Patents Assigned to Fichtel & Sachs
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Patent number: 5579881Abstract: A friction clutch with a cup spring which is actuated by a clutch release element similar to a membrane spring. A compact and simple construction can thereby be achieved with a very flat spring characteristic, whereby the clutch release element can be tuned so that it causes a significant reduction of the clutch release forces.Type: GrantFiled: July 14, 1994Date of Patent: December 3, 1996Assignee: Fichtel & Sachs AGInventor: Reinhold Weidinger
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Patent number: 5580079Abstract: A hydraulic rotary actuator within a stabilizer system divided into two parts is taught. A first stabilizer part is non-rotationally connected to a rotary actuator vane assembly, and a second stabilizer part is non-rotationally connected to a rotary actuator housing. The rotary actuator housing has hydraulic connections for hydraulic lines which form a flow connection to a hydraulic system. The two stabilizer parts can be rotated with respect to one another by the rotary actuator. The segments of the hydraulic lines which are connected to the rotary actuator, and are subject to possible deformation, are located in a plane which lies essentially perpendicular to the axis of rotation of the rotary actuator.Type: GrantFiled: October 28, 1994Date of Patent: December 3, 1996Assignee: Fichtel & Sachs AGInventors: Robert Pradel, Stefan Schiffler
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Patent number: 5579880Abstract: Friction clutch, in particular for motor vehicles, consisting of a driving portion as a counterpressure plate, a pressure plate oriented so that it can move axially but not rotationally with respect to the counterpressure plate, a clutch plate with clutch linings which can be fixed between the two and which is located non-rotationally on a drive shaft, whereby the clutch plate is provided if necessary with a load and/or idle damper, whereby there are also pressure elements for the clutch plate and/or the damper. On such a friction clutch, the object of the invention is to realize different, predetermined moments of friction with the identical geometry of the friction device. The invention teaches that this object can be achieved by providing as the pressure element at least one permanent magnet and/or at least one magnet system and/or at least one electrically energized magnetic circuit.Type: GrantFiled: July 18, 1994Date of Patent: December 3, 1996Assignee: Fichtel & Sachs AGInventors: Reinhard Feldhaus, Matthias Fischer, Joachim Lindner
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Patent number: 5575363Abstract: A hydrokinetic torque converter with a lock-up clutch which is located axially between the turbine wheel and the converter housing comprises a piston which, along with the converter housing, defines a chamber. The chamber is connected by means of at least one essentially radial flow guide to a longitudinal hole in the driven shaft. When oil which has been supplied by the converter circuit and has penetrated into the chamber in the vicinity of the friction lining flows through the chamber, the oil can be transported radially inward for discharge by means of the flow guide toward the converter axis, until it can be introduced into the driven shaft inside a ring-shaped zone surrounding the converter-axis which promotes the formation of a vortex when the converter housing is in rotation, and can then be transported via the longitudinal hole in the driven shaft to the reservoir.Type: GrantFiled: December 19, 1994Date of Patent: November 19, 1996Assignee: Fichtel & Sachs AGInventors: Uwe Dehrmann, Peter Volland, Wolfgang Kundermann, Hans W. Wienholt, Ruthard Knoblach, Herbert Schmid
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Patent number: 5575182Abstract: A dual-mass flywheel comprises a primary mass (7) which is adapted to be fastened to a crankshaft (3) of an internal-combustion engine concentric to an axis of rotation (1) and a secondary mass (9) which is mounted for rotation relative to the primary mass (7) around the axis of rotation (1). The secondary mass (9) is coupled in a rotationally elastic manner to the primary mass (7) by a torsion-damping arrangement (19). The primary mass has two formed sheet-metal parts (35, 37) which define a cavity (47) to accommodate springs (17) of the torsion-damping arrangement (19) and is provided with supplementary masses in order to increase the moment of inertia. The supplementary masses may be made up of extensions (45, 63) of the formed sheet-metal parts (35, 37) or of additionally welded-on mass-rings (67). In particular, the supplementary masses are located in a region which is generally radially outwardly of the secondary mass (9).Type: GrantFiled: May 24, 1995Date of Patent: November 19, 1996Assignee: Fichtel & Sachs AGInventors: Bernhard Schierling, Hilmar Gobel, Georg Kraus, Bernd Stockmann
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Patent number: 5575360Abstract: Pneumatic spring comprising an elastic rolling bellows connected to a tubular body. The elastic rolling bellows, together with an essentially rigid external tube, forms a spring chamber. A bellows fastening is disposed between the rolling bellows and the external tube, whereby the rolling bellows are inserted into the external tube in a fastening segment, and are held in place by means of a retaining ring. The retaining ring, by means of its inner surface can act as a guide with respect to the rolling bellows connected to the tubular body, so that the external tube is kept at a distance with respect to the part of the rolling bellows connected to the tubular body.Type: GrantFiled: January 30, 1995Date of Patent: November 19, 1996Assignee: Fichtel & Sachs AGInventors: Holger Gubitz, Heinz-Joachim Gilsdorf
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Patent number: 5575502Abstract: A rotary actuator for a divided stabilizer on a vehicle axle is taught. The rotary actuator has a cylinder, the ends of which are closed to form a working space. Ribs run axially on the inside diameter of the cylinder. In addition, vanes from a motor shaft have the same axial extension within the cylinder as the ribs of the cylinder. The vanes of the motor shaft and the ribs of the cylinder divide the working space into individual work chambers. The rotary actuator can also have a first and a second hydraulic connection for two separate work chambers, with an additional hydraulic connection system between at least pairs of work chambers. The orientation of the connected work chambers is such that the work chambers corresponding to the first hydraulic connection alternate with those which are connected to the second hydraulic connection.Type: GrantFiled: October 28, 1994Date of Patent: November 19, 1996Assignee: Fichtel & Sachs AGInventors: Horst Oppitz, Stefan Schiffler, Bernhard Schmitt
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Patent number: 5575183Abstract: A dual-mass flywheel comprises a primary mass (7) which is adapted to be fastened to a crankshaft (3) of an internal-combustion engine concentric to an axis of rotation (1) and a secondary mass (9) which is mounted for rotation relative to the primary mass (7) around the axis of rotation (1). The secondary mass (9) is coupled in a rotationally elastic manner to the primary mass (7) by a torsion-damping arrangement (19). The primary mass has two formed sheet-metal parts (35, 37) which define a cavity (47) to accommodate springs (17) of the torsion-damping arrangement (19) and is provided with supplementary masses in order to increase the moment of inertia. The supplementary masses may be made up of extensions (45, 63) of the formed sheet-metal parts (35, 37) or of additionally welded-on mass-rings (67). In particular, the supplementary masses are located in a region which is generally radially outwardly of the secondary mass (9).Type: GrantFiled: May 24, 1995Date of Patent: November 19, 1996Assignee: Fichtel & Sachs AGInventors: Bernhard Schierling, Hilmar Gobel, Georg Kraus, Bernd Stockmann
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Patent number: 5573265Abstract: A stabilizer system with a rotary actuator has a first stabilizer part which is non-rotationally connected to a rotary actuator vane assembly. A second stabilizer part is non-rotationally connected to a rotary actuator housing. The rotary actuator housing has hydraulic connections for hydraulic lines which form a flow connection to a hydraulic system, whereby the two stabilizer parts can be rotated with respect to one another by way of the rotary actuator. The segments of the hydraulic lines which are connected to the rotary actuator and are subject to possible deformation are located in a plane which lies essentially perpendicular to the axis of rotation of the rotary actuator. A line fastener can be optionally fastened to the rotary actuator housing or to the stabilizer part which is stationary relative to the rotary actuator housing.Type: GrantFiled: October 28, 1994Date of Patent: November 12, 1996Assignee: Fichtel & Sachs AGInventors: Robert Pradel, Stefan Schiffler
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Patent number: 5569088Abstract: A two-mass flywheel has a first flywheel which can be connected to the crankshaft of an internal combustion engine, and can be provided with a thrust bearing for a hub of a second flywheel. The first flywheel can also be designed in its circumferential area with a radial bearing for the hub. The second flywheel can preferably rotate in synchronization with the first flywheel and can also preferably execute a limited rotation relative to the first flywheel. On this flywheel device, the thrust bearing is oriented so that on one hand, a sufficient supply of lubricant to the thrust bearing is always provided, and on the other hand, so that there is an optimal axial guidance of the hub. The invention teaches that this object can be achieved by a thrust bearing with displacement limit stops for the hub provided on both sides of the hub and extending to the radial bearing.Type: GrantFiled: October 13, 1994Date of Patent: October 29, 1996Assignee: Fichtel & Sachs AGInventors: Bernhard Schierling, Ralf Till, Jorg Sudau
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Patent number: 5566803Abstract: This invention relates to a clutch disc for a friction clutch in which the connection between the hub and the friction linings is made by several leaf-spring-like elements distributed over the circumference, which elements are fastened in their central area to the hub, are essentially tangential to the axis of rotation and run at some radial distance from the axis of rotation in both directions, and are connected by means of their terminal areas to the friction linings.Type: GrantFiled: May 11, 1995Date of Patent: October 22, 1996Assignee: Fichtel & Sachs AGInventors: Joachim Lindner, Jorg Sudau, Bernhard Schierling
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Patent number: 5560463Abstract: A motor vehicle friction clutch with an automatic adjustment for wear of the friction linings, whereby distributed over the circumference of the pressure plate there are several clearance sensors which act on the thrust plate with the interposition of an adjustment device. Each clearance sensor is thereby mounted in a hole in the thrust plate, so that it can move axially against the force of an adapter sleeve.Type: GrantFiled: October 28, 1994Date of Patent: October 1, 1996Assignee: Fichtel & Sachs AGInventors: Achim Link, Reinhold Weidinger, Heiko Schulz-Andres, Klaus Elsner, Rainer Wiedmann, Ralf Nenninger, Michael Weib
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Patent number: 5558188Abstract: A motor vehicle suspension system for damping vibrations between, for example, the wheels of the motor vehicle and the body of the motor vehicle, can have a vibration damper unit with two fluid chambers therein and separated from one another by a piston unit. In addition, there can be a fluid bypass connecting the two chambers. A shut-off valve device can be disposed between two portions of the fluid connection to separate a high-pressure section and a low-pressure section, and the latter shut-off valve has a shutoff body which can be adjusted by an external control by means of a magnet armature and a magnet coil between a closed and an open position.Type: GrantFiled: July 10, 1995Date of Patent: September 24, 1996Assignee: Fichtel & Sachs AGInventors: Otto Samonil, Steffen Kraus
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Patent number: 5558189Abstract: A hydraulic, adjustable vibration damper with a piston fastened to a piston rod, which piston divides a working cylinder into two working chambers filled with damping fluid, whereby at least partly to control the damping force there is a pilot-controlled, electromagnetically actuated damping valve. In this valve, a valve body and a pilot control element each apply pressure to a valve seat, and at least the valve body is mounted in a guide so that it can be displaced axially. The valve body consists of at least two parts, whereby one part is held in the axial guide and is connected to the second part so that the second part is located running in an additional axial guide, so that it can be displaced radially with respect to the first part. Whereby the valve seat of the valve body may be disposed adjacent either the first part of the valve body or the second part of the valve body.Type: GrantFiled: July 26, 1995Date of Patent: September 24, 1996Assignee: Fichtel & Sachs AGInventor: Hubert Beck
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Patent number: 5556354Abstract: A shifting arrangement for change gear drives in multispeed hubs for bicycles has a plurality of control planes coaxially disposed relative to one another, within which, by cam control, trip cam rods, which are installed on the surface of the hub axle coaxially thereto, are swivellable around its axis, and which have a first and a second profile, whereby the possibility emerges of engaging and disengaging arbitrarily many couplings disposed one after the other on the hub axle. The shifting arrangement further offers by its design the advantage of controlling pawl couplings, which are disposed on a larger diameter in the change gear drive of the hub, simultaneously and in coordination with the cam control of the sun gears.Type: GrantFiled: April 28, 1995Date of Patent: September 17, 1996Assignee: Fichtel & Sachs AGInventor: Gerhard Meier-Burkamp
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Patent number: 5553693Abstract: Hydrokinetic torque converter with a lock-up clutch, which is equipped with one or more friction plates to increase the transmission capacity or to reduce the internal pressure, whereby at least a portion of the wall of the turbine wheel and the components holding the corresponding friction plate are designed as one piece.Type: GrantFiled: June 22, 1994Date of Patent: September 10, 1996Assignee: Fichtel & Sachs AGInventors: Bernd Schoder, Johannes Sossnitza, Jurgen Demgensky, Josef Riedmann, Horst Jadicke, Wilfried Glock, Friedrich Schramm
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Patent number: 5553713Abstract: A vibration damper assembly having a spring support. The spring support comprises a first support with a spring plate and a second support with a spring plate, whereby at least one spring plate is axially adjustable, so that the spring tension of a spring between the spring plates can be changed, the spring support also a comprising locking device which is active between the adjustable spring plate and the corresponding support, characterized by the fact that the locking device is loosened for the axial adjustment of the spring plate so that during the axial adjustment, the spring plate can be moved independently of the locking means from any desired position into another position without twisting, and the locking device is held in this position.Type: GrantFiled: November 23, 1994Date of Patent: September 10, 1996Assignee: Fichtel & Sachs AGInventors: Heinz Sydekum, Manfred Angles, Frank Hassmann
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Patent number: 5553695Abstract: A friction clutch for a transmission of a motor vehicle generally will have a clutch disc, and the clutch disc will be provided with friction linings for engaging the friction clutch with a rotating engine flywheel. The friction rings can be provided, on both surfaces thereof with trough-shaped depressions, to reduce the weight of the clutch disc. The trough-shaped depressions can essentially be rectangular or square, with rounded corners and with connecting surfaces which are steeply diagonal, or curved with a large radius of curvature.Type: GrantFiled: October 13, 1994Date of Patent: September 10, 1996Assignee: Fichtel & Sachs AGInventors: Dieter Lutz, Franz-Josef Horth, Hartmut Heide, Hilmar Gobel, Alan E. L. Littell, Josef Vonderau, Armin Heid, Erich Scheer
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Patent number: 5551928Abstract: A torsional vibration damper is designed with a driving-side transmission element, with at least one planet carrier which can rotate relative to the transmission element and which planet carrier is provided with at least one plane wheel which is engaged on one hand with a sun gear and on the other hand with a ring gear, and with a driven-side transmission element. One of the transmission elements has control means for a spring device. There are centrifugal masses corresponding respectively to the driving-side transmission element and to the driven-side transmission element, at least one of which centrifugal masses is connected by means of the spring device to at least one element of the planetary gearset which acts as an intermediate mass, whereby the intermediate mass can be driven in a movement which is a function of the speed and direction of rotation of the two centrifugal masses with respect to one another.Type: GrantFiled: December 19, 1994Date of Patent: September 3, 1996Assignee: Fichtel & Sachs AGInventor: Jorg Sudau
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Patent number: 5551540Abstract: A vibration damper is disclosed having a valve actuation device and a housing, in which housing the valve actuation device can be located. The valve actuation device has a controllable coil form, a coil core, and a movable armature for executing an actuation motion. At least a portion of the housing of the vibration damper can represent a magnetic return body for the magnetic flux generated by the coil form.Type: GrantFiled: January 12, 1995Date of Patent: September 3, 1996Assignee: Fichtel & Sachs AGInventors: Andreas F orster, Alfred Wirth