Abstract: A process for the manufacture of an elongate composite element comprising a bundle (20) of multifilament fibers embedded in a composition based on a polymerizable substance comprising the following comprises: arranging multifilament fibers in the form of several individual strands, so that a first strand (20a) is located at the center of the bundle and that the other strands are positioned around the first strand; and carrying along the arrangement of multifilament fibers in order to subject it, in the direction of forward progression, to degassing of said arrangement of fibres by the action of vacuum, impregnation of the arrangement of fibres with the composition, passage of the first impregnated strand through a first die (10a) which carries out its partial polymerization, passage of all the strands through a last die (10f) which brings them together in a single strand (20f), and exposure of the single strand (20f) to a source of radiation in order to carry out an additional polymerization to obtain the elo

Abstract: A process for depositing a metal-adhesive, hydrophobic and electrically conductive coating based on electrically conductive microparticles and on a polymer matrix P comprising at least one thermoplastic fluoropolymer P1 and a thermosetting resin P2, comprises: in a first container, dissolve the polymer P1 in an organic solvent; in a second container, disperse the electrically conductive microparticles in an organic solvent; add, in the first container, the thermosetting resin P2 in the liquid state; mix the contents of the containers, then deposit the mixture on the substrate; crosslink the resin P2 and remove the solvents, to obtain a first coating; then impregnate the surface of the substrate with an additional resin solution P2 dissolved in a third solvent, which is a solvent of the resin P2 and a non-solvent of the polymer P1; eliminate the third solvent and crosslink while compressing the additional resin P2 in order to obtain the targeted final coating.

Abstract: A method for splicing two bundles (1, 2) of multifilament textile fibers comprises: inserting an end portion of a first bundle (1) into a first end of a heat-shrinkable sheath (10) and an end portion of a second bundle (2) into a second end of the sheath, axially opposite the first end, until the ends of the end portions of the two bundles are facing each other; inserting a curable organic material inside the sheath (10) in a space separating the end portions of the bundles (1, 2); heating a portion of the heat-shrinkable sheath (10) surrounding a joining portion (9) to a predetermined temperature; curing the curable organic material; and removing the sheath (10).

Abstract: The present invention relates to an electrical assistance device (1) for a wheelchair (100) having a seat (103) and at least one rear wheel (104, 105) having a tyre (110), the electrical assistance device (1) comprising: at least one motor (2) having a rotor (22) connected to a pinion (4) designed to mesh with a complementary toothset of the tyre (110), and a mobile arm (6) connecting said motor (2) to the wheelchair (100). The mobile arm (6) allows said motor (2) to be manoeuvred between an engaged position in which the pinion (4) is in contact with the complementary toothset of said tyre (110), a disengaged position in which the pinion (4) is not in contact with the complementary toothset of said tyre (110) and a transport position in which the pinion (4) is distanced from the tyre (110) and retracted beneath the seat (103).

Abstract: The present invention relates to an electrical assistance device (1) for a wheelchair (100) having a seat (103) and at least one rear wheel (104, 105) having a tyre (110), the electrical assistance device (1) comprising: at least one motor (2) having a rotor (22) connected to a pinion (4) designed to mesh with a complementary toothset of the tyre (110), and a mobile arm (6) connecting said motor (2) to the wheelchair (100). The mobile arm (6) allows said motor (2) to be manoeuvred between an engaged position in which the pinion (4) is in contact with the complementary toothset of said tyre (110), a disengaged position in which the pinion (4) is not in contact with the complementary toothset of said tyre (110) and a transport position in which the pinion (4) is distanced from the tyre (110) and retracted beneath the seat (103).

Abstract: An additive manufacturing machine comprises a work surface, a build sleeve (44), and a build platform (46) moving translationally between a raised position and a lowered position under the effect of an actuator (48), the platform being connected to the actuator by a support (50). The build sleeve (44) comprises a slot (66) allowing the support (50) to pass through the build sleeve to connect the platform to the actuator when the build platform translates from its raised position to its lowered position, a closing-off element (68) allowing a slot (66) to be closed off progressively as the platform effects its translational movement inside the sleeve from its raised position to its lowered position, a closing-off element (68) being a tape (70), and the upper end (U70) of a closing-off tape being fixed to the upper edge of the build sleeve or to the work surface.

Abstract: A process for depositing a metal-adhesive, hydrophobic and electrically conductive coating based on electrically conductive microparticles and on a polymer matrix P comprising at least one thermoplastic fluoropolymer P1 and a thermosetting resin P2, comprises: in a first container, dissolve the polymer P1 in an organic solvent; in a second container, disperse the electrically conductive microparticles in an organic solvent; add, in the first container, the thermosetting resin P2 in the liquid state; mix the contents of the containers, then deposit the mixture on the substrate; crosslink the resin P2 and remove the solvents, to obtain a first coating; then impregnate the surface of the substrate with an additional resin solution P2 dissolved in a third solvent, which is a solvent of the resin P2 and a non-solvent of the polymer P1; eliminate the third solvent and crosslink while compressing the additional resin P2 in order to obtain the targeted final coating.

Abstract: A solid composition, of use in particular on any type of metallic substrate as a hydrophobic, electrically conductive, metal-adhesive coating, comprises at least (% by weight of composition): as conductive filler, from 75% to 95% of electrically conductive microparticles, the weight-average size of which is between 1 ?m and 100 ?m; and as hydrophobic, metal-adhesive polymer matrix, from 5% to 25% of a polymer matrix denoted “P”, comprising at least 2 different polymers P1, a thermoplastic fluoropolymer, the weight-average molecular weight of which, denoted “Mw”, is between 100 000 and 1 000 000 g/mol; and P2, a thermoset resin, the glass transition temperature of which is between 30° C. and 150° C. A steel bipolar plate, especially made of stainless steel, for a fuel cell, may be coated with such a composition.

Abstract: A bipolar plate, which forms a first polar plate of a first base element of a fuel cell and a second polar plate of a second base element adjacent to the first base element of the fuel cell, includes two parallel plates. Each plate of the parallel plates includes at least one distribution channel formed in a thickness thereof, for distributing fuel or oxidant. Each distribution channel is arranged so that, when the first and second base elements of the fuel cell are stacked together, a flow channel is formed between the two parallel plates, and the flow channel communicates with a cooling fluid supply opening.

Abstract: An electrical assistance device for a bicycle includes an electrical machine, a drive roller, an actuatable positioner, and a controller. The electrical machine includes a support arm and a rotor shaft, which carries the drive roller via a free wheel. The support arm is mounted on the bicycle by a pivot shaft, which pivots between a drive position and a separated position. The actuatable positioner releasably holds the support arm in the separated position. The controller controls operation of the electrical machine and is able to cause the electrical machine to produce a motive torque in a direction toward a wheel of the bicycle driven in forward movement. The controller also is able to deliver an electrical pulse to the electrical machine to produce a reaction torque in a direction opposite to the motive torque to cause the support arm to pivot, causing actuation of the positioner.

Abstract: A solid composition, of use in particular on any type of metallic substrate as a hydrophobic, electrically conductive, metal-adhesive coating, comprises at least (% by weight of composition): as conductive filler, from 75% to 95% of electrically conductive microparticles, the weight-average size of which is between 1 ?m and 100 ?m; and as hydrophobic, metal-adhesive polymer matrix, from 5% to 25% of a polymer matrix denoted “P”, comprising at least 2 different polymers P1, a thermoplastic fluoropolymer, the weight-average molecular weight of which, denoted “Mw”, is between 100 000 and 1 000 000 g/mol; and P2, a thermoset resin, the glass transition temperature of which is between 30° C. and 150° C. A steel bipolar plate, especially made of stainless steel, for a fuel cell, may be coated with such a composition.

Abstract: A process for depositing, on a substrate, at least the surface of which is at least partially metallic, a metal-adhesive, hydrophobic and electrically conductive coating based on electrically conductive microparticles and on a polymer matrix P comprising at least one thermoplastic fluoropolymer P1 and a thermosetting resin P2 comprises at least the following steps: in a first container, dissolving the polymer P1 in an organic solvent, referred to as first solvent, of this polymer; in a second container, dispersing the electrically conductive microparticles in an organic solvent of the polymer P1, referred to as second solvent, identical to or different from the first solvent; adding, in the first container, the thermosetting resin P2 in the liquid state; mixing the contents of the first and second containers, then depositing the mixture obtained in this way on the substrate; and crosslinking the resin P2 and removing the solvents, in order to obtain the targeted final coating.

Abstract: Bicycle tire (1) comprising a continuous toothing (5) having a substantially radial generatrix (G) with respect to the rotation axis of the tire in the axial direction (YY?), said toothing (5) being positioned circumferentially on an axially outer face (21) of at least one sidewall (2) and comprising an elastomeric material. A retroreflective strip (6) is positioned circumferentially on the sidewall (2), axially on the outside of the axially outer face (21) of the sidewall (2) and radially on the outside of the toothing (5), a strip support (7) is interposed axially between the retroreflective strip (6) and the axially outer face (21) of the sidewall (2), and an axially outer face (71) of the strip support (7), to which the retroreflective strip (6) is applied, forms an angle (A) of at most equal to 30° with the radial direction (ZZ?) of the tire.

Abstract: An electric power-assist device for a bicycle includes an electrical machine with a rotor, a connector structured to attach to the electrical machine, a drive pinion arranged to be driven by the rotor of the electrical machine, and a supporting structure. The drive pinion is structured to mesh tangentially with a complementary toothing integral to a tyre of a rear wheel of the bicycle. The connector is borne by the supporting structure. The connector together with the electrical machine form a sub-assembly that is manually separatable from the supporting structure.

Abstract: An electric power-assist device for a bicycle includes an electrical machine with a rotor, a connector structured to attach to the electrical machine, a battery arranged to power the electrical machine, a controller arranged to control the electrical machine, a drive pinion arranged to be driven by the rotor of the electrical machine, and a supporting structure. The drive pinion is structured to mesh tangentially with a complementary toothing integral to a tire of a rear wheel of the bicycle. The connector is borne by the supporting structure. The supporting structure includes arms attachable to an axle of the rear wheel of the bicycle.

Abstract: A bipolar plate, which forms a first polar plate of a first base element of a fuel cell and a second polar plate of a second base element adjacent to the first base element of the fuel cell, includes two parallel plates. Each plate of the parallel plates includes at least one distribution channel formed in a thickness thereof, for distributing fuel or oxidant. The bipolar plate further includes a manifold to supply fuel and/or oxidant, with the manifold being structured to communicate with an interior portion of the bipolar plate through openings. One of the parallel plates includes a cut-out formed therein, so as to allow a gas located in the manifold to enter the at least one distribution channel via the openings and the cut-out.

Abstract: An electrical assistance device for a bicycle includes an electrical machine, a drive roller, an actuatable positioner, and a controller. The electrical machine includes a support arm and a rotor shaft, which carries the drive roller via a free wheel. The support arm is mounted on the bicycle by a pivot shaft, which pivots between a drive position and a separated position. The actuatable positioner releasably holds the support arm in the separated position. The controller controls operation of the electrical machine and is able to cause the electrical machine to produce a motive torque in a direction toward a wheel of the bicycle driven in forward movement. The controller also is able to deliver an electrical pulse to the electrical machine to produce a reaction torque in a direction opposite to the motive torque to cause the support arm to pivot, causing actuation of the positioner.

Abstract: A supply system of the anode circuit of a fuel cell (1) comprising: a primary fuel tank (2) intended to supply the anode circuit during an operating phase of the fuel cell, a secondary fuel tank (4) intended to supply the anode circuit when the fuel cell is shut down, the primary and secondary tanks are installed so that the secondary tank is recharged with fuel from the primary tank during an operating phase of the fuel cell, and the system further comprises a permeable membrane (6) installed between the secondary fuel tank and the anode circuit of a fuel cell. Also disclosed is a fuel cell system comprising a fuel cell and the described supply system.

Abstract: An electrical assist device is provided for a bicycle. The device includes an electric machine, a drive pinion, an attachment device, a source of electrical energy, and a controller. The attachment device fixes the electric machine to the bicycle near a tire of a wheel of the bicycle. The source of electrical energy powers the electric machine. The controller controls the electric machine. The electric machine includes a rotor, which drives the drive pinion. The drive pinion includes teeth structured to mesh tangentially with complementary teeth fastened to the tire.

Abstract: An electrical assist device is provided for a bicycle. The device includes an electric machine, a drive pinion, an attachment device, a source of electrical energy, and a controller. The attachment device fixes the electric machine to the bicycle near a tire of a wheel of the bicycle. The source of electrical energy powers the electric machine. The controller controls the electric machine. The electric machine includes a rotor, which drives the drive pinion. The drive pinion includes helicoidal teeth structured to mesh tangentially with complementary teeth fastened to the tire.