Abstract: A method includes providing a metal ring and pastelessly slide-grinding at least one surface of the metal ring with grinding bodies, preferably until a predefined surface topography of the metal ring is achieved, which surface topography preferably has an Rsk value that is greater than or equal to ?0.25 and/or an Rk value between 0.3 and 1.35 and/or Rpk value between 0.05 and 0.4 and/or an Rvk value between 0.2 and 1.2 and/or an Ra value between 0.1 and 0.4.

Abstract: The invention provides a tensioning device having a traction element and a body. The traction element includes a first lower portion of the traction element that resides in a tie-rod that is able to interlock with a threaded rod and a second upper portion of traction element that resides in a piston, the first and second portions of traction element being integral in displacement. The traction element is axially moveable in a bore of the body and co-axially mounted around the traction element, the body providing a first lower portion of the body that resides in a tubular support sleeve and a second upper portion of body that resides in a cylinder. An annular chamber is formed between the traction element and the body and intended to receive a pressurized fluid.

Abstract: A method for manufacturing at least one synchronizing ring includes providing a rough-turned blank made from a hardenable material that is in a not-hardened state and laser-cutting the rough-turned blank to form the at least one synchronizing ring, the laser cutting being performed with an energy chosen to be sufficient to selectively harden at least a portion of the material in a region along which the laser cutting occurs.

Abstract: The invention provides a tensioning device having a traction element and a body. The traction element includes a first lower portion of the traction element that resides in a tie-rod that is able to interlock with a threaded rod and a second upper portion of traction element that resides in a piston, the first and second portions of traction element being integral in displacement. The traction element is axially moveable in a bore of the body and co-axially mounted around the traction element, the body providing a first lower portion of the body that resides in a tubular support sleeve and a second upper portion of body that resides in a cylinder. An annular chamber is formed between the traction element and the body and intended to receive a pressurized fluid.

Abstract: This method is for manufacturing a rolling bearing having a rotatable ring, a non-rotatable ring, rolling bodies and a flange coupled with a first ring amongst the rotatable ring and non rotatable ring. This method includes at least the following steps: forming the rings and the flange as three independent parts, immobilizing a weldable insert onto the first ring, by electro magnetic pulse technology (EMPT) or by capacitor discharge welding (CW), and welding together the insert and the flange or the insert and a flange holding member. The rolling bearing includes the insert immobilized on the first ring by magnetic pulse welding (MPW), magnetic pulse forming (MPF) or by capacitor discharge welding (CDW). Moreover, the flange or a flange holding member is welded on the insert.

Abstract: A vehicle transmission includes a housing part, a shaft extending from the housing part, and a spring element having a plurality of spring windings wound around the shaft, a first end of the spring element being fixed to the housing part. An actuating means is attached to a second end of the spring element and is configured to twist the second end in a circumferential direction of the spring element to thereby cause the spring element to tighten and frictionally contact an outer circumference of the shaft. The spring element is comprised of a hollow cylindrical metal base body having a helical-shaped incision that defines the plurality of spring windings. The incision may be formed in the hollow cylindrical base body by a plasma beam process, by a laser cutting process, by a flame cutting process or by a water jet cutting process.

Abstract: A method for manufacturing at least one synchronizing ring includes providing a rough-turned blank made from a hardenable material that is in a not-hardened state and laser-cutting the rough-turned blank to form the at least one synchronizing ring, the laser cutting being performed with an energy chosen to be sufficient to selectively harden at least a portion of the material in a region along which the laser cutting occurs.

Abstract: A torque transmission mechanism, for a starter for an internal combustion engine, is adapted to transmit a starting torque from a starter motor to a crankshaft. The torque transmission mechanism comprises a ring gear that transmits the starting torque and a one-way clutch disposed between the ring gear and the crankshaft, this ring gear comprising a gear side portion to which the starting torque is transmitted from the starter motor via gear mesh, and a flange extending between the gear side portion and an inner ring of the one-way clutch. The flange comprises an inner section which forms the inner ring of the one-way clutch and an outer section fixed to the inner section and on which the gear side portion is fixed. The inner and outer sections of the flange are fixed together by a mechanical assembly other than welding.

Abstract: A torque transmission mechanism for an internal combustion engine, adapted to transmit a starting torque from a starter motor to a crankshaft of the internal combustion engine. The torque transmission mechanism includes a ring gear that transmits the starting torque, a one-way clutch disposed between the ring gear and the crankshaft, a bearing including a first ring coupled in rotation with the gear ring and a second ring coupled in rotation with the crankshaft and a front plate for coupling in rotation the crankshaft with the one-way clutch. The front plate is coupled in rotation with the crankshaft via the second ring of the bearing, by welding along a direction parallel to a central axis of the second ring of the bearing.

Abstract: A method for manufacturing a torque transmission mechanism between a starter motor and a crankshaft of an internal combustion engine, comprising a one-way clutch including an outer ring fast in rotation with the crankshaft via a front plate. This method comprises the following steps: a) forging the outer ring out of carburizing steel, b) carburizing the outer ring, c) tempering the outer ring, d) grinding an inner surface of the outer ring, e) manufacturing the front plate out of standard low equivalent carbon content steel, and f) assembling the front plate and the outer ring.

Abstract: The ball and ramp device for a toroidal variator includes a first disc and a second disc and a plurality of rolling elements disposed between ramps provided on the discs and extending along the circumferential direction. One of the discs provides a plate having the ramps, a ring delimiting an outer toroidal raceway and an intermediate supporting part axially interposed between said ring and the plate.

Abstract: A vehicle transmission includes a housing part, a shaft extending from the housing part, and a spring element having a plurality of spring windings wound around the shaft, a first end of the spring element being fixed to the housing part. An actuating means is attached to a second end of the spring element and is configured to twist the second end in a circumferential direction of the spring element to thereby cause the spring element to tighten and frictionally contact an outer circumference of the shaft. The spring element is comprised of a hollow cylindrical metal base body having a helical-shaped incision that defines the plurality of spring windings. The incision may be formed in the hollow cylindrical base body by a plasma beam process, by a laser cutting process, by a flame cutting process or by a water jet cutting process.

Abstract: Turbocharger comprising a shaft, a housing, a turbine wheel and a compressor wheel mounted onto the shaft, at least one rolling bearing located between the shaft and the housing and comprising an inner ring, an outer ring and at least one row of rolling elements between raceways provided on the rings. Said turbocharger comprises at least one intermediate sleeve radially located between the shaft and the inner ring of the rolling bearing.

Abstract: Turbocharger comprising a shaft, a housing, a turbine wheel and a compressor wheel mounted onto the shaft, at least one rolling bearing located between the shaft and the housing and comprising an inner ring, an outer ring and at least one row of rolling elements between raceways provided on the rings. The turbocharger comprises at least one insulation means radially located between the inner ring and the shaft, so as to thermally isolate the inner ring from the shaft.