Abstract: A device for couplng a loader to a tractor, wherein the hitching frame (1) of the loader is provided with two coupling projections (11, 12) or sockets (21, 22) and a latch (14) biased by a spring (15), the coupling head (2) of the tractor is provided with two complementary coupling members and locking means (25, 25?), and said latch (14) engages said locking means (25, 25?) to lock the load onto the tractor. Said device is characterised in that the coupling head (2) includes pre-locking means (24, 24?) engageable by said latch (14) in a pre-locking position in which said projections (11, 12) and sockets (21, 22) are not fully coupled, and the spring (15) continually urges said latch (14) into the locking or pre-locking position.

Abstract: The invention relates to a device for coupling a loader to a tractor, the coupling frame (1) of the loader being provided with two male or female coupling members (11, 12; 21, 22) and with a catch (14) biased by a spring (15), the coupling head (2) of the tractor being provided with two complementary coupling members and with locking means (25, 25?), said catch (14) co-operating with said locking means (25, 25?) to lock the loader on the tractor. The device is remarkable in that the coupling head (2) includes prelocking means (24, 24?) with which said catch (14) can co-operate in order to occupy a prelocking position in which said male and female members (11, 12; 21, 22) are not completely coupled together, the spring (15) tending permanently to hold said catch (14) in the locking or prelocking position.

Abstract: The invention concerns a system wherein the tool-bearing frame (1) and the tool (2) are each equipped with a multiple fluidic connection box, for example hydraulic provided with complementary male-female connecting members: each of said boxes is provided with a mobile and retractable protective cover, which normally covers the connecting members contained in said box. Said covers are arranged such that, in a first phase, the proper positioning of the tool-bearing-frame opposite the tool automatically causes the covers to retract, directly matching the fluidic connection members of the two boxes, so as to enable subsequently, in the second and third phases, the mechanical followed by the fluidic connection of the tool-bearing frame and the tool. The system protects the connecting members from the outside environment, while enabling easy and secure connection of the tool with the tool-bearing frame, without any risk of deterioration of the fluidic connectors.

Abstract: In the device, the male connection members (3) are carried by a plate (11) provided with a pair of identical downwardly-extending side prongs, each of the prongs being provided with a recess (101) having a forwardly-facing shaped edge, whereas the female members (4) are carried by an upwardly open housing (2) in which a locking shaft (5) is mounted to rotate and guided in rotation, the shaft being provided with two cam-forming portions (50), each of which is suitable for co-operating with the recessed shaped edge of a respective prong (10). Hydraulic connection, e.g. between a machine and a hydraulic source.