Abstract: A fluid product dispensing device having a reservoir with a dose of fluid product, a piston-stopper mounted to slide in the reservoir, a dispensing head with a dispensing orifice axially movable to move the piston-stopper to dispense the fluid product. The piston-stopper has a hollow sleeve with a central receiving zone substantially at the axial and radial center of the piston plug. A shut-off element is positioned in the central receiving zone in a shutting-off position and, during actuation, expelled from the shutting-off position towards an open position. The central receiving zone is extended axially on one side by a lower receiving zone having two wall parts separated by at two axially extending radial grooves, the wall parts holding the shut-off element in its open position, with the fluid product able, during actuation, to flow from the reservoir around the shut-off element in the open position towards the dispensing orifice.

Abstract: A filling head for a device having a valve with a valve shutter, the head having a body having a receiving space, a control member that slides in the body between rest and filling positions, the member having a channel that opens into the receiving space, a ring fixed to the member and cooperating with a spring disposed between the ring and the body, and a plate fixed to the body and a housing for receiving the valve, such that, in the filling position, the valve shutter opens into the receiving space. In the filling position, the receiving space is sealed off, having a first seal between the control member and the body, a second seal between the body and the receiving plate, and a third seal between the receiving plate and the valve shutter, the third seal cooperating with an external lateral wall of the valve shutter.

Abstract: Metering valve having a valve body (10) containing a metering chamber (20) defined by a chamber insert (40) and a top and a bottom seal. The chamber insert (40) has a cylindrical wall (49) with an upper edge (41) cooperating with the top seal and a lower edge (43) with the bottom seal. A valve shut-off element (30) slides between rest position and dispensing positions. The valve shut-off element is urged towards its rest position by a spring (8) cooperating with the valve body (10) and the valve shut-off element. The lower edge of the chamber insert forms a flange and has a downward axial projection. The bottom seal has an axial opening (225) accepting an axial projection (45) and passing through the axial opening. The rest position of the valve shut-off element is defined by contact between the axial projection and a part of the valve shut-off element.

Abstract: A filling head for a device having a valve with a valve shutter, the head having a body having a receiving space, a control member that slides in the body between rest and filling positions, the member having a channel that opens into the receiving space, a ring fixed to the member and cooperating with a spring disposed between the ring and the body, and a plate fixed to the body and a housing for receiving the valve, such that, in the filling position, the valve shutter opens into the receiving space. In the filling position, the receiving space is sealed off, having a first seal between the control member and the body, a second seal between the body and the receiving plate, and a third seal between the receiving plate and the valve shutter, the third seal cooperating with an external lateral wall of the valve shutter.

Abstract: Metering valve having a valve body (10) containing a metering chamber (20) defined by a chamber insert (40) and a top and a bottom seal. The chamber insert (40) has a cylindrical wall (49) with an upper edge (41) cooperating with the top seal and a lower edge (43) with the bottom seal. A valve shut-off element (30) slides between rest position and dispensing positions. The valve shut-off element is urged towards its rest position by a spring (8) cooperating with the valve body (10) and the valve shut-off element. The lower edge of the chamber insert forms a flange and has a downward axial projection (48). The bottom seal has an axial opening (225) accepting an axial projection (45) and passing through the axial opening. The rest position of the valve shut-off element is defined by contact between the axial projection and a part of the valve shut-off element.

Abstract: A fluid product dispensing device having a reservoir with a dose of fluid product, a piston-stopper mounted to slide in the reservoir, a dispensing head with a dispensing orifice axially movable to move the piston-stopper to dispense the fluid product. The piston-stopper has a hollow sleeve with a central receiving zone substantially at the axial and radial center of the piston plug. A shut-off element is positioned in the central receiving zone in a shutting-off position and, during actuation, expelled from the shutting-off position towards an open position. The central receiving zone is extended axially on one side by a lower receiving zone having two wall parts separated by at two axially extending radial grooves, the wall parts holding the shut-off element in its open position, with the fluid product able, during actuation, to flow from the reservoir around the shut-off element in the open position towards the dispensing orifice.

Abstract: An electromagnet is provided comprising a fixed yoke, a movable armature including a core concentric with an energization coil, and magnetizable plates separated from the yoke by a variable longitudinal air-gap, a return means providing the rest position of the armature, and a compensation device comprising a thin U shaped stirrup piece whose two legs cooperate with the ends of the plate, portions of this stirrup cooperate with inclined ramps of an adjustable rotary cam, placed concentrically with the core of the armature.