Patents Assigned to INA
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Patent number: 4886482Abstract: Tensioning device, particularly a belt tensioning device, for the drive of auxiliary aggregates of an internal combustion engine comprising a swivel arm at one end of which a tension roller for the belt is rotatably mounted and whose other end is plugged by means of a hub onto a journal which is parallel to the axis of rotation of the tension roller and arranged in a fixed pot-shaped housing, a spring whose one end is fixed to the swivel arm and whose other end is fixed to the housing and, arranged in the housing, a friction damping members which produces damping forces of differing magnitude for the swivel arm in the two directions of movement and has a fraction lining lying against the housing wall and acted upon by the swivel arm, characterized in that the friction damping members comprises an inner ring fixed to the swivel arm, an outer ring lying against the friction lining and several rolling elements arranged between these rings and disposed in troughs in the rings for rolling movement along ramps.Type: GrantFiled: May 25, 1989Date of Patent: December 12, 1989Assignee: INA Walzlager Schaeffler KGInventors: Hartmut Koschmieder, Werner Petri
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Patent number: 4878569Abstract: A novel cage for an overrunning roller clutch comprising pockets in the cage for accommodating cam rollers defined by cross bars connected at least at one end by end ring, each pocket being provided with a separate spring element formed by a leaf spring slightly tangentially inclined relative to the adjacent crossbar, the said leaf springs being connected at one end with an annular flange abutting against the outside of one end ring of the cage and passing through the leaf springs by a cutout.Type: GrantFiled: April 4, 1984Date of Patent: November 7, 1989Assignee: INA Walzlager Schaeffler KGInventor: Georg Schaeffler
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Patent number: 4876996Abstract: A device for the valve control gear of an internal combustion engine including a surface of which acts as a stop face for a cam. The surface is chromium coated.Type: GrantFiled: March 7, 1989Date of Patent: October 31, 1989Assignee: INA Walzlager Schaeffler KGInventors: Ernst Mayer, Norbert Geheeb, Uwe Kohler
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Patent number: 4876994Abstract: A hydraulic play compensation element for the drive of a valve of an internal combustion engine with a housing in which a hollow piston is mounted such as to be acted upon, via a non-return valve, by oil pressure, the hollow piston being surrounded by an oil reservoir which communicates via an oil passage with the inner space of the hollow piston and in which a sleeve is inserted which with a part of its wall forms an oil transfer channel between an oil inlet in the housing and an upper region of the reservoir.Type: GrantFiled: April 14, 1989Date of Patent: October 31, 1989Assignee: INA Walzlager Schaeffler KGInventors: Walter Speil, Bolko Schuseil, Dieter Schmidt
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Patent number: 4876997Abstract: A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine against whose one end face a cam abuts and whose other end face lies against a valve stem which avoids the disadvantages of the prior art and achieves a durable self-tightness of the sleeve with respect to the oil reservoir independently of the deflections of the end member by using simple constructional and particularly hardly more expensive means.Type: GrantFiled: February 27, 1989Date of Patent: October 31, 1989Assignee: INA Walzlager Schaeffler KGInventors: Helmut Zorn, Georg Schaeffler
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Patent number: 4867114Abstract: A self-adjusting hydraulic valve tappet disposed in a guide bore of a cylinder head of an internal combustion engine and comprising a cup-shaped housing comprised of a hollow cylindrical wall closed at one end by an end member against the outside of which a cam of a camshaft abuts whereby the actual hydraulic play compensating element is guided for longitudinal movement in a bore of a radial flange located at a distance from the end member, the bore being concentric with the hollow cylindrical wall and the radial flange as separate component consisting of a material having a higher coefficient of expansion than steel and being inserted and fixed in the bore of the hollow cylindrical wall with its external mantle surface in a liquid-proof manner, characterized in that between the end member on one side and the radial flange on the other side a hollow tubular element is disposed which under axial pre-tension bears with one of its axial ends against the end member and with its other axial end against the radialType: GrantFiled: February 27, 1989Date of Patent: September 19, 1989Assignee: INA Walzlager Schaeffler KGInventor: George Schaeffler
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Patent number: 4867292Abstract: Overrunning clutch with locking elements securely retained by a respective spring element in pockets having plane end faces and being part of a one-piece unitary cage which spring element includes a spring section extending axially adjacent to the locking element and having a projection which acts upon the locking element with a spring force in the direction of engagement and a restraining area supported by the unitary cage, characterized in that the spring element (18) is made of flat material and the spring section (20) is defined by at least one bend (27,28) of the flat material, that the bend (27,28) extends in the area between the one radial plane (10 and 11, respectively) in which the frontal outer surface of the unitary cage (1) extends and the one radial plane (12 and 13, respectively) in which the end faces (8 and 9, respectively) of the pockets (4) near this outer surface extend with the greatest axial inside width (L), and that the restraining area (19) is retained in a self-locking manner on the uType: GrantFiled: August 19, 1988Date of Patent: September 19, 1989Assignee: INA Walzlager Schaeffler KGInventor: Gunter Hartig
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Patent number: 4863005Abstract: A pull-type friction clutch with a release bearing for a motor vehicle in which at least two locking elements spaced at the periphery of an axially displaceable thrust ring to allow it to engage axially with a rotating inner ring of the release bearing in a manner that these two elements get more firmly locked when pulled away from one another characterized in that the locking elements (15, 16, 17) have an angular cross-section and are mounted on the thrust ring (9) about an axle (18, 19, 20) so as to be able to swing into a locking position, whereby the edges of the locking elements (15, 16, 17) facing the inner ring (22) are shaped as hooks (21) which engage with a collar (24) formed on the inner ring (22) and the edges of the locking elements (15, 16, 17) away from the inner ring (22) have the shape of angle segments (31) whose surfaces (32) bear against the side of the pressure ring (9) facing away from the hooks (21 ).Type: GrantFiled: February 5, 1988Date of Patent: September 5, 1989Assignee: INA Walzlager Schaeffler KGInventor: Walter Parzefall
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Patent number: 4856468Abstract: A ball-and-socket joint interposed between a rocker arm and a valve shaft of an internal combustion engine including a journal cooperating with the rocker arm and having a crowned end face which cooperates with a spherical cavity of a joint socket provided at its side opposing the spherical cavity with a plane surface by which it bears against the valve shaft wherein a restraining element is linked to the journal or to a structural element connected to the journal for grasping from behind the circumferential surface of the joint socket thereby securely holding the latter at the journal, characterized in that the restraining element is a spring element (10,19) which bears by elastic prestress against the joint socket (7) thereby holding the crowned end face (5) of the journal (4) in play free contact with the spherical cavity (6).Type: GrantFiled: May 24, 1988Date of Patent: August 15, 1989Assignee: INA Walzlager Schaeffler KGInventors: Walter Speil, Dieter Schmidt, Michael Zipprath
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Patent number: 4856474Abstract: A valve control device for a cam-shaft controlled exhaust valve of a cylinder of a motor vehicle internal combustion engine with an exhaust cutoff brake wherein an actuator closes a throttle valve in the exhaust of the cylinder to initiate a braking operation, characterized in that a hydraulic valve clearance compensation element is arranged between the cam-shaft and the exhaust valve whereby an adjusting piston is guided in a cylindrical body and is loaded by a return spring and a control element is provided to retain the adjusting piston relative to cylindrical body during braking in the adjusted position respectively reached at the beginning of the braking operation wherein the control element acts upon the hydraulic valve clearance compensation element during braking operation with a force which exceeds or at least corresponds to the force of the return spring of the hydraulic valve clearance compensation element and counteracts the latter.Type: GrantFiled: February 23, 1988Date of Patent: August 15, 1989Assignee: INA Walzlager Schaeffler KGInventor: Siegfried Tisch
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Patent number: 4854922Abstract: A tensioning device for belts, chains and similar components especially for the camshaft drive of an internal combustion engine comprising a tension roller mounted on a movable support and a control element by which the support can be moved by an actuating mechanism in the relaxing direction of the belt against the action of a pressure spring when the control element gets heated, characterized in that the control element has a cavity for receiving a pressure liquid whose volume varies as a function of the temperature, the cavity being closed by a membrane connected to the actuating mechanism which operates dependably for long periods of time.Type: GrantFiled: February 27, 1989Date of Patent: August 8, 1989Assignee: INA Walzlager Schaeffler KGInventors: Steffen Hertrich, Dieter Goppelt
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Patent number: 4850467Abstract: A clutch release sleeve for motor vehicles comprising a housing having at two opposite points of its circumference radially extending lugs against which two parallel arms of a clutch fork abut to embrace the housing within reach of two flat faces, characterized in that the lugs (2) have a radial extension (a) of at least 10% of the housing diameter (D) and a tangential extension (b) of at least 25% of the housing diameter (D) and are offset laterally in opposite directions in relation to a straight line running through the sleeve axis (9), on one hand, and through the points of contact (10) of the clutch fork (4) and the lugs (2) on the other hand so that they project over the straight line further in one direction than in the other direction wherein the flat faces are perpendicular to the straight line.Type: GrantFiled: January 4, 1989Date of Patent: July 25, 1989Assignee: INA Walzlager Schaeffler KGInventor: Walter Parzefall
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Patent number: 4840160Abstract: A control device for a valve arranged in a fuel injection line of an internal combustion engine and closable to build up of injection pressure at an injection nozzle wherein a play adjusting element is arranged between a valve body of the valve and a drive element, characterized in that the adjusting element (14) is provided with two pistons (15, 22) guided in a housing (13), the first pistion (15) is acted upon by the drive element and the second pistion(22) acts upon the valve body, and the housing (13) accommodates between the pistons (15, 22) an oil-containing pressure chamber (23) which is sealed against the valve (1, 2) and accommodates a pressure spring (24) acting upon the pistions (15, 22).Type: GrantFiled: February 11, 1988Date of Patent: June 20, 1989Assignee: INA Walzlager Schaeffler KGInventors: Michael Zipprath, Dieter Schmidt
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Patent number: 4840600Abstract: A linear needle roller bearing has a linear needle bearing block having two generally rectangular ends defining an outer peripheral bearing surface therebetween. The outer peripheral bearing surface extends perpendicular to the ends of the bearing block and forms a plurality of linear bearing surfaces. A plurality of needle rollers are disposed on the outer peripheral bearing surfaces and a retaining member is fixed to each end of the block. The needle rollers are standard needle rollers having the shape of right cylinders. Each retaining member has a lip which extends over one end of each of the plurality of needle rollers, thereby retaining the needle rollers on the block.Type: GrantFiled: May 8, 1987Date of Patent: June 20, 1989Assignee: INA Bearing Company, Inc.Inventors: Craig E. White, Bobby L. Hodge
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Patent number: 4834694Abstract: Apparatus for applying an optimum tensioning force to an endless belt or the like, including a pivot defining a first pivot axis, a belt engagement element supported for rotation about the first pivot axis, a biasing element for urging the belt engagement element in a first direction of rotation about the pivot axis into belt-tensioning engagement with the belt, and a belt tension adjuster, responsive to externally induced changes in tension of the belt, for automatically varying the tensioning force applied to belt. The belt tension adjuster is disposed within the biasing element and includes a limiter for limiting the amount of decrease in applied tensioning force, whereby the tension in belt is optimally maintained.Type: GrantFiled: July 25, 1988Date of Patent: May 30, 1989Assignee: INA Bearing Co., Inc.Inventor: Kelly D. Martin
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Patent number: 4832166Abstract: A friction clutch for a motor vehicle with a release bearing which is engaged by a clutch lever with an axially displaceable thrust ring connected in an axially locked manner with regard to pulling by locking elements spaced about its periphery with a rotatable inner ring of the release bearing, and with unlocking lugs corresponding with the locking elements and disengage the locking elements from the inner ring, characterized in that an unlocking slide (15) is guided for radial displacement between an idle position and an unlocking position on the clutch lever (3) and corresponds with the unlocking lugs (22) and the unlocking lugs (22) disengage the locking elements (12) from the inner ring (7) by the unlocking slide (15) which is shifted into the unlocking position.Type: GrantFiled: February 5, 1988Date of Patent: May 23, 1989Assignee: INA Walzlager Schaeffler KGInventor: Walter Parzefall
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Patent number: 4825823Abstract: A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine and comprising a cup-shaped housing (1) formed by a hollow cylindrical wall (2) closed at one end by an end member (3) against the outside of which a cam abuts and a guide sleeve (4) concentric with the hollow cylindrical wall (2) and extending at its end facing away from the end member (3) to the center of a disk member (5) connected with its outer circumference to the hollow cylindrical wall (2) of the housing (1) wherein the guide sleeve (4) is spaced from the end member (3) at its other end and guides the hydraulic play compensating element (6) for longitudinal movement thereof, characterized in that a second disk member (7) is provided which extends from the hollow cylindrical wall (2) and additionally supports the guide sleeve (4) at a distance from the first disk member (5).Type: GrantFiled: October 15, 1987Date of Patent: May 2, 1989Assignee: INA Walzlager Schaeffler KGInventor: Georg Schaeffler
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Patent number: 4821386Abstract: A method of producing a rolling bearing race provided with a continuous rupture seam along at least one area of its periphery and having a seating surface and a race for rolling elements, the rolling bearing race surface being exposed before rupture along at least a portion of the intended course of the rupture seam to high-energy radiation with the local confines transerve to the intended course of the rupture seam and during rupture the surface area exposed to radiation is subjected to tensile stress by an external force, characterized in that the seating surface (2,8) of the bearing race (1,7) is exposed to the radiation and the external force is exerted as a pressure force onto the raceway surface (3,9) along an area directly opposed to the area (6,10) of the seating surface (2,8) exposed to radiation.Type: GrantFiled: March 25, 1987Date of Patent: April 18, 1989Assignee: INA Walzlager Schaeffler KGInventors: Michael Simon, Werner Kreiss
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Patent number: 4822322Abstract: Apparatus for maintaining a predetermined optimum tension on an endless power transmission member, including a first cylindrical housing including a radially extending arm member, a pulley member carried by an arm member at the end thereof remote from the first housing, a pivot member for first housing, pivot member defining a pivot axis, and including a second cylindrical housing and one-way clutch member permitting pivoting of second housing in one direction only, second housing being disposed within first housing. Members coupled between the pivot member and first housing are included for rotatably driving said first housing about said pivot member in a first direction to move pulley member into tensioning engagement with endless power transmission member.Type: GrantFiled: July 25, 1988Date of Patent: April 18, 1989Assignee: INA Bearing Co., Inc.Inventor: Kelly D. Martin
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Patent number: 4800851Abstract: A hydraulic play compensating element (1) for a valve control mechanism in internal combustion engines comprising an outer piston (4) closed on one end and insertable for displacement in the longitudinal direction in a bore (2) of a structural element (3) of the valve drive and which guides an inner piston (5) for longitudinal displacement with slight play in a longitudinal bore wherein both pistons encompass a high pressure chamber (6) therebetween which communicates via a check valve (7) arranged in the inner piston with an oil reservoir (8) provided in the inner piston (5), and wherein the inner piston (5) is supported at its end facing away from the pressure chamber by a disc (9) which is fixed in the bore (2) of the structural element (3) of the valve drive, characterized in that the disc (9) engages the bore (16) of the inner piston (5) with radially resilient clamping projections (15) upon contacting the end of the inner piston (5) facing away from the pressure chamber (16).Type: GrantFiled: February 5, 1988Date of Patent: January 31, 1989Assignee: INA Walzlager Schaeffler KGInventors: Steffen Hertrich, Friedrich Ness, Charles Knorr