Patents by Inventor Ralf Heldmann

Ralf Heldmann 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).

  • Publication number: 20220278518
    Abstract: Busbar comprising a supporting body (1) made of a tough-hard material, and at least one electrical conductor (2.1, 2.2, 2.3, . . . ), wherein the conductor (2.1, 2.2, 2.3, . . . ) is connected to the supporting body (1). The supporting body (1) comprises a seal (3) that is made of a rubber-elastic material, which encloses the conductor (2.1, 2.2, 2.3, . . . ) on the outer circumferential side with an annular sealing region (4) in a sealing manner.
    Type: Application
    Filed: February 24, 2022
    Publication date: September 1, 2022
    Inventors: Rouven Ratfisch, Ralf Heldmann, Guenter Ziegler, Markus Clemens, Juergen Mall
  • Patent number: 9388921
    Abstract: A plug-in piece 1 for sealing connection of two mutually assigned cylindrical surfaces includes an essentially tubular support body 2, which on its ends exhibits annularly encircling sealing elements, which can be made to engage to produce a sealing connection with the cylindrical surfaces to be sealed, wherein at least one of the sealing elements is configured as an annularly encircling sealing bead 3, 30 on the outer surface of the support body 2, with a spherically curved sealing surface. Provision is made that the spherical radius of the sealing surface (3, 30) is chosen so that the center of the sphere is roughly at the axis of support body (2) symmetry. Thus, the compression forces are ensured to remain largely constant, independent of the angular setting over the entire surface of the sealing bead.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: July 12, 2016
    Assignee: Carl Freudenberg KG
    Inventors: Hans Unger, Ralf Heldmann, Ingo Stephan, Markus Clemens, Carsten Hartmann, Ernst Jakob, Stephan Reddig
  • Publication number: 20150152754
    Abstract: A seal including a sealing ring (1) made from an elastomeric material, an intermediate ring (2) made from a polymeric material, and a supporting ring (3), the sealing ring (1), the intermediate ring (2) and the supporting ring (3) being arranged concentrically with respect to one another, and the sealing ring (1) and the supporting ring (3) being arranged in each case on the sides of the intermediate ring (2) which face away axially from one another. The sealing ring (1), the intermediate ring (2), and the supporting ring (3) form a pre-assembled unit (4).
    Type: Application
    Filed: June 3, 2014
    Publication date: June 4, 2015
    Applicant: CARL FREUDENBERG KG
    Inventors: Ralf HELDMANN, Markus CLEMENS, Ernst JAKOB, Günter ZIEGLER
  • Patent number: 9016698
    Abstract: A seal including a tubular carrier body (1) and two annular sealing elements (2, 3), wherein the carrier body (1) on both sides of its front face is respectively enclosed by one of the sealing elements (2, 3) on the side of its outer perimeter forming a seal. At least one of the sealing elements (2, 3) is made of a non-elastomeric high-temperature resistant sealing material.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: April 28, 2015
    Assignee: Carl Freudenberg KG
    Inventors: Thomas Jäck, Hans Unger, Ralf Heldmann, Reiner Dirr
  • Publication number: 20140091532
    Abstract: A plug-in piece for sealing connection of two mutually assigned cylindrical surfaces includes an essentially tubular support body which on its ends exhibits annularly encircling sealing elements with a spherically curved sealing surface with a fluting formed therein.
    Type: Application
    Filed: August 23, 2013
    Publication date: April 3, 2014
    Applicant: CARL FREUDENBERG KG
    Inventors: Hans UNGER, Ralf HELDMANN, Ingo STEPHAN, Markus CLEMENS, Carsten HARTMANN, Ernst JAKOB, Stephan REDDIG
  • Publication number: 20140091533
    Abstract: A plug-in piece 1 for sealing connection of two mutually assigned cylindrical surfaces includes an essentially tubular support body 2, which on its ends exhibits annularly encircling sealing elements, which can be made to engage to produce a sealing connection with the cylindrical surfaces to be sealed, wherein at least one of the sealing elements is configured as an annularly encircling sealing bead 3, 30 on the outer surface of the support body 2, with a spherically curved sealing surface. Provision is made that the spherical radius of the sealing surface (3, 30) is chosen so that the center of the sphere is roughly at the axis of support body (2) symmetry. Thus, the compression forces are ensured to remain largely constant, independent of the angular setting over the entire surface of the sealing bead.
    Type: Application
    Filed: August 28, 2013
    Publication date: April 3, 2014
    Applicant: Carl Freudenberg KG
    Inventors: Hans UNGER, Ralf HELDMANN, Ingo STEPHAN, Markus CLEMENS, Carsten HARTMANN, Ernst JAKOB, Stephan REDDIG
  • Publication number: 20130038028
    Abstract: A seal including a tubular carrier body (1) and two annular sealing elements (2, 3), wherein the carrier body (1) on both sides of its front face is respectively enclosed by one of the sealing elements (2, 3) on the side of its outer perimeter forming a seal. At least one of the sealing elements (2, 3) is made of a non-elastomeric high-temperature resistant sealing material.
    Type: Application
    Filed: August 1, 2012
    Publication date: February 14, 2013
    Applicant: CARL FREUDENBERG KG
    Inventors: Thomas Jäck, Hans Unger, Ralf Heldmann, Reiner Dirr