Patents Assigned to SKF
  • Bearing assembly
    Patent number: 4372628
    Abstract: In a bearing assembly particularly for wheel bearings comprising an inner ring having at least one radially outwardly directed fastening flange, an outer ring and a plurality of rolling elements in the annular space between the rings, a cap secured to the inner ring having a radial section extending between the outer ring and fastening flange and a seal ring fastened to the outer ring which slides on the cap, means defining at least one space between the radial cap section and the fastening flange of said inner ring, said space being filled at least partly with means which inhibits heat transfer from the inner ring to the cap.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: February 8, 1983
    Assignee: SKF Kugellagerfabriken GmbH
    Inventors: Heinz Kiener, Gunter Neder, Ranier Schurger
  • Rotary drill bit with conical rotary cutters
    Patent number: 4367904
    Abstract: In a rotary drill bit assembly, comprising a drill bit body, at least one trunnion and a rotary cutter rotatably supported on the rotary cutter by bearing means including at least one inner roller bearing, the rollers of the inner roller bearings running in a deep radial bearing race groove in the trunnion and a deep radial bearing race groove formed in the bore of the rotary cutter and a filling opening extending generally axially in the trunnion between the inner bearing race grooves, characterized in that the outer bearing facing the drill bit body comprises a tapered roller bearing including a plurality of tapered rollers and wherein the filling opening for the rolling elements of the inner bearing is arranged radially inside the inner bearing race of the tapered rollers in the trunnion.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: January 11, 1983
    Assignee: SKF Kugallagerfabriken GmbH
    Inventors: Armin Olschewski, Manfred Brandenstein, Lothar Walter
  • Gear
    Patent number: 4366726
    Abstract: A gear comprises two co-operating gear wheels (1,2), one (2) of which, in operation, performing a conical pendulating movement (nutation). One gear wheel (2) is non-rotationally connected to an adjacent element (8) by resilient elongated members (9), preferably extending mainly in the circumferential direction of the gear wheel between two supports (10,11) arranged diametrically on the gear wheel and two supports (12,13) arranged diametrically on the adjacent element and offset about 90.degree. in relation to the first mentioned supports. The resilient members keep the gear wheel (2) non-rotationally in the adjacent element and permits said pendulating movement of the gear wheel.
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: January 4, 1983
    Assignee: SKF Nova AB
    Inventor: Sven W. Nilsson
  • Drill bit
    Patent number: 4365679
    Abstract: A drill bit with cutting teeth for drilling in rock comprising:a core member having raceways for rolling elements for rotation of the drill bit,a supporting layer exteriorly shaped to define cutting teeth and formed of highly compacted sintered powder material of substantially 90% density, isostatically bonded to said core member,a wear resistant layer applied by thermal spraying and covering only the portions of the cutting teeth which upon drilling directly contact the rock,said wear resistant layer and said supporting layer being isostatically compacted hot which combined are of substantially 99% density,said layers having a solid bond therebetween providing a drill bit of superior mechanical properties including high resistance to wear and chipping.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: December 28, 1982
    Assignee: SKF Engineering and Research Centre, B.V.
    Inventors: Hans B. van Nederveen, Martin B. Verburgh
  • Snap cage of plastic material for ball bearings
    Patent number: 4365852
    Abstract: A plastic snap cage for ball bearings formed of an annular ring having a plurality of pockets each for receiving a ball therein uniformly spaced about the periphery thereof. Each of the pockets have an opening formed at one front edge of the ring limited by planar surfaces extending parallel and symmetrically to a radial line across the entire width of the wall cage thus defining the inside width of the pocket opening. Each of the pockets are also provided in the radial direction with a cylindrical first section conforming to the diameter of the ball and open towards the outer circumference of the cage, an adjacent conically tapering section forming bearing surface for the ball and adjacent to the latter a cylindrical, axially short third section. The entire pocket opening extends in depth in a radial plane open only to the first cylindrical section, up to its inside width.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: December 28, 1982
    Assignee: SKF Kuggellagerfabriken GmbH
    Inventor: Rudolf Fingerle
  • Clutch thrust bearing unit with guided elastic self-alignment
    Patent number: 4365850
    Abstract: Clutch thrust bearing unit with guided elastic self-alignment.Elastic means 17 are inserted between a cylindrical part 18 of the guide sleeve and the inner ring (1) of the rolling bearing. The inner ring 1 has a radial arm 5 in rubbing contact with a radial annular guide section 20 fixed to the part 18. The annular portion 20 comprises a flange 24 fitted with rounded ends 25 which act as locking means on rotation of the inner ring 1 during which at least one extension 23 butts against one end 25 of the flange 24.Any relative rotation between the inner ring 1 and the guide sleeve 20 is thus prevented, which limits the relative wear of these parts in rubbing contact.
    Type: Grant
    Filed: January 28, 1981
    Date of Patent: December 28, 1982
    Assignee: SKF Compagnie d'Applications Mecaniques
    Inventors: Daniel Perrichot, Maurice Faurie
  • Screw and nut mechanism
    Patent number: 4364282
    Abstract: The invention relates to a mechanism with a screw (1) and a nut made of two sheet metal halves (4, 5) and having two complementary helical grooves (12, 13, 14, 15) which constitute raceways for a number of rolling bodies (16, 17) circulating in at least one closed loop around the screw. In order to provide a mechanism with small dimensions and good circulation conditions for the rolling bodies, the groove in a cylindrical portion of the nut surrounding the screw is provided with a recessed portion (18, 19) with a pitch that is different from the rest of the groove, said recessed portion constituting a return portion of the closed loop over a ridge (3) between two adjacent groove turns in the screw.
    Type: Grant
    Filed: August 26, 1980
    Date of Patent: December 21, 1982
    Assignee: SKF Nova AB
    Inventor: Sven W. Nilsson
  • Device for proving a friction joint
    Patent number: 4362411
    Abstract: The invention relates to a device for providing a friction joint by pressing a number of first elements against a second element by means of a pressure medium acting on said first elements. In order to obtain an improved ability of transmitting a torque and an improved stability regarding radial load, said first elements are so arranged that they encircle or are encircled by said second element and are acted upon by a number of mutually independent portions of the pressure medium, each portion acting on its own element.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: December 7, 1982
    Assignee: SKF Nova AB
    Inventor: Sture L. Asberg
  • Method and apparatus for casting or injection-molding of cages of cylindrical rolling elements
    Patent number: 4362687
    Abstract: In a method and apparatus for casting or molding cages for rolling elements, two slides are provided for each pocket. The slides have an engaging, inclined surface, and are shaped to permit one of the slides to be removed by initially sliding it along the inclined surface. The other slide may thereby be moved laterally in the formed pocket, and withdrawn from the pocket. Facing slides of adjacent pockets may be joined together, with limited movement possible therein, to form a complete ring serving as a mold member.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: December 7, 1982
    Assignee: SKF Kugellagerfabriken GmbH
    Inventors: Armin Olschewski, Manfred Brandenstein, Lothar Walter, Heinrich Kunkel, Herbert Dobhan, Peter Horling, Norbert Klupfel
  • Method and apparatus for manufacturing sponge iron
    Patent number: 4362555
    Abstract: Disclosed are a method and apparatus for manufacturing sponge iron by the continuous reduction of iron oxides in a shaft utilizing recirculation gases. Reaction gas is removed from the shaft furnace, substantially cleaned of all CO.sub.2 and H.sub.2 O, and then divided into at least two flow portions one of which is passed to a gas generator comprising a gas generating shaft substantially filled with a solid reducing agent and a plasma burner arranged in the lower portion of said shaft. An oxidant is injected into the hot gas from the plasma burner so as to form a gas mixture comprised primarily of CO and H.sub.2, which gas mixture is then mixed with the other flow portion of the cleaned reaction gas in such proportion that the temperature of the resulting reduction gas is suitable for the reduction of iron oxides in the shaft furnace.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: December 7, 1982
    Assignee: SKF Steel Engineering Aktiebolag
    Inventors: Sven Santen, Borje Johansson
  • Method and apparatus for manufacturing sponge iron
    Patent number: 4362554
    Abstract: Disclosed are a method and apparatus for manufacturing sponge iron by the continuous reduction of iron oxides in a shaft utilizing recirculation gases. Reaction gas is removed from the shaft furnace, substantially cleaned of all CO.sub.2 and H.sub.2 O, and then divided into at least two flow portions one of which is passed to a gas generator comprising a plasma burner. A reducing agent such as pit coal is injected together with an oxidant into the hot gas from the plasma burner so as to form a gas mixture comprised primarily of CO and H.sub.2, which gas mixture is then mixed with the other flow portion of the cleaned reaction gas in such proportion that the temperature of the resulting reduction gas is suitable for the reduction of iron oxides in the shaft furnace.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: December 7, 1982
    Assignee: SKF Steel Engineering Aktiebolag
    Inventor: Sven Santen
  • Universal joint
    Patent number: 4358283
    Abstract: A universal joint is provided with an outer ring and has a socket, an inner ring accommodated in the socket, and a set of flatted balls accommodated in groove-like ball races. The ball races are formed in the surface of the socket and in the surface of the inner ring, respectively, to transmit rotation from one ring to the other ring, wherein a ball with its flat face can freely cooperate with a curved surface of a race.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: November 9, 1982
    Assignee: SKF Industrial Trading & Development Co. B.V.
    Inventor: Zvonimir Z. Kumpar
  • Stator assembly for an electric motor
    Patent number: 4358692
    Abstract: An electric motor comprising a stator and a rotor rotatably mounted in a stator cavity. The stator is made from at least two stator sections and each section comprises a plurality of axially directed generally semi-cylindrical sheet metal laminations having axial edges which are directed inwardly to form the rotor cavity and having the area between said edges surrounded by a stator coil. Each stator part has at its axial ends a radially directed plate member including a series of axially extending spaced teeth which project and engage between the edges of the sheet metal laminations adjacent the plate member to maintain the laminations in predetermined spaced relation to allow passage of cooling medium through the stator coil.
    Type: Grant
    Filed: December 8, 1980
    Date of Patent: November 9, 1982
    Assignee: Aktiebolaget SKF
    Inventor: Stig L. Hallerback
  • Universal joint
    Patent number: 4357810
    Abstract: A homokinetic coupling with an inner ring contained within a groove-like ball race within the outer ring, and with a series of flattened balls therebetween for imparting rotation and transmitting forces, the balls being at least partially enclosed by a flexible annular ball cage.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: November 9, 1982
    Assignee: SKF Industrial Trading & Development Co. B.V.
    Inventor: Zvonimir Z. Kumpar
  • Antifriction bearing for longitudinal movements of a shaft
    Patent number: 4357056
    Abstract: The arrangement according to the invention provides a sealing ring fastened to the end ring in a manner secure against removal by pulling or twisting. This sealing ring is provided with thickened extended arms and is fastened by snapping in the thickened arm sections behind an internal radial shoulder through openings in the flange of the end ring. The opening in the flange of the end ring may be economically manufactured, as by means of axial forms or cores, and without the need for additional radial cores, within the casting mold.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: November 2, 1982
    Assignee: SKF Kugellagerfabriken GmbH
    Inventors: Armin Olschewski, Manfred Brandenstein, Lothar Walter, Horst M. Ernst, Herbert Dobhan, Peter Horling
  • Self centering clutch thrust bearing
    Patent number: 4352419
    Abstract: A self centering clutch thrust bearing has a damping ring between one bearing ring and the sliding sleeve of a housing. The damping ring has resilient projections positioned to engage recesses in the housing with play, to damp small turning motions, and larger projections positioned to engage other recesses in the housing with play, to damp larger turning forces. The resilient projections are mounted to be operative in damping the forces prior to the larger projections.This invention relates to self centering clutch thrust bearings, and more in particular to the provision of damping means in such bearings.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: October 5, 1982
    Assignee: SKF Kugellagerfabriken GmbH
    Inventors: Armin Olschewski, Manfred Brandenstein, Lothar Walter
  • Rolling bearing having separate flange ring with sawtooth-shaped flange
    Patent number: 4350398
    Abstract: In a rolling bearing having a separate flange ring on one side of a bearing ring, the flange ring has an annular flange with a sawtooth-shaped cross section that engages a similar shaped annular groove in the bearing ring.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: September 21, 1982
    Assignee: SKF Kugellagerfabriken GmbH
    Inventors: Horst-Hermann Schulz, Johannes Koneke
  • Process for decomposing hard metal scrap
    Patent number: 4349423
    Abstract: The process is principally based upon an electrochemical technique due to which the binding material for tungsten and cobalt is dissolved and from the solution under certain conditions cobalt or its composition is regained. From the undissolved material after electrolysis tungsten is disposed. By this improved method a very fast decomposition of the hard metal is obtained. Tungsten carbide scrap--a waste material from hard metal tools--can be a decomposed preferably by electrolysis as shown in FIGURE attached.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: September 14, 1982
    Assignee: SKF Industrial Trading & Development Co. B.V.
    Inventors: Hans G. Nutzel, Rudolf Kuhl
  • Freewheel with lateral return
    Patent number: 4347920
    Abstract: Cam-type freewheel, characterized by the fact that the cage is made in one piece in moulded material with roughly rectangular recesses taking the cams, and by the fact that the continuous strip spring is placed round the periphery of the cage and comprises, at right angles to each recess, one or more elastic tabs entering the recess and bearing against the base of the cam in the proximity of the inner bush and so exerting on it a roughly tangential and preferably slightly outwardly oblique lateral thrust, with the angular and axial immobility of the spring with respect to the cage being provided by studs or lugs carried by one of these components and entering openings made in the other.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: September 7, 1982
    Assignee: SKF Compagnie d'Applications Mecaniques
    Inventor: Alain Bordes
  • Freewheel or unidirectional clutch
    Patent number: 4347921
    Abstract: A freewheel of the cam type has a series of jamming cams 1 held by a cage 4 between a shaft 3 and an outer sleeve 2. The cams 1 are held in recesses 5 in the cage, which is a single integral moulding, by an integral spring strip 9 which extends around the outer periphery of the cage 4 and has elastic tabs 10 which project into the recesses 5 and bear against circumferentially extending surfaces 11 on the cams 1. They thus exert a substantially radial force 12 and a reaction on the contact line 13 to produce a torque 8 on the cams. The spring strip 9 is fixed angularly and axially with respect to the cage 4 by lugs 15 on the cage 4 fitting in openings 16 in the strip.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: September 7, 1982
    Assignee: SKF Compagnie d'Applications Mecaniques
    Inventor: Alain Bordes