Patents Assigned to INA
  • Patent number: 5823151
    Abstract: In a switchable cam follower (1) comprising an inner element (2) and an outer element (3), with said inner element (2) comprising a hydraulic clearance compensation device (10), a coupling of the two elements (2, 3) is effected by radially extending coupling means (4). These coupling means (4) and the clearance compensation device (10) which is integrated in the inner element (2) are loaded by hydraulic pressure from a cylinder head of an internal combustion engine through separate channels (9, 8). According to the invention, the spring means (5) for the coupling means (4) are configured so that from a hydraulic medium pressure from about 0.6 bars on (idling engine speed), the elements (2, 3) are uncoupled. When a switching engine speed, for example, 3,000 rpm, has been reached, the hydraulic pressure in the channel (9) is reduced to about 0.1 bars by a control valve (11). The coupling means (4) are displaced by the spring means (5) into a coupling position.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: October 20, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Harald Elendt, Michael Haas, Gerhard Maas
  • Patent number: 5820503
    Abstract: A tensioner for a traction means, particularly a belt (7), comprises a protective plate (1) which is displaceable relative to a stationary machine element, the tensioner further comprises a tension roller (2) mounted rotatably on a bearing pin (3) for contacting the belt (7) and to obtain a perfect tensioning of the belt, the bearing pin (3) comprises an eccentric (5) which is received on the protective plate (1), the longitudinal axes of the eccentric (5) and the bearing pin (3) being spaced from one another by an eccentricity e, and a pivoting of the bearing pin (3) about the eccentric (5) being limited by a stop (8, 9).
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: October 13, 1998
    Assignee: Ina Walzlager Schaeffler oHG
    Inventors: Klaus Bruchner, Ralf Kaufmann, Manfred Bonkowski, Michael Huss
  • Patent number: 5819898
    Abstract: A locking roller overrunning clutch comprising an outer bush (2) having a radial flange (10) at one front end, locking ramps (9) for locking rollers (7) being circumferentially spaced along an inner periphery of the outer bush (2), the overrunning clutch further comprising a cage (3) arranged within the outer bush (2) and having pockets (6) for lodging the locking rollers (7), the pockets (6) being defined by end rings (4) of the cage (3) and by circumferentially spaced crossbars (5) which connect the end rings (4) to each other, at least one of the end rings (4) comprising centering lugs (12) for interlocking with the locking ramps (9), characterized in that the locking ramps (9) extend in axial direction up to an open front end of the outer bush (2) situated away from the radial flange (10), and at least the end ring (4) arranged at the open front end of the outer bush (2) comprises a sealing lip (13) arranged on the end ring (4) on a peripheral surface thereof facing the outer bush (2) and seals a gap form
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: October 13, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventor: Johann Stark
  • Patent number: 5803813
    Abstract: A tripod type constant velocity universal joint comprising an outer joint member having longitudinal recesses arranged in spaced relationship on a periphery thereof, and trunnions symmetrically arranged on a tripod spider, said trunnions located in said recesses of the outer joint member by tripod rollers mounted on rolling elements, characterized in that an inner ring formed without chip removal from sheet metal is arranged between each trunnion and respective rolling elements, the inner ring, the tripod roller and the rolling elements form a roller assembly, and the inner ring comprises at least first and second radially stepped end flanges which form radially inner stops for the rolling elements and radially outer stops for the tripod roller.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: September 8, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Didier Hosdez, Pierre Alber
  • Patent number: 5803032
    Abstract: A device for the continuous variation of a relative angular position between a crankshaft and a camshaft of an internal combustion engine comprising a drive element (2) driven by the crankshaft of the internal combustion engine through a traction means, a sliding sleeve (7) which is positively locked by a first gearing (8, 9) to the drive element (2) and by a second gearing (10, 11) to a driven element (13), and an adjusting piston (6) which is fixed on the sliding sleeve (7) and guided in a housing (3) to axially delimit two pressure chambers (14, 15) which are sealed from each other by a sealing arrangement whereby a radially inward oriented sealing of the sliding sleeve (7), is achieved by providing a sealing disc (17) of continuous configuration which bears against an inner wall (19) of the sliding sleeve (7).
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: September 8, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventor: Dieter Goppelt
  • Patent number: 5800641
    Abstract: A method of thermal or thermochemical treatment of precision steel components having different wall thicknesses comprising the steps of a) hardening (8), b) low temperature cooling (9) and c) annealing (10), wherein the precision steel components are subjected to a low temperature cooling of only selected parts of the precision steel component to effect a reduction in the occurrence of primary residual austenite in the selected parts thereof.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: September 1, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventor: E.H. Georg Schaeffler
  • Patent number: 5797798
    Abstract: A constant velocity universal joint of a tripod type includes an outer joint part with three circumferentially spaced axial guide tracks for respectively receiving a tripod unit which is connected to a tripod spider and guided on a ball-headed pin for angular mobility. The a tripod unit (1) includes a form-fitting coupling directly between the tripod roller (6) and an inner ring (4), with the inner ring (4) having an annular shoulder (16) which has an end face bearing upon the tripod roller (6).
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: August 25, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Denis Bastien, Pierre Alber
  • Patent number: 5794512
    Abstract: A master cylinder for use in a hydraulically actuated clutch or brake system of a motor vehicle, includes a casing formed with a bore, and a piston unit axially displaceable within the bore. The piston unit includes a piston-shaft sleeve received in the bore and having one end formed with a bottom to define an interior, at least two retainer shells received in the interior of the sleeve free of play, and a piston rod having a spherical head swingably mounted to the retainer shells and provided to respond to a manual actuation of a pedal. The retainer shells are each formed at a pedal-proximate end of the piston-shaft sleeve with a spherical recess to define a ball socket in which the spherical head snaps in and is received in form-fitting manner.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: August 18, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Gerhard Prosch, Christian Sperner, Herbert Folk
  • Patent number: 5795257
    Abstract: A tensioning device for a traction element includes a tensioner arm having a tension roller which is spring-loaded against the traction element. The tensioner arm is rotatably supported relative to a housing by means of a conical sliding bearing exhibiting parallel sliding bearing surfaces which extend concentric to the tensioner arm shaft. A helical torsion spring wound along the tensioner arm shaft and clamped between a support secured on the tensioner arm and a fixed support area exerts an axial force which is introduced into the sliding bearing as a reaction force perpendicular to the sliding bearing surfaces.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: August 18, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Peter Giese, Werner Petri, Mattis Racke
  • Patent number: 5794578
    Abstract: A valve timing control apparatus of an internal combustion engine includes an output element having a central bore and in mesh with an adjusting member which reciprocates between two axially spaced end positions, thereby defining two pressure compartments which are fluidly sealed from one another. An oil guide bush is received in the central bore of the output element and projects in a bore of the camshaft or the component securely fixed thereto. A first fluid passageway is formed between an outer surface area of the guide bush and an inner surface area of the driven element for conducting hydraulic medium to one of the pressure compartments, and a second passageway is formed interiorly of the guide bush for conducting hydraulic medium to the other one of the pressure compartments. The guide bush is securely fixed to a screw fastener and so configured as to allow a connection from the interior of the guide bush to the other one of the pressure compartments.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: August 18, 1998
    Assignee: Ina Walzlager Schaeffler oHG
    Inventors: Andreas Strauss, Jochen Auchter, Johannes Meyer
  • Patent number: 5788442
    Abstract: In a sealing arrangement for bores (2) in guide rails (1), particularly for linear assemblies, each bore (2) comprises a radially widened end portion (5) for receiving a screw head (4) of a fixing screw (3) and is adapted to be sealed in a plane parallel to an upper surface (10) of the guide rail (1) by a sealing plug (6) having a disc-shaped upper part (8) and a concentric shank (9), said sealing plug (6) extending in a sealing position in the end portion (5) of the bore (2), characterized in that an annular clamping washer (7) comprising a through-slit (11) in radial direction at one circumferential point is arranged in the end portion (5) between the upper part (8) of the sealing plug (6) and the screw head (4), and the shank (9) of the sealing plug (6) is pressed into a bore (12) of the clamping washer (7) whereby, with the help of the clamping washer (7), the sealing plug (6) is fixed in a simple manner in the end portion (5) of the bore (2) which is thus sealed.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: August 4, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventor: Jean Marie Eder
  • Patent number: 5787850
    Abstract: The clearance compensation element (1) of the invention which can be installed, for example, in a valve drive of an internal combustion engine has a certain idle stroke function for undesired overpressure states of its high pressure chamber (12) during a base circle phase of the actuating cam. According to the invention, a valve means (14) such as a ball which closes the high pressure chamber (12) in the direction of a reservoir (10) is freely movable within certain limits. The ball (14), while being extremely light, closes the valve seat bore (13) with the shortest possible stroke immediately upon commencement of the opening ramp (A.sub.N) of the cam.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: August 4, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Walter Speil, Dieter Schmidt
  • Patent number: 5782216
    Abstract: A tappet (1) is to be engageable on to at least three different cam profiles with an optional zero lift. To this end the tappet (1) consists of an annular base section (2) enclosing a circular base section (3). Both base sections (2, 3) can be coupled together via radially adjustable coupling devices (10). An additional, axially movable inner piston (18) is fitted in a guide sleeve (7) of the circular base section (3). The inner piston (18) can be decoupled via further coupling means (23) so that the tappet (1) can be completely decoupled from the guide sleeve (7).
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: July 21, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventors: Michael Haas, Gerhard Maas, Walter Speil, Birger Wollboldt
  • Patent number: 5778839
    Abstract: A valve actuating mechanism which can be set to three different strokes for a gas exchange valve includes a finger lever actuated by a control cam with a single lift curve, with the finger lever being selectively connectable to a longitudinal guide in the region of its bearing member via incorporation of a piston that is movable in various positions. In a first coupling position of the piston, the bearing member is fixed to the longitudinal guide so that the finger lever executes a maximum pivot during the lift phase of the cam. In a second coupling position of the piston the finger lever is moved axially along the longitudinal guide during a complete cam lift so that the opening cross section of the gas exchange valve is smaller than in the first coupling step. In a third coupling step of the piston, the finger lever executes an idle stroke-pivoting movement on its point of contact on the gas exchange valve which remains closed.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: July 14, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventor: Walter Speil
  • Patent number: 5778842
    Abstract: A valve actuating lever for a valve drive of an internal combustion engine, includes a main body formed therein with a bore and a shaft received in the bore of the main body and defining a pivot axis about which the main body pivots, to thereby control up and down motions of a gas exchange valve in response to travel of a cam mechanism. The shaft has an outer surface area formed with tangential undercuts oriented transversely to the pivot axis and formed through non-cutting shaping process.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: July 14, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventors: Dieter Schmidt, Jurgen Kretschmer
  • Patent number: 5775280
    Abstract: A device for securing an actuating lever, e.g. a finger lever, of a valve control mechanism of an internal combustion engine to a support element, with the actuating lever being formed with a concave recess receiving a spherical end of the support element for allowing the actuating lever to pivot relative to the support element includes a connecting element received in an undercut of a displaceable piston of the support element and having a thickness which is smaller than a width of the undercut to effect a free movement of the connecting element within the undercut in all pivoted positions of the actuating lever.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: July 7, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventors: Dieter Schmidt, Gunter Eisenhardt, Norbert Geheeb, Peter Sailer, Helmut Engelhardt, Wolfgang Mayer
  • Patent number: 5765517
    Abstract: A device for continuously adjusting an angular orientation of a camshaft relative to a crankshaft of an internal combustion engine, includes a housing, an adjusting piston dividing the housing into two pressure compartments and reciprocating in the housing between two end positions in response to operation of a pressure fluid circuit, and a sliding sleeve connected in one piece to the adjusting piston. The sliding sleeve has a first toothed section in mesh with a drive wheel that is in driving relationship with the crankshaft, and a second toothed section in engagement with a toothed bushing that is securely fixed to the camshaft. The toothed sections are formed as helical gears so that an axial displacement of the adjusting piston effects a relative rotation between the drive wheel and the camshaft.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: June 16, 1998
    Assignee: INA Waelzlager Schaeffler oHG
    Inventor: Hermann Wiehl
  • Patent number: 5746165
    Abstract: A cam follower (1) comprises an annular and a circular bottom portion (2, 3). The two bottom portions (2, 3) are concentric to each other, and a low lift cam (4) is arranged opposite the circular bottom portion (3) while at least one high lift cam (5) is arranged opposite the annular bottom portion (2). The cams (4, 5) are arranged out-of-phase with each other in circumferential direction. Since, therefore, when the cam follower (1) is coupled to the high lift cam (5), the low lift cam (4) would disadvantageously actuate the cam follower (1) with its excess lift, a means is provided in the cam follower for compensating this undesired lift.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: May 5, 1998
    Assignee: Ina Walzlager Schaeffler KG
    Inventors: Walter Speil, Gerhard Maas
  • Patent number: 5746673
    Abstract: A tensioning eye for use in a tensioner for a traction drive, in particular a belt drive, in an internal combustion engine, includes a fastening sleeve, a bushing, and an elastic ring circumscribing the bushing for securing the bushing in a bore of the fastening sleeve. The elastic ring has opposite ends formed with radially outwardly directed flanges which are spaced from opposing end faces of the fastening sleeve and define an outer diameter which is greater than a greatest inner diameter of the recess so as to form a radial overlap.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: May 5, 1998
    Assignee: Ina Waelzlager Schaeffler OHG
    Inventors: Rudolf Polster, Werner Schmidt
  • Patent number: 5744175
    Abstract: A device for expanding rotationally symmetrical shaped parts (16), including a divided expanding mold (1), a pressure die (11) and a pressurizing means (14), wherein a mold cavity (9) of the expanding mold (1) is defined in axial directions by continuous end faces (20,21) of two spaced annular molds (17,18) and in radial direction by an inner peripheral surface of two mold halves (2,3).
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: April 28, 1998
    Assignee: INA Walzlager Schaeffler KG
    Inventors: Wolfgang Steinberger, Leo Muntnich, Horst Lingner