Abstract: A tension device for belts and chains with a tension arm (1) rotatably supported relative to a stationary machine element (6) and spring-loaded by means of a spring (12) against the traction means, on which tension arm, tension means, in particular a tension roller (2), are provided for bearing against the traction means, between the stationary machine element (6) and an element (7), disposed fixedly on the tension arm, are disposed in series a friction element (10) and a resiliently deformable spring element (11), and the resilient deformation of the spring element (11) is limited by the static friction acting between the element (7) fixedly disposed on the tension arm, and the stationary machine element (6) which avoids impermissibly high belt tensions and undesirably high tension arm excursions.

Abstract: A device for the simultaneous actuation of two gas exchange valves (10) of an internal combustion engine by a camshaft (11) rotatably supported in a camshaft bearing (15,16), said device comprising a bridge (3) which, with the interposition of hydraulic valve clearance compensation elements (7), is in contact with valve shaft ends (9) of the gas exchange valves (10), and a guide rail (2) on which the bridge (3) is guided for longitudinal displacement by a linear bearing (5), said guide rail (2) comprising a first oil duct (18) which opens into the linear bearing (5) and a second oil duct (22) implemented in the bridge (3), which connects the valve clearance compensation elements (7) to the linear bearing (5), and the oil passes phase-wise from the first oil duct (18) into the second oil duct (22), characterized in that a third oil duct (21) branches from the first oil duct (18) and opens into the camshaft bearing (15,16).

Abstract: A device for the simultaneous actuation of two gas exchange valves (2) of an internal combustion engine comprising a bridge (6) guided movably along a guide rail (8) which, with the interposition of hydraulic valve clearance compensation elements (4), is connected with valve shaft ends (3) of the gas exchange valves (2), a camshaft (16) rotatably supported in the cylinder head (1) by at least one camshaft bearing (15), comprising a bearing block (23) and a bearing cap piece (14) detachably connected thereto and an engine element (12) supporting the guide rail (8) at an upper end thereof, characterized in that the engine element (12) is implemented in one piece with the bearing block (23) and/or the bearing cap piece (14).

Abstract: The invention concerns a linear bearing element mounted on the running race of a guide rail and comprising, on at least one of its two front ends, a wiper which bears by an end region against the running face to retain lubricant in the linear bearing element, at lease one lubricant supply device, with its inlet end connected to an outer supply duct and its outlet, end connected with the bearing region being arranged on or in the bearing element.

Abstract: An overrunning clutch (1) provided with a bushing (2) which is open at one end and partially closed at the opposite end and into which are inserted firstly a cage (5) guiding latching needles (3) and comprising at least one flange and clutch springs (4), and secondly a slide ring (6) arranged on one end of the cage (5), the axial width of the bushing (2) overlapping the cage (5) and the slide ring (6), characterized in that the flange (9) of the cage (5) is positively and releasably coupled with a flange (13, 13d) of the bushing (2).

Abstract: A device for angular adjustment between at least two shafts, a crankshaft and a cam shaft, in driving relationship in an internal combustion engine, comprising an adjusting element arranged in a region of a cylinder head and connected to the camshaft while being arranged in an axial direction thereof, the adjusting element comprising a piston which is displaceable between two substantially circular ring-shaped pressure chambers which are connected to a source of pressure medium, characterized in that a separate oil distributing element (16) is rigidly integrated in a cap (27) of the adjusting element (3) arranged at a front end of the camshaft (5) and said oil distributing element (16) comprises ducts (6,7) for pressure medium supply oriented towards the piston (14) which comprises two piston areas of identical dimensions.

Abstract: A rolling bearing for mounting a crankshaft (1) in a crankcase (6) of an internal combustion engine comprising a bearing housing (4), between which housing (4) and a journal of the crankshaft (1), rolling elements (18) roll on raceways (19), the bearing housing (4) being split radially into two semi-shells (7,8) which can be connected to each other by screws (11), characterized in that a radially outer rolling element raceway (19) is formed directly on the semi-shells (7,8) and an outer peripheral surface of the semi-shells (7,8) comprises at least one fitting surface (9) extending parallel to a longitudinal central plane of the screws (11), by which fitting surface (9) the semi-shells (7,8) are guided in a preferably fork-shaped seat (5) formed in the crankcase (6), the semi-shells (7,8) being jointly held on the crankcase (6) by screws (11).

Abstract: A free-running roller coupling transmits in both directions of rotation a torque between two structural members. This coupling has an outer ring in which clamping tracks are formed by recesses. An inner element has a cylindrical clamping track. Pairs of clamping rollers, prestressed by a pressure spring against the ramp-like end of each clamping track, are arranged between the clamping track of the inner element and the clamping tracks of the outer ring. An unblocking arrangement has comb-like carriers that extend through slots in an edge of the outer ring, which carriers can unblock the rollers while allowing the outer ring to be driven by a switching sleeve.

Abstract: A needle roller bearing (1) comprising an outer bearing ring (6), an inner bearing ring (8) arranged on a shaft (3) and needle rollers (9) which roll on mutually facing peripheral surfaces of said outer and inner bearing rings (6,8), characterized in that at one axial end, the outer bearing ring (6) and the inner bearing ring (8) comprise radially overlapping flanges (11,12) located axially next to each other with an axial sliding ring (13) arranged therebetween which bears against mutually facing end faces of said flanges (11,12) and, together with these flanges (11,12) and a peripheral surface of one of the bearing rings (6), defines a pressure chamber (15), pressure oil from the interior of the bearing penetrating into this pressure chamber (15) and flowing from there with a clear loss of pressure out of the needle roller bearing (1) by passing between at least one of said end faces of the flanges (11,12) and the axial sliding ring (13).

Abstract: In a zero-clearance radial ball bearing, two outer bearing race sections (4, 5) made by non-cutting methods together support an outer race (2) while between it and a concentric inner race (3) run bearing balls (1). Against the first bearing race section (4) bears a sleeve section (7) which circumferentially and axially surrounds the second race section (5). A spring component (10) pressing the two race section (4, 5) together acts between the sleeve section (7) and the second bearing race sections (5) in such a way that the balls (1) run with zero clearance. In order to improve the rigidity of such a radial ball bearing and especially the sleeve section (7), it is proposed that the two axial ends of the sleeve section (7) project axially beyond the balls (1).

Abstract: The invention relates to a tensioning system for a belt or chain drive. Tensioners are known in which there are plastic friction bushes to damp oscillations where the coefficient of friction is adversely affected by temperature effects. It is the purpose of the invention to provide a tensioning system in which the friction coating retains a virtually constant frictional torque throughout its useful life. To this end, according to the invention there is a basic component (2) in which against a base (5) in the shape of a circular disc bears a friction coating (18) on which is supported a friction disc (10) which is secured against rotation by means of a shaft (7), to the tensioner (9) producing the oscillating movement.

Abstract: A tappet (1) for a valve operating mechanism for an internal combustion engine comprising a thin-walled jacket (3) guided in a bore (5) of a cylinder head (6) and provided in the cam direction with a circular ring-shaped bottom (4) which surrounds a circular bottom (16) of a concentrically arranged guide sleeve (7) in whose bore (9) a clearance compensation element (10) is arranged for longitudinal displacement, the jacket (3) comprising the circular ring-shaped bottom (4) and the guide sleeve (7) comprising the circular bottom (16) being engageable by cams of differing pitch and relatively displaceable axially with respect to each other and with respect to the bore (5) of the cylinder head (6), and a first, central cam (14) of smaller pitch and at least one cam (15) of larger pitch selectively engaging the circular bottom (16) and the circular ring-shaped bottom (4) respectively, characterized in that means are arranged in the jacket (3) which prevent an axial rotation of the tappet (1) in the bore (5) of th

Abstract: A tappet for the valve drive of an internal combustion engine comprising a hollow cylindrical housing arranged with its thin-walled jacket for axial displacement and a receiving bore of a cylinder head which is optimized with respect to its reliability and its operating weight while at the same time, using a thin-walled element to delimit the annular oil reservoir by a reliable manufacturing method.

Abstract: A tensioning device (1) for belt or chain drives comprising a tension arm (3) which carries a tension roller (4) on one end and is mounted at a second end for rotating together with a shaft (6) in a housing (2) while being resiliently supported on the housing (2) by a torsion spring (16), the tensioning device (1) further comprising a friction disk (10) which is rigidly connected to the shaft (6) or the tension arm (3), a friction lining (15,24,27) being arranged between a friction surface (10a) of the friction disk (10) and an axial contact surface (14) of the housing (2), characterized in that the contact surface (14) comprises a means (23,25,28) which engages the friction lining (15,24,27) by positive and/or force engagement and prevents any rotation of said friction lining (15,24,27) with respect to the contact surface (14).

Abstract: In a roller bearing (1) for the straightline movement of a supporting component (2) along a guide rail (6), the quantity of re-lubrication is to be minimized regardless of the installation position of the roller bearing (1). This is acheived by the invention in that a separate lubricant line (13) is inserted in a channel (10) of a head (8) for the lubricant supply which takes the form of a single-lipped seal (16) in a region in which lubricacant exiet points are desired.

Abstract: A bearing (1) for the wheel suspension strut of a motor vehicle has an inner and an outer bearing ring (2, 3). The inner bearing ring (2) radially encloses a clearance ring (5) concentrically arranged in its bore (4). A bearing housing (8) made of deep-drawn sheet metal encloses the outer bearing ring (3). In order to reduce the total mass of the bearing and to allow it to be easily linked to a neighboring part of the car body, the bearing housing (8) forms a single piece with a flange (9) that extends essentially transversely to the bearing axis (10). The flange has at least one bore and screw (12, 13) for securing the suspension strut bearing (1) to a neighboring part of the car body.

Abstract: A cold strip for manufacturing deep-drawn, case-hardened precision components, particularly rolling bearing and engine components, in which a core material (2) is roll clad at least on one side with a cladding material (3), characterized in that the core material (2) is a low-carbon cold or hot steel strip and the cladding material (3) is a cold or hot strip with increased carbon content, the core (2) and the cladding material (3) having different physical and chemical properties which complement each other, particularly with regard to deep-drawability, hardenability, constant reverse-bend fatigue strength and wear resistance.

Abstract: A tappet (2) has a hydraulic clearance compensating element (8) composed of a high pressure chamber (18), a housing (3) with a spring-loaded, longitudinally movable compensating piston (15) and a free piston (11) with a smaller diameter than the compensating piston (15). In order to obtain by simple manufacturing means a reduced elasticity in valve operation during the base circle phase of a cam (6), the ratio between the projected surface (20) of the compensating piston (15) that faces the high pressure chamber (18) and the projected surface (19) of the free piston (11) that faces the high pressure chamber (18) is higher than 3.

Abstract: A locking element freewheel comprising an outer race ring (1) and an inner race ring (2) with cylindrical and mutually concentric locking surfaces (7,8) between which tiltably suspended locking elements (5) are guided in a cage (6) wherein the central portion of the locking surfaces (7,8) of the outer race ring (1) or inner race ring (2) has a smaller or larger diameter than the ends thereof. If, due to differing wall thicknesses, the race rings (1,2) have differing rigidity, the edge region of highest rigidity of the locking surfaces (7,8) of the outer race ring (1) and/or inner race ring (2) has a larger or smaller diameter and by such a profiling of the locking surfaces, an overloading at the edges of the locking elements is prevented.

Abstract: A pulser ring made of a ferritic iron alloy with the following composition (in wt. %)max. 0.12% C,max. 1.00% Si,max. 1.00% Mn,max. 0.045% P,max. 0.030% S andmax. 18% Cr, with the rest being iron with impurities conditional upon the melting process and a method of heat treating the same.