Abstract: An accessory for connecting a portion of a first conduit to a portion of at least one second conduit or to another accessory, which accessory includes a base element and an end element including complementary engagement elements co-operating with one another to allow relative displacement between the end element and the base element between a position in which the end element is deployed relative to the base element, and a position in which the end element is retracted onto the base element. The accessory includes resilient return elements distinct from the complementary engagement elements and suitable for acting between the base element and the end element in order to return the end element into the deployed position.

Abstract: An angle accessory for skirting ducts includes two flaps mounted to pivot about a pivot axis via assembly structure including two male engagement elements on the first flap and two female engagement elements on the second flap. In the vicinity of the male engagement elements, the first flap has at least one flange projecting from one of its end edges and forming an obstacle that co-operates with at least one lip of the first flap to define at least one passageway giving access to at least one male engagement element, the passageway having a small height constraining the flaps to be assembled together by bringing the second flap towards the first flap while tilting the second flap relative to the first flap's pivot axis, and then by straightening up the second flap along the pivot axis so as to engage successively the female engagement elements over the male engagement elements.

Abstract: An angle connection accessory is to be disposed at the junction between at least two skirting ducts extending in different directions. The angle connection accessory includes a plate having: a web; an inlet side face and an outlet side face that extend perpendicularly to at least one partition that is perpendicular to the web and that mutually isolates a first compartment and a second compartment; and an outlet face parallel to the partition via which firstly the first compartment opens directly to the outside, and secondly the second compartment also opens to the outside via a channel isolated from the first compartment and extending substantially perpendicularly to the partition between the second compartment and the outlet face. The plate includes two flaps hinged relative to each other via a hinge so as to form an angle between them, the channel extending at the join between the two flaps.