minimum position in which the lock-up surface is furthest away from the drive surface opposite and a nominal position in which the lock-up surface is in contact with the drive surface.

Abstract: A mechanism for transmitting rotational power comprising: a link extending along a closed loop and continued by a succession of portions each having a longitudinal direction tangent to the closed loop; and temporary unification means comprising a plurality of self-locking means distributed at least along an active portion of a first drive circle, and comprising at least one rigid locking element simultaneously pressing against a first support surface of the first rotating element and a second support surface of a link portion facing the locking element. The first and second support surfaces are arranged so that one locking element of the first drive circle active portion is jammed between the support surfaces and is capable of self-unlocking when the corresponding self-locking means leaves the active portion. One of the support surfaces is a tangential gripping surface that is parallel to the longitudinal direction of the link portion against which the locking element presses.

Abstract: A mechanism for transmitting rotational power comprising: a link extending along a closed loop and continued by a succession of portions each having a longitudinal direction tangent to the closed loop; and temporary unification means comprising a plurality of self-locking means distributed at least along an active portion of a first drive circle, and comprising at least one rigid locking element simultaneously pressing against a first support surface of the first rotating element and a second support surface of a link portion facing the locking element. The first and second support surfaces are arranged so that one locking element of the first drive circle active portion is jammed between the support surfaces and is capable of self-unlocking when the corresponding self-locking means leaves the active portion. One of the support surfaces is a tangential gripping surface that is parallel to the longitudinal direction of the link portion against which the locking element presses.