Abstract: Some embodiments are directed to a positive displacement pump having an eccentric piston, comprising a tube having a first end and a second end that is terminated by a cylinder secured to a delivery zone, the tube including an intake opening and a delivery opening, a drive shaft extending between the transmission zone and the tube, a piston arranged in the delivery zone and mounted in a sliding manner at the end of the shaft, being pressed against the cylinder by an elastic presser so as to prevent fluid displacement between the tube and the delivery zone when the pump is dry, and the elastic presser is provided to press the piston against the cylinder when the pump is running under load.

Abstract: Some embodiments are directed to a positive displacement pump comprising: a pipe having a first end secured to a transmission area and a second end ending in a cylinder secured to a discharge area, the pipe comprising a suction opening and the discharge area comprising a discharge opening, a drive shaft with one end situated at the cylinder, a piston pressed against the cylinder by elastic means so as to prevent fluid from moving between the pipe and the discharge area, in which the pump further comprises means for moving the piston elastically away from the cylinder and keeping it at a predetermined distance from same. Some other embodiments are directed to a method for cleaning this pump.

Abstract: A peristaltic pump (1) comprising a pump body (2), an inlet (21), an outlet (22) and a pipe (4) attached to the inlet (21) and to the outlet (22) by a device comprising: —a flange (5) held to the pump body (2) by a bracket (6), —an insert (8), inserted against the inner wall (41) of the pipe (4) and comprising a shoulder (82), the inner wall of which bears against the outer wall (52) of the flange (5), characterised in that the pump body (2) comprises an inner circular groove (23) at the inlet (21) and at the outlet (22), and in that the securing device comprises a deformable elastic ring (10) inserted into said circular groove (23), and a pusher (11) having the shape of a ring comprising a projection matching the shape of the groove, the elastic ring (10) being compressed by the pusher (11).

Abstract: The disclosure relates to a device for pressurising a fluid to be combined with a rotary power takeoff of a vehicle including a casing and at least one multiplication stage, the device including a frame bearing at least one first rotatably moveable shaft bearing a member for moving the fluid and dynamic coupling means for coupling the shaft to the power takeoff. The frame includes means for bearing and attaching to the casing and the coupling means are arranged so as to directly connect the mobile shaft to the multiplication stage of the power takeoff. The disclosure also relates to a device for pressurising a fluid, including a frame, rotatably moveable first and second shafts each bearing a member for moving the fluid, and dynamic coupling means for coupling the first or second shaft to the power takeoff, including a removable pinion that can be alternately mounted on the first or second shaft.

Abstract: The application relates to a sealed device for transmitting a rotational movement inside a chamber from a drive shaft to a driven shaft, said drive shaft including at least one input section extending through a wall of the chamber and supported by two bearings, one of which is located inside the sealed casing very close to the output section, and intended to co-operate with a rotational drive means, and an output section engaged with the driven shaft and inclined by an angle a in relation to the input section. The device includes a sealed casing surrounding the portion of drive shaft located in the chamber. The sealed casing includes at least: a bellows portion conferring flexibility on the casing at the intersection between the axis of the input section and the axis of the output section of the drive shaft; and a rigid sleeve extending alongside the bellows portion in the direction of the end of the output section of the drive shaft.

Abstract: An airtight rotating driving device with eccentricity, especially for volumetric pump, the device including a bent shaft (1) presenting an input axis (5) and an output axis (10) parallel and off-centered in such a way as to carry out an orbital circular movement, and an airtight and non-rotatable sleeve (14) surrounding the shaft and comprising two metallic bellows (19, 20) linked by a guiding ring (21) mounted longitudinally in a sliding relation on the sloped intermediate section (17) of the shaft. The device converts a rotating movement into an orbital circular movement with an absolute airtightness.

Abstract: A vane control unit for a vane pump having reversible control, the pump having a rotor, a rotor shaft and a vane control unit including vane thrusters inserted into housings arranged in the rotor shaft and designed to control the movement of the vanes outside of their respective housings in the rotor. The vane control unit has thrusters, each of the thrusters is adapted to be connected to two diametrically opposed vanes. The thrusters are semi-cylindrical in shape, have a planar surface and are arranged in groups of two so that their axes, each in their planar surface, are concurrent and coplanar. The thrusters are mounted in sliding engagement in respective cylindrical channels perpendicular to the rotational axis of the rotor shaft and form an angular space between them which depends on the number of vanes in the pump.