Patents Assigned to Kugelfischer Georg Schafer & Co.
  • Patent number: 4398775
    Abstract: A journal bearing for two relatively rotatable members is formed from two coaxial rings, one of them being axially divided into two mutually symmetrical halves with respective annular track surfaces each bounded only by an external shoulder while the other ring has two annular track surfaces separated by a pair of internal shoulders. Two sets of rotary bodies (balls or rollers) are confined by these shoulders between respective inner and outer track surfaces and are held spaced apart by a common annular cage with annular lips or groups of teeth snap-fitted into a pair of closely juxtaposed annular grooves near the shoulderless internal edges of the two ring halves whereby the entire assembly is held together when detached from the relatively rotatable members.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: August 16, 1983
    Assignee: Fag Kugelfischer Georg Schafer & Co.
    Inventors: Heinrich Hofmann, Gunter Markfelder, Manfred Troster
  • Patent number: 4387596
    Abstract: Spherical bodies, such as bearing balls, are tested for machining irregularities or structural defects by subjecting them to supersonic vibrations from two or more ultrasound generators through the intermediary of a coupling liquid in which these bodies are immersed. One ultrasound generator has an axis in line with the body being tested while the other generator or generators have axes including acute angles with the radial directions of that body. The body is subjected to rotation in different planes by injecting the coupling liquid, alternately or simultaneously but at varying relative rates, through two different nozzles into an interspace separating the body from a spherically concave supporting surface.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: June 14, 1983
    Assignee: FAG Kugelfischer Georg Schafer & Co.
    Inventors: Max Fenkner, Hilmar Wehner
  • Patent number: 4379600
    Abstract: One of two coaxial races of a ball or roller bearing is provided near an edge thereof with an internal annular groove into which a peripheral lip of a plastically deformable sealing ring of generally L-shaped half-section is forced by camming engagement with an axially more inwardly positioned annular member resting against a transverse shoulder of that race. The annular member may be a lip seal in contact with the other race or may be part, together with the deformable ring, of a labyrinth seal including at least one further ring mounted on that other race.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: April 12, 1983
    Assignee: FAG Kugelfischer Georg Schafer & Co.
    Inventor: Armin Muller
  • Patent number: 4376541
    Abstract: A seal assembly engages between at least one body having an outwardly directed cylindrically annular surface centered on an axis and an annular and planar surface perpendicular to and centered on the axis and another body having an inwardly directed cylindrically annular surface centered on the axis. The seal assembly has a rigid C-section support ring fixed to the inwardly directed surface and open axially toward the planar surface, an elastomeric radial ring seal having an outer periphery vulcanized to the support ring and an inner periphery radially inwardly engaging the outwardly directed surface, and an elastomeric axial ring seal received in the support ring and engaging axially against the planar surface. Such a seal assembly is extremely compact so that it can be provided right in a roller bearing without substantially increasing its size. The radial seal can lie within the radial projection of the axial seal to give the arrangement a very short axial length.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: March 15, 1983
    Assignee: FAG Kugelfischer Georg Schafer & Co.
    Inventors: Wilhelm Walter, Peter Dreschmann
  • Patent number: 4345800
    Abstract: The disclosure concerns a double-row, radially self-aligning, roller bearing. The bearing has an outer race ring and an inner race ring. Two annular arrays of rollers are carried in respective cages located at the two axial sides of the bearing. Each cage defines a respective pocket for each roller of the roller bearing. The circumferential side walls of a pocket are generally profiled to the sides of the respective roller. The cages are also defined by an axially inward and axially outward ring which joins the pocket walls. The diameters and placements of the rings of the cages are selected so that in an axial projection of the rings, one upon the other, the rings do not intersect. The axially more inward ring has an inner diameter that is not less than the outer diameter of the axially more outward cage ring, and the bearing rollers are inclined appropriately. The cages are comprised of elastic, flexible, plastic material enabling the cages thus shaped still to be installed in the race rings.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: August 24, 1982
    Assignee: Fag Kugelfischer Georg Schafer & Co.
    Inventors: Heinrich Hofmann, Gunther Markfelder, Hans-Eberhard Bender
  • Patent number: 4333307
    Abstract: A friction rotor for false-twisting threads is provided with a coating of particles which are harder than the material from which the rotor has been made to provide a surface of harder particles which contact the thread as it passes over the rotor for false-twisting.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: June 8, 1982
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Friedrich Schuster, Hans Hermanns
  • Patent number: 4333308
    Abstract: A false-twist apparatus has a base defining a fixed axis on which is journaled a fixed disk assembly including a shaft and a plurality of disks journaled in the base with the shaft at the fixed axis and the disks spaced therealong. A pair of supports are pivotal on this base and define respective movable axes offset from their pivot axes. Journaled on each of these supports at the respective movable axis is a movable disk assembly including a shaft and a plurality of disks, the shaft lying on the respective movable axis and the disks being spaced therealong. The supports can be pivoted between inner positions with the disks overlapping and each assembly axis equispaced from the other two assembly axes and outer positions with the disk spaced radially. These supports can be secured in the inner positions for false-twisting of a filament passing axially up between the disks.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: June 8, 1982
    Assignee: Fag Kugelfischer Georg Schafer & Co.
    Inventors: Herbert Schleyer, Theo Bieber
  • Patent number: 4312546
    Abstract: A rapidly rotating shaft for a wire-rope-stranding machine or the like, comprising a plurality of tubular sections interconnected by flanged coupling sleeves, has a journal bearing for each coupling sleeve whose inner race is unitary with that sleeve while its outer race is a ring closely surrounded by a cylindrical housing. The ring and the housing are provided with aligned bores for the introduction of lubricant; an annular cage between the two races, having a multiplicity of peripherally spaced pockets engaged by respective bearing rollers, is provided with apertures between these pockets facilitating the passage of the lubricant to the inner race.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: January 26, 1982
    Assignee: FAG Kugelfischer Georg Schafer & Co.
    Inventors: Oswald Bayer, Werner Heinz, Georg Rudloff
  • Patent number: 4296979
    Abstract: A journal bearing for a pump shaft comprises a sleeve whose inner peripheral surface forms two grooved tracks for respective sets of bearing balls adjacent one end thereof and forms a retaining groove near the other end. The two sets of bearing balls, held in respective cages, are also received in a pair of closely spaced peripheral grooves of the shaft confronting the tracks of the sleeve, thereby preventing relative axial shifting of the sleeve and the shaft. A set of bearing rollers are inserted between smooth surface portions of the shaft and the sleeve near the opposite end of the latter and are lodged in pockets of an annular cage having a peripheral rib snap-fitted into the retaining groove.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: October 27, 1981
    Assignee: Fag Kugelfischer Georg Schafer & Co.
    Inventors: Heinrich Hofmann, Gunther Markfelder
  • Patent number: 4286467
    Abstract: Rollers for a high-speed journal bearing are tested for any unbalance before assembly by being rotated at high velocity while lodged in a movably supported air bearing. Rollers with a dynamic unbalance above a predetermined limit are rejected.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: September 1, 1981
    Assignee: FAG Kugelfischer Georg Schafer & Co.
    Inventor: Hans Kober
  • Patent number: 4281548
    Abstract: A method of testing rotary bodies, such as balls, for ball bearings, in which the body on a layer of a coupling liquid is subjected to ultrasonic waves transmitted through the ultrasonic liquid and the reflections are measured and displayed. According to the invention the bodies are freely movable in a seat while being immersed in the liquid and jets of the liquid open tangentially into the region between the body and the seat and are intermittently pulsed so that the body undergoes multiaxial rotation.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: August 4, 1981
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventor: Hans Kober
  • Patent number: 4273229
    Abstract: A mounting for a shaft of a tool rotating at high speed comprises a rotatably journaled tube with an axial bore of a diameter exceeding that of the tool shaft. The latter is held in that bore by resilient inserts, such as soft springs or O-rings, whose elasticity coefficient is so chosen that the shaft has a critical speed well below the operating speed of the tool. A locking device, preferably actuated automatically by a speed sensor, consolidates the shaft with the tube until the system surpasses the critical speed.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: June 16, 1981
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventor: Horst Voll
  • Patent number: 4252386
    Abstract: A ball or roller bearing with two symmetrical halves, each designed to absorb both radial and axial stresses, comprises an axially split inner ring on a shaft and an axially split outer ring carried by a housing member coaxially surrounding the shaft. The inner ring halves form seats for respective rows of balls or rollers engaging contact zones on the inner peripheral surfaces of the outer ring halves that are offset from these seats in either an axially inward or an axially outward direction. In the first instance, the housing member has an annular disk received in an annular recess or groove of the same axial width which is formed by two confronting peripheral rabbets on the outer ring halves; in the second instance the inner ring halves are rabbeted to form an annular recess or groove receiving an axially coextensive peripheral rib on the shaft. In either case, the two rabbeted ring halves are axially separated by a small gap.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: February 24, 1981
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Heinrich Hofmann, Johannes Brandlein, Gunter Markfelder
  • Patent number: 4244630
    Abstract: A pump shaft is journaled in a housing through the intermediary of two metal rings forming the outer races of a ball bearing and a roller bearing whose rotary bodies are in direct contact with the shaft. The two bearing rings, which are relatively axially shiftable during assembly, are interconnected by a sleeve preferably of synthetic resin which they engage with a snap fit. The outer diameter of the sleeve is less than that of either ring; the two outer ring diameters may also differ in size from each other.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: January 13, 1981
    Assignee: Fag Kugelfischer Georg Schafer & Co.
    Inventor: Roland Tischer
  • Patent number: 4226080
    Abstract: A false-twist apparatus has a support defining three generally parallel and radially spaced axes surrounding a central axially extending twisting region. Respective shafts are journaled in this support for rotation about the axes and carry respective staggered sets of axially spaced disks whose rims radially overlap at the twisting region. Yarn eyes above and below the sets of disks are axially aligned with this twisting region so that a yarn to be false-twisted can pass axially through the lower eye, then zigzag along the regions in contact with the disks, and then pass axially out through the other eye. All of the disks are permanently joined and synchronously rotated. A holder displaceable in a straight line on the apparatus support carries a plurality of arms having yarn-pushing tips that can push a yarn to be false-twisted radially into the region.
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: October 7, 1980
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Theo Bieber, Friedrich Schuster, Gunther Paul, Gunther Schmitt, Wolfgang Schmucker
  • Patent number: 4194797
    Abstract: A bearing race ring, especially for high-speed applications, e.g. in jet engines, turbines and high-speed power plants, comprises an annular metallic body formed along one of its inner or outer surfaces with axially extending grooves which are inclined to the axis of the ring. Preferably each groove begins at a level at which an adjacent groove terminates and the angle which the groove makes with the longitudinal axis is defined by the formulatan .alpha.=d.multidot..pi./n.multidot.bwherein .alpha. is the aforementioned angle, d is the diameter of the surface provided with the groove, n is the number of grooves and b is the width of the ring.
    Type: Grant
    Filed: May 24, 1978
    Date of Patent: March 25, 1980
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Karl Hormann, Hans Weigand
  • Patent number: 4175802
    Abstract: A boring spindle unit with automatic tool liftoff, especially for the finish boring of a workpiece with an oxide-ceramic boring tool carried by the spindle shaft. The spindle shaft is journaled in at least two main bearings and at least a further bearing is disposed proximal to the main bearing at the tool end of the shaft. During the spindle retraction movement, the additional bearing takes up the journaling of the shaft and has an axis which is offset by a distance from the axis of the main bearings and in a direction opposite that from which the tool projects from the shaft so that the tool does not groove the workpiece during the retraction operation. While the main bearings are effected, the auxiliary bearing receives the shaft with radial play and, while the auxiliary bearing is effective, at least the main bearing proximal to the tool end receives the shaft with radial play.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: November 27, 1979
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Horst Voll, Franz Kessler, Max Herla
  • Patent number: 4161344
    Abstract: A mounting for a load rotating or oscillating about a vertical axis comprises a stationary annular support member centered on that axis and provided with inner and outer peripheral guide tracks engaged by two rotatable annular carrier members, either the stationary member or the rotatable members being split along a horizontal plane for positive interfitting. A load-carrying platform overlying the three coaxial members is separated from the stationary member and from one of the carrier members while being secured to the other carrier member through the intermediary of an interposed spacer for rotary entrainment thereof. The spacer, in the form of a multiplicity of ring segments, can be transferred to the previously idle rotatable member upon excessive wear of the guide track associated with the carrier member previously entrained.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: July 17, 1979
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Aime Delarbre, Joachim Boesner, Michael Blank
  • Patent number: 4153309
    Abstract: A cage for the rollers of a journal bearing, held between two shoulderless track surfaces at least one of which is formed by a ring, has an annular flange resiliently engaging in a peripheral V-groove of the ring which is axially offset from the roller-holding cage pockets. The flange has an end face formed with an annular incision designed to make it radially compressible, that incision lying at or just beyond one of the radial limits of the gap formed between the two track surfaces. The axially outer boundary of the V-groove is recessed with reference to the associated track surface.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: May 8, 1979
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Gunter Markfelder, Heinrich Hofmann
  • Patent number: 4138170
    Abstract: An annular array of rotary bodies (balls or rollers) separates two coaxial track surfaces of a pair of bearing rings from each other, one of these track surfaces forming an annular lodgment for these bodies while the other track surface is unobstructed on at least one side of the array to facilitate the initial assembly of the bearing rings and the bodies into a unit. At least one retaining element embraces one of the rotary bodies and has a flange resiliently snap-fitted into an annular V-groove of the unobstructed track surface, the flange having an undercut enhancing its radial compressibility to facilitate such engagement; this holds the unit together during transportation and handling.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: February 6, 1979
    Assignee: Kugelfischer Georg Schafer & Co.
    Inventors: Gunter Markfelder, Heinrich Hofmann