Abstract: The invention concerns a clutch release bearing comprising an axially mobile piston (14), and a ring (26I), integral with a raceway (C1), hooked on the piston (14) with axial-effect squeezing elastic means (38, 40). The ring (26I) is provided with a proximal surface (F1, 62) and a distal surface (F2, 70) arranged axially behind the proximal surface (F1, 62). The proximal surface (F1, 62) is supported on a first hooking surface (A1, 64) provided in the piston (14). The squeezing means (38, 40) are supported on the distal surface (F2, 70) of the ring (26I) and a second hooking surface (A2, 76) provided in the piston (14). The first (A1, 64) and second (A2, 76) hooking surfaces provided in the piston (14) are arranged axially in front of the distal surface (F2, 70) of the ring (26I) The invention also concerns a method for assembling the elements of said clutch release bearing.

Abstract: The invention concerns a clutch release bearing comprising an axially mobile piston (14), and a ring (26I), integral with a raceway (C1), hooked on the piston (14) with axial-effect squeezing elastic means (38, 40). The ring (26I) is provided with a proximal surface (F1, 62) and a distal surface (F2, 70) arranged axially behind the proximal surface (F1, 62). The proximal surface (F1, 62) is supported on a first hooking surface (A1, 64) provided in the piston (14). The squeezing means (38, 40) are supported on the distal surface (F2, 70) of the ring (26I) and a second hooking surface (A2, 76) provided in the piston (14). The first (A1, 64) and second (A2, 76) hooking surfaces provided in the piston (14) are arranged axially in front of the distal surface (F2, 70) of the ring (26I) The invention also concerns a method for assembling the elements of said clutch release bearing.

Abstract: The clutch release device comprises an outer body (32), a mock cavity (36) that is radially defined on the outside by an outer tube (68) comprising a liquid feed inlet (42) for a chamber (36) that is joined to a feed pipe which communicates with a bore hole (72) pertaining to the outer body (32), whereby the orientation thereof is generally radial and the location thereof is opposite an feed inlet (42) for the outer tube, via an added tight tubular element (79) that is mounted in the bore hole (70); the radially outer end (102) of the tubular element (78) is also mock and the feed duct (26) is connected to a hole (100) in the outer body (32, 94) that discharges transversally into the bore hole (72) to the right of a passage (108) that is formed in the wall (106) of the tight tubular element (78).

Abstract: A hydraulic receiver for clutch control having a fixed part including an internal guide tube and a concentric external body defining a blind annular cavity supplied with fluid. A piston carrying a drive element for engaging a declutching device is mounted inside the blind annular cavity.

Abstract: A device comprising an outer body (6) integral with a guide tube (4) defining on its own a blind ring-shaped cavity (40) axially oriented wherein a piston (3) moves guided by the guide tube (4). The guide tube (4) is produced by impact extrusion. The invention is applicable to motor vehicles.

Abstract: A receiver comprises an external body (5) having a thrust face (166) and a centring surface (167), and a concentric internal tube (6) with a flange (61) in contact with the thrust face (166), the centring surface (167) being part of a portion (153) of increased thickness which has a shoulder (195) formed by deformation so as to trap and grip, between the latter and the thrust face (166), an intermediate member (95) and the outer periphery of the flange (61).

Abstract: A clutch release bearing comprising a fixed portion (5, 6) including an outer body (5) and an inner support tube (6) concentric therewith and separated therefrom, and defining an axially extending blind ring-shaped cavity (50) capable of being supplied with a fluid and housing an axially movable tubular piston (4) supporting a drive member (3) engageable with the diaphragm (13) of a clutch (1). The rear end (100) of the support tube (6) has a transversely extending ring-shaped flange (61) by means of which it engage a fixed portion (21), particularly the gearbox, and the rear end of the body (5) is recessed for clamping the flange (61) between the body (5) and the fixed portion (21).

Abstract: A disengagement device includes a clutch release bearing, provided with a fixed part (2, 4) comprising an outer body (2) and an inner support tube (4) defining an axially oriented blind annular cavity (40) able to be fed with fluid and inside which a piston (3) is mounted so as to be axially mobile, a sole plate is able to be fixed to a fixed part and mounting means of the bayonet type (6) act between the said sole plate (5) and the outer body (2) of the clutch release bearing (1) for bayonet-type mounting of the clutch release bearing (1) on the sole plate (5) previously fixed to the said fixed part (7).

Abstract: A torsion damper includes a predamper having an input part which is coupled in rotation to the damper plate of a main damper, together with an output part which is coupled in rotation to an output element of the main damper. A control ring is interposed axially between the input part of the predamper and the main damper plate. The control ring has an abutment for cooperation with at least one of the lateral edges of a first window (12) formed in one of the guide rings of the main damper.

Abstract: A fluid pressure operated clutch release bearing for a diaphragm clutch of a motor vehicle includes a fixed part which comprises a cylindrical annular external body and an internal tube. The body and tube together define an annular cavity, into which pressurised fluid is fed for controlling the release bearing by actuation of a tubular piston, which slides axially in the cavity and which has a front end portion that carries an actuating element which acts on the clutch diaphragm. This front end portion also carries a finned sealing ring which cooperates with the outer peripheral surface of the tube, so as to restrict leakage of fluid through the annular space which is defined between the outer surface of the tube and the internal bore of the piston; and the piston has at least one evacuation orifice which connects the annular space to a zone in which leaked fluid can be recovered.