Patents by Inventor Erwin Hartmann

Erwin Hartmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9689431
    Abstract: A seal arrangement (1) of an anti-friction bearing, which seal arrangement (1) is inserted between a first bearing part (2) and a second bearing part (4). The seal arrangement includes a seal (6) which is positioned on the rotationally fixed first bearing part by a support element (15) which is enclosed at least on one side by an elastic seal material (16), and which seal (6) includes at least one sealing lip (25, 26). A thrower ring (7), forming a collection chamber (13), of the seal arrangement is assigned to the second rotatable bearing part. To this end, a cylindrical portion (9) of the thrower ring is snapped in an end-side circumferential groove (11) by a flange (5) of the second rotatable bearing part. A radial leg (12) of the thrower ring extends such that it maintains a sealing gap (14) to the seat. Moreover, the seal of the seal arrangement includes elastic sealing lips which are supported on the second bearing part such that they are offset with respect to the thrower ring.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: June 27, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Wilhelm Walter, Erwin Hartmann, Alexander Happ
  • Publication number: 20160186815
    Abstract: A seal arrangement (1) of an anti-friction bearing, which seal arrangement (1) is inserted between a first bearing part (2) and a second bearing part (4). The seal arrangement includes a seal (6) which is positioned on the rotationally fixed first bearing part by a support element (15) which is enclosed at least on one side by an elastic seal material (16), and which seal (6) includes at least one sealing lip (25, 26). A thrower ring (7), forming a collection chamber (13), of the seal arrangement is assigned to the second rotatable bearing part. To this end, a cylindrical portion (9) of the thrower ring is snapped in an end-side circumferential groove (11) by a flange (5) of the second rotatable bearing part. A radial leg (12) of the thrower ring extends such that it maintains a sealing gap (14) to the seat Moreover, the seal of the seal arrangement includes elastic sealing lips which are supported on the second bearing part such that they are offset with respect to the thrower ring.
    Type: Application
    Filed: June 26, 2014
    Publication date: June 30, 2016
    Applicant: Schaeffler Technologies AG & Co. KG
    Inventors: Wilhelm Walter, Erwin Hartmann, Alexander Happ
  • Patent number: 8628248
    Abstract: A seal arrangement with a centrifugal ring for a sealing between a rotatable bearing part and a static bearing part. The centrifugal ring has a first end piece, which forms both an outer circumference of the centrifugal ring and a cutoff edge located on a disk-shaped outer face. The seal arrangement reduces the coefficient of friction without having to accept any loss of sealing effect, but in which the seal arrangement nevertheless remains cost-effective to manufacture. For this purpose, the centrifugal ring has a second end piece. The end pieces together form a first collecting channel in the vicinity of the cutoff edge and the end pieces each form an annular seal gap with a static bearing part.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: January 14, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Wilheim Walter, Erwin Hartmann
  • Patent number: 8500338
    Abstract: A steering knuckle, which is provided for receiving an outer ring of a wheel bearing, and a wheel bearing arrangement with such a steering knuckle. The sealing arrangements of the wheel bearing has a pre-seal, which is designed as a labyrinth seal to provide sealing for an appropriate gap geometry. To this end, the steering knuckle has a collecting channel, which captures liquids and dirt particles and discharges them at the periphery. The hearing seal can be changed by this measure, so that savings are possible with a minimum of sealing action of the conventional sealing arrangement and with greatly reduced friction torque. Overall, the sealing action, which is now achieved by the bearing seal and the pre-seal together, is increased or remains at least at the same level while manufacturing costs are reduced.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: August 6, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Wilhelm Walter, Erwin Hartmann
  • Publication number: 20120207417
    Abstract: A sealing ring for sealing a rolling chamber of a rolling bearing, which has a supporting part that is fixed to a first bearing part and retains an elastic part. The sealing ring seals the roiling chamber by a radial or axial sealing lip on the elastic part. The sealing ring lies between the first bearing part and a second bearing part that is rotatable relative to the first bearing part or lies between the first bearing part and another component fixed to the second bearing part and moveable relative to the first bearing part. A ring of lubricant is applied, formed and retained by an annular groove in a sealing lip and by the second bearing part or by the component. The ring of lubricant can also be shaped so that the ring of lubricant closes a gap between the sealing lip and the second bearing part or the components.
    Type: Application
    Filed: September 23, 2010
    Publication date: August 16, 2012
    Applicant: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventors: Wilhelm Walter, Erwin Hartmann
  • Patent number: 8240674
    Abstract: The invention relates to a seal with non-contact adjacent deflector rings, arranged concentrically to each other, about a common rotation axis, whereby, on a first deflector ring of the deflector rings, at least two axially-adjacent radial lips are embodied an said radial lips are embodied such as not to come into contact with a second deflector ring of the deflector rings and an annular hollow cavity is embodied between two axially-adjacent radial lips and the second deflector ring.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: August 14, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Erwin Hartmann, Wilhelm Walter
  • Patent number: 8152381
    Abstract: A rolling bearing which has a sealing arrangement and a sensor component, particularly an encoder, which is fitted with a mounting flange. The rolling bearing further has an inner ring and an outer ring between which rolling members are arranged. The sealing arrangement is equipped with at least one sealing element between the inner ring and the outer ring. In order to provide a rolling bearing which can easily be retrofitted with a retrofit sensor, particularly a retrofit encoder, and is well protected against environmental influence, the sensor component that is fitted with the mounting flange is designed as a retrofit part, while at least one water discharge port is disposed in the region of the mounting flange.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: April 10, 2012
    Assignee: Schaeffler KG
    Inventors: Wilhelm Walter, Alexander Haepp, Erwin Hartmann
  • Publication number: 20110150380
    Abstract: A seal arrangement with a centrifugal ring for a sealing between a rotatable bearing part and a static bearing part. The centrifugal ring has a first end piece, which forms both an outer circumference of the centrifugal ring and a cutoff edge located on a disk-shaped outer face. The seal arrangement reduces the coefficient of friction without having to accept any loss of sealing effect, but in which the seal arrangement nevertheless remains cost-effective to manufacture. For this purpose, the centrifugal ring has a second end piece. The end pieces together form a first collecting channel in the vicinity of the cutoff edge and the end pieces each form an annular seal gap with a static bearing part.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 23, 2011
    Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
    Inventors: Wilhelm WALTER, Erwin HARTMANN
  • Publication number: 20100158423
    Abstract: The invention relates to a bearing unit comprising a hub provided with a wheel-sided securing flange, whereon an angular contact anti-friction bearing is arranged. In order to produce the bearing unit and to operate it in an economical manner, and also to prevent, for example, deformation and tensions characteristic of known roller riveting units, the securing flange is connected in a material fit to the flange ring in relation to the end of the hub, which clamps at least the inner ring to the hub. The invention also relates to a method for producing a bearing unit, preferably, a wheel bearing unit for a motor vehicle, comprising a hub which is provided with a wheel-sided securing flange whereon an angular contact anti-friction bearing comprising at least one inner ring and an outer ring, is arranged, by means of a device which exerts a clamping force on the bearing unit.
    Type: Application
    Filed: September 29, 2006
    Publication date: June 24, 2010
    Applicant: SCHAEFFLER KG
    Inventor: Erwin Hartmann
  • Publication number: 20100111457
    Abstract: A rolling bearing which has a sealing arrangement and a sensor component, particularly an encoder, which is fitted with a mounting flange. The rolling bearing further has an inner ring and an outer ring between which rolling members are arranged. The sealing arrangement is equipped with at least one sealing element between the inner ring and the outer ring. In order to provide a rolling bearing which can easily be retrofitted with a retrofit sensor, particularly a retrofit encoder, and is well protected against environmental influence, the sensor component that is fitted with the mounting flange is designed as a retrofit part, while at least one water discharge port is disposed in the region of the mounting flange.
    Type: Application
    Filed: December 19, 2007
    Publication date: May 6, 2010
    Applicant: Schaeffler KG
    Inventors: Wilhelm Walter, Alexander Haepp, Erwin Hartmann
  • Publication number: 20100052265
    Abstract: The invention relates to a seal with non-contact adjacent deflector rings, arranged concentrically to each other, about a common rotation axis, whereby, on a first deflector ring of the deflector rings, at least two axially-adjacent radial lips are embodied an said radial lips are embodied such as not to come into contact with a second deflector ring of the deflector rings and an annular hollow cavity is embodied between two axially-adjacent radial lips and the second deflector ring.
    Type: Application
    Filed: November 9, 2009
    Publication date: March 4, 2010
    Applicant: SCHAEFFLER KG
    Inventors: Erwin HARTMANN, Wilhelm WALTER
  • Patent number: 7624989
    Abstract: The invention relates to a seal with non-contact adjacent deflector rings, arranged concentrically to each other, about a common rotation axis, whereby, on a first deflector ring of the deflector rings, at least two axially-adjacent radial lips are embodied an said radial lips are embodied such as not to come into contact with a second deflector ring of the deflector rings and an annular hollow cavity is embodied between two axially-adjacent radial lips and the second deflector ring.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: December 1, 2009
    Assignee: Schaeffler KG
    Inventors: Erwin Hartmann, Wilhelm Walter
  • Publication number: 20070085276
    Abstract: The invention relates to a seal with non-contact adjacent deflector rings, arranged concentrically to each other, about a common rotation axis, whereby, on a first deflector ring of the deflector rings, at least two axially-adjacent radial lips are embodied an said radial lips are embodied such as not to come into contact with a second deflector ring of the deflector rings and an annular hollow cavity is embodied between two axially-adjacent radial lips and the second deflector ring.
    Type: Application
    Filed: December 3, 2004
    Publication date: April 19, 2007
    Applicant: SCHAEFFLER KG
    Inventors: Erwin Hartmann, Wilhelm Walter
  • Patent number: 4979899
    Abstract: The scaler includes a housing which is an angle piece and includes a grip housing and an instrument housing positioned at an angle to the grip housing. A scraper is inserted in a bearing sleeve mounted in bearings in the instrument housing and can be moved into different angular positions relative to the circumference of the bearing sleeve and can be fixed by rotating a coupling ring. A drive shaft is mounted in the grip housing. The drive shaft at its end face is provided with an eccentrically positioned driving pin and a coaxial bearing pin. An eccentric member is pivotable within an angular range on the bearing pin. This range is determined by the size of a recess formed in the eccentric member. A spring-loaded rocker cooperates with the eccentric member to perform a rapid jerky movement of the scraper relative to the instrument housing when the eccentric surface formed in the eccentric member faces the rocker.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: December 25, 1990
    Assignees: Ludwig Romhild, Peter Reinhard
    Inventors: Ludwig Romhild, Erwin Hartmann
  • Patent number: 4854080
    Abstract: An apparatus for sharpening cutters of periodontal instruments comprises a base supported on a parallelogram formed by two carriers in which is mounted in rotary manner a grinding wheel. At the lower ends the carriers are mounted in a support plate, which is mounted by a pivot pin on a support arm of a swivel head. Below the carriers is displaceably mounted a link, which is coupled to the lower pivot pin of one of the carriers. During the rotary movement of the swivel head, the link is moved along a template, through which it is possible to adjust the angular position of the grinding wheel relative to the cutter in accordance with an eccentric relief or a bevel cut to be made. The grinding wheel is driven by a drive motor via an envelope drive, which is located in a casing, which receives all the elements of the rotating and fixed parts, with the exception of the base and the upper ends of the carriers.
    Type: Grant
    Filed: September 24, 1988
    Date of Patent: August 8, 1989
    Assignees: Mikrona, AG, Ludwig Romhild
    Inventors: Ludwig Romhild, Erwin Hartmann, Peter Reinhard
  • Patent number: 4820154
    Abstract: A dental instrument employs a tool having an upper portion for use in contacting teeth and a lower portion defining a shank with a lower end, a hollow elongated gripping holder having an opening at one end, a device in the holder communicating with the opening in the holder to removably receive said part of the shank, including the lower end; and a manually operated coupling mechanism having a first section connected to the holder and a second section on the shaft, the mechanism having a lock position at which the first section engages the second section in such a manner that the tool is locked in the holder in position for use, and having a release position at which the first and second sections are disengaging and the tool can be removed from the holder.
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: April 11, 1989
    Assignees: Ludwig Romhild, Peter Reinhard
    Inventors: Ludwig Romhild, Erwin Hartmann, Peter Reinhard
  • Patent number: 4820153
    Abstract: A process for treating periodontitis existing in the mouth of a patient having teeth with roots extending downwardly in the gums by using a scaler including a scraper with a cutting edge and a handle for the scraper. A dentist uses the scraper to remove tartar, concretions and necrotic root element from a tooth by guiding the cutting edge along the tooth root under the gums from the lowest point of the gum pocket and while exerting pressure on the root suddenly moving the cutting edge with a powerful jerk in scraping manner toward the chewing face of the tooth. The scaler is adapted for manual movement by the dentist and also has a mechanism which when actuated initiates and performs the jerk action without manual movement of the scraper by the dentist.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: April 11, 1989
    Assignees: Ludwig Romhild, Peter Reinhard
    Inventors: Ludwig Romhild, Erwin Hartmann, Peter Reinhard
  • Patent number: 4412729
    Abstract: A vision testing device, wherein projected or transilluminated indicia in the form of characters and/or symbols of different sizes and recognizabilities are shown to a subject under a test in a test field. The characters or symbols appear bright with a luminance of preferably about 70 cd/m.sup.2. A darker field surrounds the characters or symbols, with the darker field having a luminance of about one-fifth to one-eighth of the luminance of the characters or symbols. Brighter areas with a luminance of 250-1000 cd/m.sup.2 are provided adjacent the darker surrounding field.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: November 1, 1983
    Assignee: Optische Werke G. Rodenstock
    Inventor: Erwin Hartmann