Abstract: A device for measuring the volumetric flow rate of a fluid, particularly a lubricant fluid in a hydraulic circuit, comprising a distributor block provided with an entry bore and an exit bore, and a feed duct and return duct respectively to and from a measurement block removably supported by the distributor block, the distributor block having elements therein for adjusting the fluid feed to the measurement block, the measurement block comprising interface elements between the two blocks, a member eccentrically orbiting within a chamber defined by the casing containing the measurement block and interface elements, and guide elements for the movement of the member. A sensor is connected to the measurement block to ascertain the movement of this member, this sensor being connected to an electronic microprocessor circuit arranged to determine the fluid volumetric flow rate through the distributor block.

Abstract: A progressive hydraulic distributor which comprises a control block containing three pistons disposed at the vertices of an ideal triangle and ducting for the lubricant fluid, and is removably supported on a second block comprising only ducts with a purely distributing function. The connections between the ducts of the second block and the ducting of the first block are made by way of several ports, and in particular by passage ports comprising two distinct holes which are in mutual communication but can be separated from each other by O-rings, these connections being such as to enable the output fluid flow rate to be varied without disconnecting any pipe connected to a user.

Abstract: A device is described and shown for supplying tandem line fluid systems, the device comprising pumping means driven by an electric motor and a slide valve for alternately supplying the pressure fluid to either of the two lines, wherein the pump slide valve is controlled by using as the above motor a reversibly rotating type of electric motor, transmitting torque in one direction for controlling through a one-way drive clutch the pump, and in the other direction the slide valve through a second one-way drive clutch transmitting the torque in the opposite direction.