Patents Assigned to INA
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Patent number: 5884595Abstract: Upper and lower contact discs (5, 6) are used for adjusting valve clearance with a mechanical cup tappet (1). The lower contact discs (6) have a substantially larger clearance adjusting range H.sub.SW than the upper contact discs (5). In this way, the invention succeeds in further reducing the total mass of the cup tappet (1) because, in an initial mounting of the cup tappet (1), the valve clearance is adjusted through the relatively small lower contact disc (6) and thus with relatively small mass fluctuations.Type: GrantFiled: December 4, 1997Date of Patent: March 23, 1999Assignee: Ina Walzlager Schaeffler oHGInventors: Michael Haas, Walter Speil
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Patent number: 5885009Abstract: A cage (1) for cylindrical rolling elements (5) comprising two side rings (2, 3) connected to each other by circumferentially uniformly spaced crossbars (4) so that receiving pockets (6) are formed for the rolling elements (5) is characterized in that opposing end surfaces (8) of the pockets (6) comprise projections (11) which extend inwards in axial direction and bear against end faces of the rolling elements (5) which prevents an axial offset between the rolling elements (5) and the cage (1) so that after insertion and suspension of the first rolling element (5), the cage (1) can be filled with the rest of the rolling elements (5) without their being damaged.Type: GrantFiled: November 17, 1997Date of Patent: March 23, 1999Assignee: Ina Walzlager Schaeffler KGInventors: Leo Muntnich, Herbert Zettner
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Patent number: 5881691Abstract: A rocker arm (1) or finger lever for a valve drive of an internal combustion engine is provided in which a guide bushing (7) is press-fit in a receptacle hole (2). The guide bushing (7) has a bore (9) in which an outer part (4) of a hydraulic play compensation component (3) is guided in a sliding manner. The guide bushing (7) has a radially inwardly directed projection (10) which holds a shoulder formed by a diameter reduction of the outer part (4) from behind or meshes in a groove of the outer part (4). This arrangement allows the hydraulic play compensation component (3) to be secured from loss using the press-fit guide bushing (7).Type: GrantFiled: February 12, 1998Date of Patent: March 16, 1999Assignee: INA Walzlager Schaeffler OHGInventors: Dieter Schmidt, Thomas Rommer
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Patent number: 5878705Abstract: Apparatus (1) for selective actuation of at least one gas exchange valve includes two members (2, 3) which can be selectively coupled through radially moveable coupling element (7), thereby facilitating the return flow of the hydraulic fluid acting upon the coupling element (7) in the direction of displacement especially at low ambient temperatures of the internal combustion engine and thus highly viscous hydraulic fluid. According to the invention, a relief channel (20) with an orifice plate (18) is installed in the return channel. With an orifice plate (18) of this type, the volume flow rate of the hydraulic fluid is largely independent of the viscosity, so that the coupling element (7) can be reset sufficiently fast even at low ambient temperatures.Type: GrantFiled: January 26, 1998Date of Patent: March 9, 1999Assignee: INA Walzlager Schaeffler OHGInventor: Gerhard Maas
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Patent number: 5879086Abstract: An axial rolling bearing with a cage (2) comprising radially directed elastic projections (7, 8) on its inner and/or outer peripheral surface, which elastic projections (7, 8) bear against the collar (6, 5) of the race discs (4, 3) under all operating conditions of the bearing so that the cage (2) is radially centered, even if the shaft lifts off in axial direction.Type: GrantFiled: September 5, 1997Date of Patent: March 9, 1999Assignee: Ina Walzlager Schaeffler KGInventors: Leo Muntnich, Herbert Zettner
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Patent number: 5875751Abstract: A device (1) for varying the valve timing in an internal combustion engine having a hydraulically displaceable annular piston (9) comprises a locking piston (15) arranged adjacent to a pressure chamber (14) which is situated in front of the annular piston (9) and to facilitate a displacement of the locking piston (15) in its uncoupling direction by hydraulic medium, a vent passage (27) leads out of a pressure chamber (26) situated axially behind the locking piston (15) for evacuating the air collected in this pressure chamber (26) into the open.Type: GrantFiled: May 27, 1998Date of Patent: March 2, 1999Assignee: INA Walzlager Schaeffler oHGInventors: Andreas Strauss, Joachim Dietz
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Patent number: 5875748Abstract: A valve drive of an internal combustion engine, includes a switching mechanism incorporated in a support element for support of a cam follower disposed in driving relationship between a camshaft and the gas exchange valve for switching a gas exchange valve to different valve lift curves in response to an operation of a cam arrangement, whereby the switching mechanism has a hollow cylindrical housing defining an axis and received within an enveloping outer casing, an inner element axially displaceable relative to the housing and so received within the housing as to form at their interface an annular gap, and a coupling mechanism movable in a radial direction in a first radial bore arrangement so as to couple the inner element with the housing in a base circle phase of the cam arrangement by bridging the annular gap to thereby maintain a contact of the cam follower upon the cam arrangement, and movable in a radial direction in a second bore arrangement which is spaced from the first radial bore arrangement in dType: GrantFiled: May 6, 1998Date of Patent: March 2, 1999Assignee: Ina Walzlager Schaeffler OHGInventors: Michael Haas, Walter Speil
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Patent number: 5870985Abstract: A cup-shaped valve tappet (1) for activating a gas exchange valve is provided. The tappet includes a hollow cylinder (2) and a base (3). In the interior of the cup-shaped valve tappet (1), a funnel (6) is situated which has a guide casing (9) for accommodation of a play compensation element (10). The guide casing (9) is overlapped by an internal shell (21) provided with an axial channel (23). In order to prevent an emptying of the annular oil storage space (18) surrounding the guide casing (9) or the inner shell (21), a diverting element (19) is provided which consists of a disk-like section (20) and an outer shell which extends from the disk-like section (20). This outer shell (22) forms a hollow space (25) with the hollow cylinder (2) which is connected to a bore hole (17) and from out of which an overflow opening (26) leads into the annular oil storage space (18).Type: GrantFiled: June 4, 1998Date of Patent: February 16, 1999Assignee: Ina Walzlager Schaeffler OHGInventor: Werner Bretting
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Patent number: 5865150Abstract: A device for varying the valve timing of gas exchange valves of an internal combustion engine comprising a driven unit (3) rotationally fixed to a camshaft (2), and a drive unit (6) which is in driving relationship through a traction element with a crankshaft while being rotatably mounted on the driven unit (3), the device (1) further comprising at least two pressure chambers (11, 12) that can be pressurized by a hydraulic pressure medium, the hydraulic pressure medium being fed into the device (1) through a connecting bracket (13) which is rotationally fixed to the driven unit (3) and coaxially surrounds the end portion of the camshaft (2) while comprising on its outer peripheral surface (16), a plurality of annular flanges (29, 30, 31) having sealing rings (20, 21, 22) arranged in annular grooves (17, 18, 19), which annular flanges (29, 30, 31) are sealingly surrounded by a reception bore (36) in a connecting structure (35), characterized in that the sealing rings (20, 21, 22) either comprise an elastic coaType: GrantFiled: March 31, 1998Date of Patent: February 2, 1999Assignee: Ina Walzlager Schaeffler oHGInventors: Ulrich Kramer, Rainer Venz, Jens Schafer
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Patent number: 5860399Abstract: A hydraulic clearance compensation element free of prior art disadvantages and manifesting substantially higher sink values over a wide range of temperatures.Type: GrantFiled: July 11, 1997Date of Patent: January 19, 1999Assignee: Ina Walzlager Schaeffler KGInventors: Walter Speil, Dieter Schmidt
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Patent number: 5860397Abstract: A device (1) for varying the valve timing of the gas exchange valves of an internal combustion engine, essentially comprising a driven unit (2) rotationally fixed to an intake or exhaust camshaft, a drive unit (4) in driving relationship with a crankshaft through a traction element and formed by a drive pinion (5), a housing (6) and a pinion hub (10) made up of an inner ring (11) and an outer ring (13), the device (1) further comprising an adjusting piston (15) which is axially displaceable on the inner wall (7) of the housing (6) and axially delimits two pressure chambers (8, 9) while being connected to a hollow cylindrical sliding sleeve (18) to reduce pressure medium leakages between the pressure chambers (8, 9) and the noise produced by the adjusting piston (15) and the sliding sleeve (18) during their adjusting movements to a minimum by arranging between the outer surface (16) of the adjusting piston (15) and the inner wall (7) of the housing (6), and/or between the inner ring (11) of the pinion hub (10)Type: GrantFiled: June 9, 1998Date of Patent: January 19, 1999Assignee: Ina Walzlager Schaeffler oHGInventor: Jens Schafer
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Patent number: 5853316Abstract: A method of grinding control edges of a control bush of a rotary slide valve for hydraulic steering of motor vehicles, includes placement of the control bush in a support in form of slide shoes or a V block and additionally securing the control bush in the support by pressure rollers. A precise angular positioning of the control bush is effected by press-fitting a mandrel into the interior of the control bush. After grinding the control bush to a predetermined outside diameter, the reference points commensurate with the angular position of the individual control edges are determined by a measuring system. Based on the determined reference points, an optimum reference point for the angular position of all control edges is computed and utilized for adjusting the mandrel in form of a zero point shift for grinding the control edges.Type: GrantFiled: June 12, 1997Date of Patent: December 29, 1998Assignee: INA Walzlager Schaeffler oHGInventors: Ludwig Kern, Andre Kuckuk, Paul Katona
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Patent number: 5846001Abstract: A chiplessly formed bearing washer for a thrust bearing, comprising an angular thrust washer (1) comprising a radial portion (2) which forms a raceway and merges into at least one axial bend (3), said thrust bearing washer comprising a retention means in the form of projections (4) or recesses, the bent edges of the projections (4) or the edges of the recesses are provided with a stamping (7), whereby detrimental stresses occurring in the bent region are avoided.Type: GrantFiled: December 19, 1997Date of Patent: December 8, 1998Assignee: INA Walzlager Schaeffler oHGInventors: Leo Muntnich, Peter Forisch, Heinz Pfann, Hellmut Adler
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Patent number: 5839835Abstract: A self-aligning ball bearing for steering shafts (7) of automotive vehicles having an elastic convexity (8) deviating from the circular shape and arranged in at least one peripheral section of at least one of the raceways (2, 4), preferably of the outer raceway (2), so that two adjacent bearing balls (5) are radially prestressed between the raceway convexity (8) and the facing raceway.Type: GrantFiled: September 16, 1997Date of Patent: November 24, 1998Assignee: Ina Walzlager Schaeffler KGInventors: Alexander Zernickel, Herbert Erhardt, Rainer Lutz
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Patent number: 5836279Abstract: A device for varying the opening and closing times of gas exchange valves of an internal combustion engine, comprising a driven unit (2) rotationally fixed to an intake or exhaust camshaft, a drive unit (8) which is in driving relationship with a crankshaft through a traction element, and an adjusting piston (19) axially displaceable within a housing (10) and axially delimits two pressure chambers (22, 23) while being connected to a sliding sleeve (24) which is provided with two oppositely oriented helical gear sections (26, 28) which cooperate with complementary helical gearings (5, 16) on the driven unit (2) and the drive unit (8), said pressure chambers (22, 23) being sealed from each other by a piston sealing ring (21) and a sealing disc (31) arranged between the end faces (6, 17) of the driven unit (2) and the drive unit (8), a second sealing disc (36) being arranged next to the first sealing disc (31), the inner peripheral clearance of the second sealing disc (36) to the hub (3) is smaller than the mounType: GrantFiled: March 30, 1998Date of Patent: November 17, 1998Assignee: INA Walzlager Schaeffler oHGInventor: Andreas Strauss
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Patent number: 5836278Abstract: The invention relates in particular to a camshaft setting mechanism according to the vane cell principle, which has a drive gear (1) joined with the crankshaft through a toothed belt or a control chain. The drive gear includes a hollow space (8), and an impeller (11) is installed in the hollow space (8). The impeller is fixedly connected to and rotates with the camshaft (14). The drive gear (1) has at least one working chamber (4) on the interior of its circumferential wall (2), and each vane (12) of the impeller (11) subdivides the working chambers (4) into two pressure areas (9, 10) in each case. To avoid leakage through the slits (13) between impeller (11) and the drive gear (1) at high oil temperatures, the impeller (11) is made of a material which has a higher thermal expansion coefficient than the material of the drive gear (1), and that the pressure areas (9, 10) in the hollow space (7) of the drive gear (1) are sealed off by thermal expansion of the impeller (11) when the motor is in operation.Type: GrantFiled: January 15, 1998Date of Patent: November 17, 1998Assignee: Ina Walzlager Schaeffler OHGInventor: Martin Scheidt
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Patent number: 5832884Abstract: A switchable supporting component (30) is to be designed in such a way that a pull-rod engaging at one end (35) of it can be fully operatively separated from the control cam. The invention effects this in that in the housing (31) there runs at least one further radial drilling (37) aligned in a large cam movement phase in which there is a coupling component (49) movable along the drilling which, when the cam is disconnected from the pull-rod, can move in such a way that it laps over an annular gap (41) formed between the housing (31) and the cylinder head (10) and runs at the same time in the two drillings (37) in the housing (31) and the cylinder head (10). Thus, the idle stroke of the housing (31) necessary when the pull-rod is disconnected is avoided. Disconnection can take place even at medium to fast rotation speeds, since a pressure spring (47) no longer keeps the pull-rod in permanent contact with the cam via the housing (31) in the disconnection phase.Type: GrantFiled: October 1, 1996Date of Patent: November 10, 1998Assignee: Ina Walzlager Schaeffler oHGInventors: Michael Haas, Walter Speil
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Patent number: 5829398Abstract: A valve timing control device (1) for varying opening and closing times of gas exchange valves of an internal combustion engine, characterized in that, in at least one of the pressure chambers (5, 6), there is arranged at least one spring means (13) whose spring force acts on the adjusting piston (4) to counteract an undesired adjusting direction (delayed opening and closing times t.sub.N+) of the adjusting piston (4) caused by a drag and frictional torque M.sub.S of the camshaft (2) during operation of the internal combustion engine, whereby the drag and frictional torque M.sub.S in a low-speed, low-load range of the internal combustion engine is substantially counteracted by an oppositely directed torque M.sub.F obtained from the spring force of the spring means (13).Type: GrantFiled: October 23, 1996Date of Patent: November 3, 1998Assignee: INA Walzlager Schaeffler KGInventors: Andreas Strauss, Eduard Golovatai-Schmidt, Martin Scheidt
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Patent number: 5829400Abstract: In a valve drive (1) for the simultaneous actuation of, for instance, three equally acting gas exchange valves (2), longitudinal axes of the gas exchange valves (2) are arranged so as to include an angle therebetween wherein a bridge (4) is arranged between the cams of a camshaft (3) and the gas exchange valves (2), and the longitudinal axis (9) of the guide means (5) of the bridge (4) extends parallel to a bisectrix (10) between the longitudinal axes of the gas exchange valves (2a, 2b).Type: GrantFiled: November 25, 1997Date of Patent: November 3, 1998Assignee: Ina Walzlager KGInventors: Walter Speil, Michael Haas
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Patent number: 5829399Abstract: Apparatus for adjusting a rotational relation between a camshaft and a timing pulley of an internal combustion engine of a type having a crankshaft for driving the timing pulley and a cylinder head for rotatably supporting the camshaft, includes a housing receiving a double-acting piston for displacement in an axial direction between two axially spaced end positions and defining with the housing two pressure compartments. Secured to the piston is a control bushing which is geared to the timing pulley via a first gearing and operatively connected to the camshaft via a second gearing.Type: GrantFiled: December 11, 1996Date of Patent: November 3, 1998Assignee: Ina Walzlager Schaeffler oHGInventors: Martin Scheidt, Dieter Goppelt, Manfred Wilhelm, Eduard Golovatai-Schmidt