Abstract: A system for simulating brake feel for a vehicle braking installation comprising a hydraulic braking system (7, 8) and an electric braking system (9). This system comprises a first chamber (20) containing a force transmitting fluid (21) and in which there slides a hydraulic piston (22) under the control of a manual braking operating member (1), the first chamber (20) communicating with a second, secondary simulation chamber (4) via a simulation valve (3), the degree of opening of which allows a force to be simulated at the brake pedal.

Abstract: A vehicle braking assembly comprising a master cylinder (10) with no central valves, a brake fluid reservoir (62) mounted separately from the master cylinder (10), pumps (50) for pressurizing the brake fluid and first solenoid valves (68) in pipes (66) connecting the brake fluid reservoir (62) to the inlets of the pumps (50). According to the invention, a calibrated orifice (76) and a nonreturn valve (78) which are connected in parallel are mounted in these pipes (66).

Abstract: A vehicle braking assembly comprising a master cylinder (10) with no central valves, a brake fluid reservoir (62) mounted separately from the master cylinder (10), pumps (50) for pressurizing the brake fluid and first solenoid valves (68) in pipes (66) connecting the brake fluid reservoir (62) to the inlets of the pumps (50). According to the invention, a calibrated orifice (76) and a nonreturn valve (78) which are connected in parallel are mounted in these pipes (66).

Abstract: The invention relates to a system for simulating brake feel for a vehicle braking installation comprising a hydraulic braking system (7, 8) and an electric braking system (9). This system comprises a first chamber (20) containing a force transmitting fluid (21) and in which there slides a hydraulic piston (22) under the control of a manual braking operating member (1), said first chamber (20) communicating with a second, secondary simulation chamber (4) via a simulation valve (3), the degree of opening of which allows a force to be simulated at the brake pedal.

Abstract: Motor vehicle braking installation comprising a master cylinder (10) operated by a brake pedal and connected to a brake fluid reservoir (30) and to feed circuits (26, 28) supplying the wheel brakes, characterized in that the brake fluid reservoir (30) is mounted on the master cylinder and is connected to the master cylinder (10) by connecting means (32, 34) involving electrically operated valves (36, 38) which valves are closed in the rest position and are made to open by a computer (C) on the basis of an output signal from a position sensor or displacement transducer (40) associated with the brake pedal or with the said element moved by this pedal.

Abstract: A braking device for a motor vehicle having a first brake circuit (10) with a master cylinder (11) controlled by a brake pedal (12), a second brake circuit (20) with at least one pump (27) that is controlled by a computer (C), and a pedal travel simulation mechanism (40). The simulation mechanism (40) includes a solenoid valve (41) that is mounted in a pipe (42) connected to a hydraulic fluid storage chamber (43) and controlled by the computer (C) so as to allow the brake fluid to flow toward the chamber (43) when the second brake circuit (20) is active and when the driver presses on the brake pedal. The pipe (42) is also connected to another pipe (44) in which hydraulic fluid is displaced by a first part (45) of a control rod connected to the brake pedal (12) and second part (46) associated with the master cylinder (11).

Abstract: A calibration process for a pneumatic-assistance servomotor in a braking circuit of a motor vehicle. The values of the output pressure (Pmc) of a hydraulic master cylinder associated with the servomotor and of the negative pressure inside the working chamber of the servomotor are measured and recorded with respect to a given negative-pressure value (Pfc) inside a negative-pressure chamber of a servomotor for several operating points P1, P2, P3, P4 of the servomtotor. The operating points being located on either side of a saturation point to precisely determine the coordinates of the saturation point and thereby provide an accurate control of advanced functions of the servomotor with respect to braking operation, the braking assistance and/or the monitoring of the performance or of the ageing of the servomotor.

Abstract: A braking device for a motor vehicle having a first brake circuit (10) with a master cylinder (11) controlled by a brake pedal (12), a second brake circuit (20) with at least one pump (27) that is controlled by a computer (C), and a pedal travel simulation mechanism (40). The simulation mechanism (40) includes a solenoid valve (41) that is mounted in a pipe (42) connected to a hydraulic fluid storage chamber (43) and controlled by the computer (C) so as to allow the brake fluid to flow toward the chamber (43) when the second brake circuit (20) is active and when the driver presses on the brake pedal. The pipe (42) is also connected to another pipe (44) in which hydraulic fluid is displaced by a first part (45) of a control rod connected to the brake pedal (12) and second part (46) associated with the master cylinder (11).

Abstract: A pneumatic-hydraulic hybrid pneumatic brake booster is improved. Additional hydraulic boosting (19, 20) provided by a hydraulic circuit is provided beyond a saturation point (Psat) in the operation of the pneumatic circuit. Hysteresis-induced instabilities in the pneumatic part of the booster are taken into consideration (50). A choice is made to compensate (A) for the shortfall in operation of the pneumatic circuit using the hydraulic circuit. In one example, this correction is afforded via a microprocessor which imposes a corrected process signal. Using this signal, pressure shifts in the pneumatic system are neutralized.

Abstract: The technical field is that of pre-filled disposable needleless syringes, operating with a gas generator (100) and used for intradermal, subcutaneous and intramuscular injections of liquid active principle for therapeutic purposes in human and veterinary medicine. The inventive needleless syringe (1) is characterised in that it comprises a compact architecture body (2) and the gas generator (100) is released by a cap (17) covering said body (2), said cap (17) being adapted to slide along said body (2). Said releasing mode provides the syringe with great stability (1) at the time of injection.

Abstract: The calibration process according to the invention, intended for a pneumatic-assistance servomotor for a braking circuit of a motor vehicle, consists in measuring and recording, on the basis of a given negative-pressure value (Pfc) inside the negative-pressure chamber of a servomotor, the values of the output pressure (Pmc) of the hydraulic master cylinder associated with said servomotor, and of the negative pressure inside the working chamber of the servomotor, for several operating points P1, P2, P3, P4 of the servomotor, located on either side of the saturation point so as to determine the coordinates of the saturation point precisely, for an accurate control of the advanced functions, as concerns the braking operation, the braking assistance and/or the monitoring of the performance or of the ageing of the servomotor.

Abstract: Pneumatic brake-booster with additional hydraulic boosting and method for boosting braking using such a booster.

Abstract: The technical field is that of pre-filled disposable needleless syringes, operating with a gas generator (100) and used for intradermal, subcutaneous and intramuscular injections of liquid active principle for therapeutic purposes in human and veterinary medicine. The inventive needleless syringe (1) is characterised in that it comprises a compact architecture body (2) and the gas generator (100) is released by a cap (17) covering said body (2), said cap (17) being adapted to slide along said body (2). Said releasing mode provides the syringe with great stability (1) at the time of injection.

Abstract: A servobrake having a rigid jacket defined by a first shell joined to a second shell by through tie-bars to create variable volume front and rear chambers. The front chamber is permanently connected to a first pressure source whereas the rear chamber is selectively connected to the first pressure source and a second pressure source. The servobrake including a pressure sensor for the measurement of the pressure inside of the front and rear chambers. The pressure sensor is characterized by being attached to a front end of the through-tie bar whereas the tie-bar is characterized by a hollowed-out body with a hollow inner needle sealingly retained therein. The hollow inner needle defines a first chamber while a second chamber is defined by a space between the inner hollow needle and the hollowed-out body. The hollowed-out body has first ports therein for connecting the rear chamber with the first chamber through which pressure present in the rear chamber is transmitted to the pressure sensor.

Abstract: A pneumatic servobrake having a detector (13) for the measurement of the pressure in a front chamber (1). The detector (13) has a baseplate (14) that is situated opposite an opening (25) in a wall (26) of the front chamber (1). A yoke-forming cage (38) that is placed over the opening (25) has an opening (40) that is traversed by a pressure sampling tube (16). The tube has a collar (41) that is retained between the cage (38) and the baseplate (14). An adapter (23) connected to the wall (26) urges the tube (16) against the cage (38) to allow for both a sideways motion (20) and a tilting motion (21). The lower part (31) of the tube (16) is fitted with an O ring (33) to establish a sealed pneumatic connection between the tube (16) and baseplate (14) such that a first sensor (15) is isolated from a second sensor (48) in a measurement of pressure in the first chamber (1).