Abstract: The electromagnetic actuator comprises an electric coil mounted in a magnetic yoke, first and second pole parts, which are connected to the yoke and each of which extends near a free space in which a magnetic core is translationally displaceable by the action of the power supply to the electric coil and the formation of different magnetic fields in the pole parts. The inventive actuator consists of a tubular part, which is made of a magnetic material, delimits, at least partially, the free space, surrounds the magnetic core for guiding the displacement thereof and has magnetically continues with the pole parts in such a way that the radial air gap between the magnetic core and the magnetic pole parts is reduced.

Abstract: The invention relates to a hydraulic slide valve for controlling flow-rate or pressure comprising at least one movable valve moving from a closed position by contacting a seat and an open position remote therefrom, the displacement of said valve being controlled by a piezoelectric washer.

Abstract: The electromagnetic actuator comprises an electric coil (1) mounted in a magnetic yoke (2), first and second pole parts (3, 4), which are connected to the yoke (2) and each of which extends near a free space (5) in which a magnetic core (6) is translationally displaceable by the action of the power supply to the electric coil (1) and the formation of different magnetic fields in the pole parts (3, 4). The inventive actuator consists of a tubular part (7), which is made of a magnetic material, delimits, at least partially, the free space, surrounds the magnetic core (6) for guiding the displacement thereof and has magnetically continues with the pole part(s) (3, 4) in such a way that the radial air gap between the magnetic core (6) and the magnetic pole part(s) (3, 4) is reduced.

Abstract: The invention relates to a hydraulic slide valve for controlling flow-rate or pressure comprising at least one movable valve moving from a closed position by contacting a seat and an open position remote therefrom, the displacement of said valve being controlled by a piezoelectric washer.

Abstract: The invention concerns a control valve (c) for internal gas pressure of a liquid tank co-operating with an orifice (10) provided in the upper part thereof, allowing through a gas flow outside the tank when the difference between the internal pressure and the external pressure reaches a predetermined threshold, and an inverse flow when the internal pressure of the tank is lower than the external pressure. The invention is characterised in that the valve comprises a body (1) whereof the lower part is configured to close the tank orifice (10) with a mass such that beyond said pressure differential value constituting the predetermined threshold, the body (1) is spaced apart from the orifice (10), said body (1) further comprising a through recess (4) arranged in the extension of the tank orifice (10) when they are in contact, said recess (4) being provided with closing means (3) capable of being activated when the differential pressure between the tank and outside atmosphere is positive.

Abstract: The invention concerns a control valve (c) for internal gas pressure of a liquid tank co-operating with an orifice (10) provided in the upper part thereof, allowing through a gas flow outside the tank when the difference between the internal pressure and the external pressure reaches a predetermined threshold, and an inverse flow when the internal pressure of the tank is lower than the external pressure. The invention is characterised in that the valve comprises a body (1) whereof the lower part is configured to close the tank orifice (10) with a mass such that beyond said pressure differential value constituting the predetermined threshold, the body (1) is spaced apart from the orifice (10), said body (1) further comprising a through recess (4) arranged in the extension of the tank orifice (10) when they are in contact, said recess (4) being provided with closing means (3) capable of being activated when the differential pressure between the tank and outside atmosphere is positive.

Abstract: A dual rotor motor assembly having two coils in lateral arrangement on opposite sides of each rotor, with each rotor having one of the coils in common. The rotors are disposed in pole cages formed in two spaced parallel pole plates; and, the coils are disposed between the plates. In the preferred arrangement the pole plates have a generally “V”-shaped configuration.

Abstract: A solenoid operated valve with a magnetic can or jacket with a closed end received over the coil and retained by crimping over a tubular flanged pole washer received over the opposite end of the coil. An inlet orifice is formed in the closed end of the jacket and a radial valving passage communicates the inlet orifice with an outlet between the coil and jacket. A moveable magnetic armature is disposed within the coil and has a non-magnetic planar valving member provided in one end for seating around the inlet orifice when the solenoid is energized.

Abstract: The invention features, (i) a fan-shaped or otherwise axially deformable washer structure (4D) between a screwed element (5,5A) and a valve body member or coil jacket (3); (ii) a conical preferably self-tapping or self-cutting, a fine, screw thread (8) moving with the element; (iii) a thin valve carcass which may be distorted or even broken by normal screw-in pressures encountered, or by heating-up effects; (iv) the washer forming part of or being integral with the magnetic circuit of the solenoid; (v) a return spring (7A) in the gap (7), between the two armature parts (5,6) e.g., lodged in recesses in the adjacent faces thereof; and (vi) an annular recess (9) in the periphery of the "fixed" armature part (5), to accommodate an O-ring, if satisfactory fluid sealing should require it; also a further axial interval (10) to accommodate a certain freedom of screw-in.