Abstract: A protective casing (33) for the end yoke (31) of a transmission shaft with locking pin (29) and a rotating sleeve (39) for unlocking the aforementioned pin (29), is characterized in that it includes an external sleeve (45) that does not rotate with the aforementioned yoke, covers the rotating sleeve (39), and includes a mechanism (65 and 67) designed to operate the aforementioned rotating sleeve (39). The locking pin (29) can easily be released from the exterior, and the protective casing remains stationary while the yoke is rotating.

Abstract: A mechanical drive box (8) comprising at least a shaft (1; 3) and at least a drive member (10) on the shaft and for the transmission of the motion between the shaft and the drive member, a device for the transmission of motion comprising: a set of pawls (26) radially movable within seats (16) formed in the shaft (1), said pawls having internal and external ends (26A) shaped in radial and/or axial direction; inside said drive member, a housing (20) wherein a drive member is received having a shaped surface for cooperating with the external ends of said pawls; inside the shaft, an axial cavity (14) for housing a shaped core (30) axially movable for the operation, with elastic means (36) for reacting to the axial movement of said core; and on said core, shapings and inclined surfaces (40, 42) able to cooperate with the internal shaped ends of the pawls; the axial position of said core and/or the force of the elastic means acting on the core determine the radial position of said pawls and/or their resistance agai

Abstract: The accident prevention guard is intended for homokinetic--as well as wide-angle--joints which have an end fork, an inner fork and a central body. The guard is made up of a shell structure for the protection of the central body, held through two annular supports by the central body and able to freely rotate with respect thereto. It is completed with an end cone for the shaft guard, suitable for completing the overlap on the side of the inner fork. The shell structure is made up of two parts, matched to each other along a plane transverse to the axis of the central body; each of the parts is made to rest on and engage with the body of the homokinetic wide-angle joint so as to maintain--as sole freedom degree--the rotation about the axis of the same body.

Abstract: Device for maneuvering a fast connection tangential button operated in the tranmissions having splined profile clutches or joints, comprising an annular member encircling the body of the joint and having an internal profile making up a thrust surface able to act on the button as a consequence of an angular displacement of the annular member around the joint body; the reaction spring acting on the button angularly urges said annular member in a direction opposite to that causing the release action upon the button.

Abstract: A protection device for the outer fork or bifurcated part of a universal joint at the coupling end of a Cardan shaft. A ring in at least two parts is arranged to be assembled on an annular support and seatings provided on the fork. A protection sleeve is mounted on the assembled ring in order to keep it in assembled condition and to be supported by it. Resilient tongues on the ring engage in slots in the protection sleeve in order to retain the sleeve on the ring.

Abstract: A guard for telescopic cardan shafts, especially for agricultural machinery, comprises an open ring nut supported by an annular throat of a collar near a universal joint of the cardan shaft. Each annular sheath of a telescopic part of the guard engages into a seat formed by projections of the nut. Some of the projections have click detents which go into slots of the sheath releasing it. On the ring nut an inner funnel is mounted, inside the plane seats of which, resilient tongues of the ring nut release themselves performing a clamping function for the ring nut. An additional band springs into engagement on an annular zone of the inner funnel thus extending the latter. The additional band can move at an angle to the inner funnel from a position where holes of the band are lined up with holes of the funnel for access, to another position where the holes are offset to prevent access.