Abstract: A sail propulsion element comprises a mast (3), an inflatable or non-inflatable sail (1) consisting essentially of two substantially fluidtight adjacent surfaces (5) joined together along their periphery, thus forming at least one closed cavity between them, an air conduit positioned between the inside and the outside of the cavity, at least one means for injecting air into the cavity, the sail once inflated having a profile that remains permanently symmetrical, irrespective of the movement of the propulsion element, or of the direction or strength of the wind, a headboard (10), and a sail receptacle (11). The mast is located forward of the center of aerodynamic thrust of the sail, the mast is or is not free to rotate by 360°, and the sail comprises at least one means maintaining a slight pressure in the sail.

Abstract: A sail-propulsion element comprises a mast (3), an inflatable sail (1) consisting essentially of two substantially fluidtight adjacent surfaces (4a, 4b) joined together along their periphery, thus forming between them at least one cavity closed around the mast (3), at least one air conduit positioned between the inside and the outside of the cavity, at least one means for injecting air into said cavity, the sail once inflated having a profile that remains permanently symmetrical, irrespective of the movement of said propulsion element, or of the direction or strength of the wind, a headboard, and a sail. The sail comprises a plurality of cells (5) in the direction of the span of the sail, each cell (5) extending from the leading edge (6) to the trailing edge (7), said cells (5) being spaced apart by ribs made of a first soft material.

Abstract: A sail propulsion element comprises a mast (3), an inflatable sail (1) consisting essentially of two substantially fluidtight adjacent surfaces (5) joined together along their periphery, thus forming at least one closed cavity, at least one air conduit positioned between the inside and the outside of the cavity, at least one means for injecting air into the cavity, the sail once inflated having a profile that remains permanently symmetrical, irrespective of the movement of the propulsion element, or of the direction or strength of the wind, a headboard (10), a sail receptacle (11), and at least one guide line (12) positioned in the closed cavity of the sail, for the maneuvers of hoisting and dropping the sail, the guide line extending from a leading edge (8) to a trailing edge (9) of the sail, passing through the headboard (10) and the sail receptacle (11).

Abstract: A vehicle with total or partial sail propulsion comprises a hull (j), at least one sail, inflatable or not, at least one self-supporting mast (l) having a vertical axis, the mast comprising a fixed part (o) disposed at hull level and a movable part (p) that can move about the vertical axis. This vehicle is characterized in that the mast (l) comprises, in the fixed part (o), sensors for measuring physical parameters intended to supply digital data on the thrust force, the drift force, and the differential pressure of the sail, or else, in the movable part (p), sensors for measuring physical parameters intended to supply digital data on the aerodynamic thrust force projected in the axis of the sail, the aerodynamic thrust force projected in the axis at right angles to the sail, and the differential pressure of the sail.

Abstract: A wheel drive system for ground movement of an aircraft includes a motor system and a clutch system. The motor system, which is borne by an unsuspended part of a landing gear strut of the aircraft, includes an electric motor and a reduction gearing system. The clutch system, which connects an output shaft of the electric motor to a wheel of the aircraft via the reduction gearing system, includes a dog-clutch and a translational movement system. The dog-clutch includes a drive part, which is secured to the motor system, and a receiving part, which secures to a rim of the wheel. The translational movement system moves the drive part along an axis of an axle crossbeam of the landing gear strut into an engaged position, in which the drive part collaborates with the receiving part, and a disengaged position, in which the drive part is separated from the receiving part.

Abstract: A wheel drive system for ground movement of an aircraft includes a motor system and a clutch system. The motor system, which is borne by an unsuspended part of a landing gear strut of the aircraft, includes an electric motor and a reduction gearing system. The clutch system, which connects an output shaft of the electric motor to a wheel of the aircraft via the reduction gearing system, includes a dog-clutch and a translational movement system. The dog-clutch includes a drive part, which is secured to the motor system, and a receiving part, which secures to a tire of the wheel. The translational movement system moves the drive part along an axis of an axle crossbeam of the landing gear strut into an engaged position, in which the drive part collaborates with the receiving part, and a disengaged position, in which the drive part is separated from the receiving part.

Abstract: A wheel motorization system, useable for an aircraft to run along a ground surface, includes an electric motor, a driving member securable with a hub of a wheel of the aircraft, and a clutch device connecting an output shaft of the motor to the driving member via a reduction device. The clutch device includes a freewheel device, which allows transmission of a rotational torque only in a first torque transmission direction when the aircraft is travelling forwards.

Abstract: Wheel drive system, particularly for the ground circulation of an aircraft comprising a motor unit (22) borne by an unsuspended part (14b) of a landing gear strut (14) of the aircraft and comprising an electric motor (26) and reduction means, and a clutch device (24) connecting the output shaft (26a) of the electric motor (26) to the wheel (12) via the reduction means. The clutch device (24) comprises a dog-clutch mechanism (32, 34) comprising a drive part (32) secured to the motor unit (22) and a receiving part (34) secured to the tire (12a) of the wheel (12), and a system for the translational movement, along the axis of the axle crossbeam (20) of the landing gear strut (14), of the drive part (32) into an engaged position in which the drive part (32) collaborates with the receiving part (34) and a disengaged position in which the drive part (32) is separated from the receiving part (34).

Abstract: Wheel drive system, particularly for the ground circulation of an aircraft comprising a motor unit (22) borne by an unsuspended part (14b) of a landing gear strut (14) of the aircraft and comprising an electric motor (26) and reduction means, and a clutch device (24) connecting the output shaft (26a) of the electric motor (26) to the wheel (12) via the reduction means. The clutch device (24) comprises a dog-clutch mechanism (32, 34) comprising a drive part (32) secured to the motor unit (22) and a receiving part (34) secured to the rim (12b) of the wheel (12), and a system for the translational movement, along the axis of the axle crossbeam (20) of the landing gear strut (14), of the drive part (32) into an engaged position in which the drive part (32) collaborates with the receiving part (34) and a disengaged position in which the drive part (32) is separated from the receiving part (34).

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.

Abstract: The invention concerns in particular an electrical assist device for a bicycle, said device comprising: an electric machine (2) comprising a rotor, a drive pinion (3) driven by the rotor of the electric machine, fixing means (4) for fixing the electric machine to the bicycle (1) in the vicinity of a tyre (5) of a wheel (61; 62) of said bicycle, a source (7) of electrical energy for powering the electric machine, means (8) for controlling the electric machine, characterized in that the drive pinion includes teeth (31) intended to mesh tangentially with complementary teeth (51) fastened to said tyre (5).

Abstract: The invention concerns in particular an electrical assist device for a bicycle, said device comprising: an electric machine (2) comprising a rotor, a drive pinion (3) driven by the rotor of the electric machine, fixing means (4) for fixing the electric machine to the bicycle (1) in the vicinity of a tyre (5) of a wheel (61; 62) of said bicycle, a source (7) of electrical energy for powering the electric machine, means (8) for controlling the electric machine, characterized in that the drive pinion includes teeth (31) intended to mesh tangentially with complementary teeth (51) fastened to said tyre (5), the teeth (31) of the drive pinion being helicoidal teeth.

Abstract: Wheel motorization system, notably for an aircraft running along the ground, comprising an electric motor (5), a driving member (6) integral with the hub (7) of the wheel (2), a clutch device (10) connecting the output shaft (5a) of the motor (5) to the driving member (6) via reduction means (20). The clutch device (10) comprises a freewheel device (12) allowing transmission of the rotational torque only in a first torque transmission direction when the aircraft is travelling forwards.

Abstract: A motorizing system is provided for powering a wheel associated with a suspension of an aircraft, so that the aircraft can be moved around on ground. The motorized system includes a motor unit, a drive member that is structured to be secured to the wheel, and a clutch device that connects an output shaft of the motor unit to the drive member. The motor unit is structured to be secured to a sprung part of a suspension strut. A positive transmission occurs between the motor unit and the drive member.

Abstract: The invention relates to a system for motorizing a wheel (2), the system comprising a motor unit (4), a drive member (6) secured to the wheel (2) and a clutch device (7) connects the output shaft (8) of the motor unit (4) to the drive member (6). According to the invention, the motor unit (4) comprises an electric motor (11) and is carried by an un-sprung part of a suspension strut (3) of an aircraft so that the latter can be made to move along the ground.

Abstract: A tank (1) for storing fluid under high pressure, of cylindrical overall shape and round cross section comprising at each of its ends along its axis (2), a metal end piece (3, 4), a liner (6) enveloping the said end pieces, and a structural layer (7) of fiber impregnated with thermosetting resin enveloping the said liner.

Abstract: The invention relates to a system for motorizing a wheel (2), the system comprising a motor unit (4), a drive member (6) secured to the wheel (2) and a clutch device (7) connects the output shaft (8) of the motor unit (4) to the drive member (6). According to the invention, the motor unit (4) comprises an electric motor (11) and is carried by an unsprung part of a suspension strut (3) of an aircraft so that the latter can be made to move along the ground.

Abstract: The invention relates to a motorizing system for powering a wheel (5) associated with a suspension, the system comprising a motor unit (3) and a drive member (4) secured to the wheel (5). According to the invention, the motor unit is secured to the sprung part of the suspension strut (2) and a clutch device (6) connects the output shaft (7) of the motor unit (3) to the drive member (4).

Abstract: A tank (1) for storing fluid under high pressure, of cylindrical overall shape and round cross section comprising at each of its ends along its axis (2), a metal end piece (3, 4), a liner (6) enveloping the said end pieces, and a structural layer (7) of fibre impregnated with thermosetting resin enveloping the said liner.