Abstract: A hydraulic coupling for feeding hydraulic actuators, particularly for distributing pressurized oil to a plurality of hydraulic motors mounted on a rotating structure such as a drum feeder for feeding bars to an automatic multispindle lathe; the motors are angularly distributed around the rotation axis of the structure, and the coupling comprises a plurality of ducts which branch out axially from the structure and are angularly distributed with respect to the rotation axis; the ducts are connected to the delivery and the return of the motors at one end and, at the opposite end, by means of respective flexible hoses, to a stationary distributor for connecting the motors to a source of pressurized oil and to the oil discharge; the flexible hoses are arranged in a spiral around the rotation axis and have a length which allows the rotation of the structure with respect to the distributor through a preset angle; the distributor comprises valves for controlling the flexible hoses which are actuated so as to connect

Abstract: A device for guiding a bar at the outlet of a lathe feeder, particularly of an automatic lathe, comprising: a tubular body, which is fixed to the outlet of the feeder coaxially to the rotation axis of the bar; and a plurality of circular annular elements, which are mutually adjacent and lie on planes which are perpendicular to the bar rotation axis and are articulated inside the tubular body about axes which are angularly distributed around the axis and so that the center of the elements can oscillate along a circular path which passes through the axis; the elements have respective arms which protrude outside the tubular body through slots of the body and are articulately coupled to a sleeve which is supported so that it can rotate on the tubular body; the sleeve is controlled by an actuation which turns it in both directions, so as to produce an oscillation of the elements in a position which forms a passage for the bar which is delimited by portions of the circular annular elements.

Abstract: A device for transferring a bar from an inclined supporting surface into the guiding channel of a bar feeder, comprising multiple elements which are articulated below the supporting surface, each element being composed of a bar abutment and follower lever, which is actuated so as to oscillate between a position in which it abuts against the bar arriving from the chute and a position for depositing the bar in the guiding channel, and of a bar supporting lever, which is operatively associated with the abutment lever and forms, together with the lever, a slot for receiving the bar which arrives from the supporting surface; the supporting lever is operatively associated with the abutment lever so that it oscillates in a manner in which it surpasses the abutment lever during rotation from the bar receiving position to the position for depositing the bar in the guiding channel.

Abstract: The present invention relates to a bar guide device for bar feeders in machine tools. The device has a plurality of guiding units which are longitudinally aligned. Each guiding unit has a pair of sprockets which are rotatable and have polygonal peripheral grooves. The grooves are constituted by semicylindrical recesses which have different diameters and form, in the mutually opposite position, a guiding channel for a bar to be fed toward the machine tool.