Abstract: The application relates to a venting cap for oil tanks of machines and machinery, including: a cup fitted with a flange along its outer surface, with this flange bearing coupling elements underneath it with complementary elements provided on the access sleeve of the tanks and at the top of shaped engagement tabs, a lid for closing the cup that is snap-fitted onto the cup, fitted with a flange, wherein: the flanged partition houses on its lower surface an insert with a substantially cylindrical profile, the cup body is associated with a spiral labyrinth on top of which is fitted the means for engaging the cup; and above the flange of the cup there is a collar fitted with an external toroidal groove that engages with a raised toroidal thread along the inner surface of an upper closing lid of the cup.

Abstract: Locking device for the opening of a door including two opposite members apt to be mounted to a door and to a post, respectively, and provided with housing holes of screws for the engagement with a surface, one of the bodies including a solid body except for a cavity provided on one of the side walls, the other one of the bodies including an outside shell internally provided with a housing cavity of a sliding body, characterised in that a lock block for the movement of the sliding body is furthermore provided, housed within a cavity provided on the top surface of the outer shell as well as dampening and thrust structure of the sliding body.

Abstract: Manoeuvering flywheel of the type consisting of a main flywheel body composed of a cylindrical base and a crown consisting of a regular series of gripping lobes characterised in that the cylindrical base centrally provides a cylindrical cavity, wherein a septum is located which is centrally perforated, perpendicular to the directrices of the cylindrical cavity, and apt to make up two separate chambers, on the lower surface of which a series of engagement teeth is housed.

Abstract: Maneuver element of the type composed by an element provided, on each end, with a protruding grip and centrally with safety means which can be activated under pressure and controlled from outside, apt to engage the structure on which it is mounted and to prevent the rotation, said pressure activated means, being composed of a button system having a central hole, housed within a depression of said maneuver element, and partially protruding from it, from the base of said button system abutting engaging and retaining plugs, housed free to move longitudinally within the holes obtained in said maneuver element, characterized in that fast remote identification means of the functionality of said maneuver and pressure fast activation means of said engaging and retaining plugs are associated with said button system, said pressure fast activation means of said plugs being composed by the association of engaging elements mounted on a rotor with driving and retaining elements provided on a stator complementary to said ro