Abstract: Valve for the ventilation circuit of a liquid tank, comprising: a) a chamber comprising a base, a side wall and a cover; b) at least two independent ventilation orifices in the chamber cover connecting the chamber to the venting circuit; c) at least one orifice in the chamber side wall connecting the chamber to the inside of the tank; d) at least two independent concentric floats, each comprising an apex capable of sealing one of the ventilation orifices, each being able to slide vertically inside the chamber depending on the liquid level in the chamber and to rest on the chamber base when the chamber is empty; one of the floats being calibrated so as to seal one of the ventilation orifices at one liquid level L1 in the tank and the other float being calibrated so as to seal the other ventilation orifice at a level L2 above L1.

Abstract: A device for a venting circuit of a liquid tank provided with a canister and a filling tube including a filling head, this device comprising: a) a control chamber that communicates with: the canister via a main orifice and a smaller-flow-area secondary orifice, both terminating in a ventilation line leading to the canister; the interior of the tank via the venting circuit; and the filling head via a pressure-equalizing line; b) a closure member that is: provided with an opening therethrough which brings the venting circuit into communication with the pressure-equalizing line; able to move in the control chamber between an operating position with the main orifice closed off by gravity and the secondary orifice left open, and a filling position with both orifices left open; and shaped to sealingly conform to at least a control chamber part that includes the main orifice.

Abstract: A plastic adapter for fuel tanks. The adapter includes crimping lugs for fixing the adapter to a pipe or an opening in the tank.

Abstract: Valve for the ventilation circuit of a liquid tank, comprising: a) a chamber comprising a base, a side wall and a cover; b) at least two independent ventilation orifices in the chamber cover connecting the chamber to the venting circuit; c) at least one orifice in the chamber side wall connecting the chamber to the inside of the tank; d) at least two independent concentric floats, each comprising an apex capable of sealing one of the ventilation orifices, each being able to slide vertically inside the chamber depending on the liquid level in the chamber and to rest on the chamber base when the chamber is empty; one of the floats being calibrated so as to seal one of the ventilation orifices at one liquid level L1 in the tank and the other float being calibrated so as to seal the other ventilation orifice at a level L2 above L1.

Abstract: A device for a venting circuit of a liquid tank provided with a canister and a filling tube including a filling head, this device comprising: a) a control chamber that communicates with: the canister via a main orifice and a smaller-flow-area secondary orifice, both terminating in a ventilation line leading to the canister; the interior of the tank via the venting circuit; and the filling head via a pressure-equalizing line; b) a closure member that is: provided with an opening therethrough which brings the venting circuit into communication with the pressure-equalizing line; able to move in the control chamber between an operating position with the main orifice closed off by gravity and the secondary orifice left open, and a filling position with both orifices left open; and shaped to sealingly conform to at least a control chamber part that includes the main orifice.

Abstract: An assembly of two components configured to be in contact with hydrocarbons, and a fuel tank including the assembly. The assembly includes a casing or a retaining member fastened to the casing, each of the two components including at least one fastening part configured to interact, and at least one of the components being made from a material configured to swell through action of the hydrocarbons, thus reinforcing retention of the components on one another. A method for manufacturing such a tank includes assembling the two components in the absence of fuel, and then bringing the two components into contact with the fuel.

Abstract: Plug system built into the top of a fuel tank filler pipe, comprising a plug with a locking device, a fuel flap able to occupy a position allowing access to the pipe and a position preventing access to the pipe, and a mechanical connection system able to transmit a movement from the flap to the locking device in such a way as to lock or unlock the plug. The mechanical connection system comprises components able to interact by part of a movement of one component being transmitted to another, adjacent component in such a way that only part of the movement of the flap can be transmitted to the locking device in order to lock or unlock the plug.

Abstract: A plastic adapter for fuel tanks. The adapter includes crimping lugs for fixing the adapter to a pipe or an opening in the tank.

Abstract: Sealing system for fuel tank fill head comprising: a valve (3) that can be moved between an open position, in which fuel may be introduced into a fill pipe, and a closed position in which the fill pipe is closed, the valve (3) passing from one position to the other under the effect of a pressure exerted by a filling nozzle head; and a locking system comprising at least two rotatable fingers (4) and an actuation system capable of controlling the moveable fingers (4), the system additionally comprising a rotatable ring (1) equipped with pins (5) that are capable of cooperating with the moveable fingers (4) and the valve (3) that comprises housings (6) that are capable of cooperating with the moveable fingers (4) when the sealing system is in a locking position. The invention also relates to a fill pipe equipped with such a sealing system.

Abstract: Sealing system for fuel tank fill head comprising: a valve that can be moved between an open position, in which fuel may be introduced into a fill pipe, and a closed position in which the fill pipe is closed, the valve passing from one position to the other under the effect of a pressure exerted by a filling nozzle head; a locking system capable of locking the valve in its closed position; and an actuation system capable of being moved between a closed position and an open position under the effect of introducing the filling nozzle into the fill head. The locking system and the actuation system are capable of cooperating together so that a displacement of the actuation system from its closed position to its open position causes a displacement of the locking system from a locked position to an unlocked position. The actuation system comprises a rotatable cam equipped with a coupling pin capable of cooperating with the locking system.

Abstract: Sealing system for fuel tank fill head which comprises: a shutter (1) that can be moved between an open position, in which fuel may be introduced into the fill pipe, and a closed position in which the fill pipe is closed, the shutter (1) passing from one position to another under the effect of the thrust exerted by a filling nozzle (62, 64); a shield (7) that is placed upstream of the shutter (1) and that can be moved between an open position, in which the shutter (1) is accessible, and a closed position in which the shutter (1) is protected from the atmosphere by the shield (7); and a nozzle inhibitor designed so as to only allow opening of the shutter (1) when a filling nozzle head of predefined diameter (62, 64) comes into contact with the nozzle inhibitor. The nozzle inhibitor is integrated into the shield (7).

Abstract: Sealing system for fuel tank fill head comprising: a shutter that can be moved between an open position, in which fuel may be introduced into the fill pipe, and a closed position in which the fill pipe is closed, the shutter passing from one position to the other under the effect of a thrust exerted by a filling nozzle head; a shield placed upstream of the shutter and that can be moved between an open position, in which the shutter is accessible, and a closed position in which the shutter is protected from the atmosphere by the shield; and a nozzle inhibitor comprising components that can be rotated with respect to an axis of rotation substantially parallel to the longitudinal axis of the fill head and designed so as to enable a movement of the shutter from its closed position to its open position when the mobile components have been moved under the effect of a thrust exerted by the filling nozzle head having a predefined diameter on the mobile components.

Abstract: A closure system for the head of a fuel tank filling pipe, including: an essentially circular closure piece provided with a relief; and a moving part for (un)locking the closure piece by a rotational movement about the axis of the closure piece, the moving part including a relief configured to engage with the relief of the closure piece by a bayonet system. The reliefs are of a symmetrical shape allowing continuous rotation in both the clockwise and anticlockwise directions of the moving part relative to the closure piece.

Abstract: The invention concerns a motor vehicle fuel tank (1) comprising a fuel reserve chamber (4) further comprising a suction device supplied with fuel coming directly from a fuel filter and adapted to suck up fuel in at least a low suction point outside the chamber (4), and in delivering it into the chamber (4) at least in a high delivery point, located above the desired minimum level of fuel in the tank (4) and higher than the low suction point.

Abstract: A system for locking a closure mechanism for a fuel-tank filler pipe covered by a fuel flap, the closure mechanism includes a shutter allowing automatic opening of the pipe via action of a fuel-dispensing nozzle, this shutter being retractable through action of thrust directed against it along an axis parallel to the axis of the pipe head and integral with a return spring allowing it to be held in the closed position. The system includes a lever integral with the closure mechanism and having the effect of locking/unlocking it, depending on its position, and a lever arm, integral with the fuel flap, that can act effectively on the lever only to lock the mechanism when it is unlocked and the fuel flap is being closed.

Abstract: A closure system, incorporated into a fuel-tank filler-pipe head, including a shutter and a protection shield, for the shutter, which is movable substantially in one plane, preferably substantially perpendicular to the pipe axis.

Abstract: An assembly of two components configured to be in contact with hydrocarbons, and a fuel tank including the assembly. The assembly includes a casing or a retaining member fastened to the casing, each of the two components including at least one fastening part configured to interact, and at least one of the components being made from a material configured to swell through action of the hydrocarbons, thus reinforcing retention of the components on one another. A method for manufacturing such a tank includes assembling the two components in the absence of fuel, and then bringing the two components into contact with the fuel.

Abstract: The invention concerns a motor vehicle fuel tank (1) comprising a fuel reserve chamber (4) further comprising a suction device supplied with fuel coming directly from a fuel filter and adapted to suck up fuel in at least a low suction point outside the chamber (4), and in delivering it into the chamber (4) at least in a high delivery point, located above the desired minimum level of fuel in the tank (4) and higher than the low suction point.

Abstract: A non-return valve for a fuel tank, the valve comprising a substantially tubular body and a deformable shutter member fixed to said body, said shutter member being formed integrally by molding a plastics material and being shaped in such a manner as to return under its own elasticity into a shut position, with the valve body serving as a seat, whenever the shutter member is at rest and the pressure of fuel is no longer sufficient to overcome the elastic return action of the shutter member.