Abstract: A cylindrical housing (1) and a body (4) having a shape matching the shape of the housing (1). The body (4) is immobilized, so as to compress the elastically compressible part (3), by a split ring (6) placed in a groove (7) of the cylindrical wall of the housing (1). The shape and dimensions of the ring (6) are selected in such a way that it bears against a peripheral surface of the body (4) in order to prevent it from moving outwards. The ring (6) is locked in the groove (7) by a collar (8) having zones (82) which, by virtue of their shape, prevent the ring (6) from moving out of the groove (7) and bulges (81) interacting with a groove (41) of the body (4) for the fixing by snap-fitting of the collar onto the body.

Abstract: The object of the method is to form a restraint intended to retain a split ring 5 for fixing a part, in particular a circular part 3 on an internal bearing surface 4 of the tubular part. The method consists in deforming a thinned portion 7 of the tubular part by means of a tool 9 using the split ring 5 as a means for forming the restraint.

Abstract: The pressure regulator comprises a valve with a slide member (5) whose displacements are controlled by the pressure prevailing in the control chamber (7). This pressure is adjusted by an obturator (11) of tubular shape which, in its upper position, places the chamber (7) in communication with the opening (4) of the fluid outlet. The fluid is admitted into the valve by an opening (2) and the displacements of slide member (5) permit adjusting the pressure in the opening (3) which supplies a user. The control chamber (7) is fed from the opening (3) through a conduit (20) with fluid whose pressure is already adjusted.

Abstract: The electromagnetic valve comprises a movable core (8) adapted to be drawn toward a fixed core (7) under the influence of a magnetic field of an excitation winding (5). The lower portion of the core (8) has a skirt (11) surrounding a cylindrical member (9) which is shaped such that the fluid moving from passage (2) to passage (3) will be directed radially relative to the skirt (11), so as to avoid the exertion of a force on the core (8) in its direction of movement.

Abstract: A valve for fluid comprises a body (1) of molded synthetic resin, this body (1) being surrounded by a casing (25) constituted by an extruded profile. This casing (25) has openings (30) in which are fixed plugs (31) having a screw-threaded bore and constituting connectors permitting connecting the valve to the tubing. Joints (34) between the plugs (31) and the valve body are provided to permit relative displacement between these parts without loss of sealing during displacement due to differences of expansion of the members as a function of temperature.

Abstract: A valve with four passages controls a piston (15) disposed in a cylinder (16). Between the body (1) of the valve and the cylinder (16) is disposed a plate (23) having passages (24, 25) which are used and a passage (26) which is not used in FIG. 1. By turning plate (23) 180.degree., the passage (24) is located in the non-use position, while the passage (26) connects the conduits (19 and 13) in such a way as to cause the space (21) of the cylinder (16) to communicate continuously with an exhaust orifice (6).

Abstract: A solenoid valve includes a valve body (3), a ferromagnetic fluid flow damper (4) cooperating with a seat (6), to form a fluid sealing surface, an electromagnetic field coil (11) for selectively displacing the damper (4) against the action of a spring (7) by a magnetic field produced by an energization of the coil, an intake conduit (19) and an outlet conduit (20). The valve body (3) is housed in a cylindrical chamber (2) of a hydraulic unit (1) with an internal fluid intake pipe (14) and an internal fluid outlet pipe (22), communicating with their respective fluid intake (19) and outlet (20) conduits in the valve body (3). A flexible joint (16) connects the wall of the cylindrical chamber (2) with the rim of the intake conduit (19) and a compression spring (23) is located between the lower side (24) of the body (3) and the hydraulic unit (1) to provide an elastic suspension for the body (3).

Abstract: The valve consists of a closing device (7) pushed by a spring (8) to press the sealing face (9) against its seat (13). The closing device (7) can only be moved by action on the handle (18) provided the magnetic core (32) is attracted to the left, to enable the rod (35) to move the part (26) against the opposing action of a spring-loaded (39) bush (38). When the handle (18) is then operated, the rod (20) moves the part (26) downwards, which in turn presses down the rod (30) and allows the spring (8) to move the closing device (7) downwards. The part (26) is then locked by the engagement of its lip (42) beneath the end of a pin (40). If the excitation current is interrupted, the core (32) and the part (26) return to their original position, which releases the moving part (26) and the rod (30).The spring (31) then returns the closing device (7) to the position illustrated.

Abstract: An electromagnetic valve with servo-control is controlled by a movable core. The fluid under pressure contained in the chamber for the servo-control passes by a stationary seat capable of being closed by a flap valve on the core. The seat is fed by fluid under pressure through a conduit in a movable valve through a sliding tube. This tube can be made of plastic material and be reinforced by an externally mounted spring.

Abstract: Control system for an electromagnet having a movable core, wherein a power winding is provided for moving the core to active position and a holding winding requiring less power maintains the core in active position. A transistor controls the power supply circuit and, when made conductive, energizes a transistor in series with each winding, thus energizing both windings. After a time delay provided by a resistor-condenser circuit, another transistor is energized which causes the transistor in the power winding to become non-conductive, thus de-energizing the power winding. De-energizing the control transistor causes the transistor in the maintenance winding to become non-conductive so that the maintenance winding is de-energized and its energy is dissipated through a Zener diode and a resistor, both in series therewith.

Abstract: A servo-controlled valve comprises two valve clacks cooperating with respective seats and mounted on a rod axially movable between two stable positions. Movement of the rod from one stable position to the other is actuated by supplying fluid under pressure to a respective servo-control chamber. When the rod reaches an intermediate unstable position, past which its movement is sustained, the rod actuates opening of an emptying orifice to evacuate the chamber filled with fluid under pressure.

Abstract: A two-way valve has a valve clack cooperating with a seat and mounted with play in a mobile core of an electromagnetic actuator to provide fluid-assisted opening of the valve. The mobile core moves in a chamber connected to the fluid inlet by a restricted annular passage disposed about the core. Movement of the mobile core towards the open position produces an increase in the cross-sectional area of the restricted passage, so that the fluid assistance is initially great, but then decreases.

Abstract: A fluid-assisted electromagnetic valve comprises an element movable in a working chamber as a function of a fluid pressure differential applied by an electromagnetic control. The movable element has inlet and exhaust nozzles in the working chamber which are selectively obturated by respective spring-biased plungers mounted on an extension of a mobile core of the electromagnetic control, according to the direction of movement of the core, to provide the pressure differential. Said extension comes to bear directly against the respective nozzle to ensure movement of the element even when the pressure differential is insufficient.

Abstract: An electromagnetic actuator having a plunger core and a stationary ferromagnetic core, both surrounded by an electrical winding, is provided with means for adjusting the axial position of the stationary core in relation to the winding, said means being operable from outside the actuator.