Abstract: A heating and ventilating apparatus for a motor vehicle includes a cold air admission duct supplying the admission and heating circuit in order to produce a stream of cold or heated air for introduction into the inlet of a distribution circuit having air outlet ducts which exhaust into different parts of the cabin of the vehicle.The apparatus includes a priority demisting duct which is separate from the distribution circuit, and which has an inlet communicating with the admission and heating circuit, together with an outlet which exhausts behind the windshield. A shut-off valve is displaced between a priority demisting position, in which it closes off the inlet of the distribution circuit, and a normal position in which it closes off the inlet of the priority demisting duct.

Abstract: A heating system for an automobile comprising a circulation circuit for the coolant fluid of the engine of the vehicle, including a primary heating circuit connected to the engine and a secondary heating circuit including a heat exchanger positioned to heat the air to be transmitted into the passenger area of the vehicle and a heat generator separated from the primary heating circuit to accelerate the increase of the temperature of the fluid in the heat exchanger.

Abstract: The invention relates to an electric control device for controlling displacement of a moving element (22) between two predetermined positions, said element (22) being associated with one or two electrically conductive return means (18, 30) having shape memory which exert substantially no return force on the element (22) so long as no electric current is passing therethrough, and which exert sufficient force thereon to displace it when an electric current is caused to pass therethrough, with an electric current being switched through one or other of the return means by a controlling switch (10). Once the moving element has reached the desired predetermined position, the electric current used to move it is interrupted by means of a toggle switch (24) operated by the moving element. The invention is applicable to selecting pneumatic functions, e.g. in the motor industry.

Abstract: A device for controlling the displacement of a moving member by means of of a fluid distributor connecting a single-acting actuator for displacing the moving member to a source of fluid under pressure and to an exhaust, wherein the fluid distributor comprises a fixed element (68) having hoses providing fluid connections to the actuator, to the source of fluid under pressure, and to the exhaust, a moving element (64) constrained to be displaced by manually-operated control means, and a moving element (66) constrained to move with the moving member or the piston rod of its actuator. The invention is particularly applicable to controlling the displacement of flaps in an installation for heating and ventilating or for air conditioning a motor vehicle.

Abstract: Apparatus for controlling a plurality of moving members, e.g. the flaps in an installation for heating and ventilating or for air conditioning a motor vehicle, comprises single-acting actuators (46, 48) whose piston rods (50, 52) are connected to rotate the flaps about their respective axes (12, 14), with the actuators (46, 48) being fed from a pressurized fluid distributor (32) which includes moving elements which are respectively connected to control means and to each of the piston rods (50, 52), together with fluid flow servo control means for putting the displacement of one flap under the control of the displacement of another flap.

Abstract: The device for controlling the displacement for a moving member such as a flap (46) includes a fluid distributor valve (10) actuated by control means (18) and suitable for connecting a single-action actuator (38) to a source of fluid under pressure, or to an exhaust, or for isolating said actuator from said source and said exhaust. The piston rod (40) of the actuator is connected to a moving element (14) of the distributor valve and also to the moving member (46) by common motion transmission means. The invention is applicable, in particular, to controlling flaps in installations for heating and ventilating or for air conditioning motor vehicles.

Abstract: A vacuum control device comprises a casing in which are disposed at least two substantially parallel movable cups, the first cup being connected to the element to be displaced. Springs are interposed respectively between the two cups and between the second cup and a bottom end-wall of the casing. Two pipes or nipples connected to a vacuum source and to atmospheric pressure open into the casing respectively within the space located between the two cups and within the space located between the second cup and the casing end-wall.

Abstract: The invention relates to a control device for a moving member such as a flap (20) under the control of an actuator (24a) which is supplied with fluid under pressure and connected to an exhaust by means of a slide valve (10a) which includes three elements (12a, 14a, and 15a) one of which moves with the flap (20a), another of which is movable under manual control (30a), and the third of which is fixed and forms the connection to a source of fluid under pressure and to the exhaust. The invention may be used, in particular, for controlling the flaps in an installation for heating or for air conditioning the cabin of a motor vehicle.

Abstract: A housing (10, 12, 14) has first and second flexible membranes (32, 42) dividing it into two sealed chambers plus a third chamber from which the movable member (38) projects. Each membrane co-operates with a respective cup (40, 50) and return springs (54, 56) tend to urge both cups away from an end wall (26). The two cups are interconnected by a single piece member (58) which is inextensible but which can readily be bent in two to enable the cups to come into contact with one another. Each sealed chamber can individually be selectively connected to a source of reduced pressure via a respective orifice or pipe fitting (30, 28). The position of the movable member (38) can thus be changed.

Abstract: A vacuum control device comprises a casing in which are disposed at least two substantially parallel movable cups, the first cup being connected to the element to be displaced. Springs are interposed respectively between the two cups and between the second cup and a bottom end-wall of the casing. Two pipes or nipples connected to a vacuum source and to atmospheric pressure open into the casing respectively within the space located between the two cups and within the space located between the second cup and the casing end-wall.

Abstract: A fluid flow selector valve for controlling step-by-step displacement of an on/off actuator (12), e.g. for controlling a flap in an installation for heating or for air conditioning the cabin of a motor vehicle. The valve comprises two mutually movable elements (80, 84) defining at least two chambers (90, 92) therebetween suitable for connecting the actuator feed inlet (30) to a source of fluid pressure (72) or to an exhaust. The valve further comprising an intermediate chamber (94) suitable for connecting the feed inlet to the source of fluid pressure (72), to the exhaust, or to an air tight seal.

Abstract: A cock device for controlling the operation of a heat exchanger comprises a body interposed between liquid supply and return ducts and liquid inlet and outlet ducts of the exchanger, and a plug rotatably mounted in the body, said body and said plug being made of a thermally insulating material.

Abstract: A mounting device for a heat exchanger in the housing of an air conditioning and/or ventilation apparatus.A heat exchanger element comprises means for its being hooked to the casing so that the simple introduction of the exchanger in the housing provides at the end of the movement the fixation of the exchanger which is hooked to the casing.The invention is particularly applicable to air conditioning apparatuses for the passenger space of a motor vehicle.

Abstract: A device for setting the closed position of a valve of the type comprising a lever having a ramp acting on a thrust member of a slidable assembly. Adjustment is effected by adjustment means comprising a cam device interposed between the thrust member and the ramp on the lever. The cam device is disposed eccentrically of its journals and it is displaced angularly from the exterior by inserting a screwdriver or the like through a hole in the body. Ratchet teeth are provided on the cam device and cooperate with pawls for retaining the desired position of the cam device when it is attained.