Patents by Inventor Stefan Ledig

Stefan Ledig 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: 20230375089
    Abstract: The invention relates to a mechanical seal arrangement comprising a first mechanical seal (2) having a first rotating sliding ring (22) and a first stationary sliding ring (21) defining a first sealing gap (20) therebetween, a second mechanical seal (3) having a second rotating sliding ring (22) and a second stationary sliding ring (32) defining a second sealing gap (30) therebetween, a housing (4) having an inlet (40) and an outlet (41) for a cooling liquid, a rotating conveying sleeve (5) joined to the first rotating sliding ring (22) and the second rotating sliding ring (32), the conveying sleeve (5) having a plurality of conveying grooves (50) on its outer circumference wherein the first stationary sliding ring (21) is arranged radially outside the conveying sleeve (5) and has an inner circumference (21a) which is arranged eccentrically with respect to an outer circumference (50a) of the conveying sleeve (5) so that a circumferential eccentric gap (6) is formed between the outer circumference (50a) of the
    Type: Application
    Filed: November 2, 2021
    Publication date: November 23, 2023
    Applicant: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Stefan Ledig, Martin Kuntz
  • Patent number: 11619307
    Abstract: The invention relates to a mechanical seal arrangement for sealing on a rotating component (21), comprising a slide ring seal (2) having a rotating slide ring (3) and a stationary slide ring (4), which define a sealing gap (5) between the sliding surfaces (3a, 4a) thereof, a recirculation conveyor (7) arranged adjacent to the rotating slide ring (3) wherein the recirculation conveyor (7) comprises a recirculation line (19) in which a cooling device (20) for cooling the recirculated fluid is arranged, a recirculation rotor (8) and a hollow cylindrical housing (9), wherein the recirculation line (19) leads to a cavity (6) in the region of the sealing gap (5) of the sliding ring seal (2), wherein the hollow cylindrical housing (9) comprises an inner shell surface (11) and an outer shell surface (12) and wherein a conveyor channel (10) is provided on the outer shell surface (12), which conveyor channel (10) is formed along the outer shell surface (12) from a start portion (13) to an end portion (14) wherein the s
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: April 4, 2023
    Assignee: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Kilian Obertanner, Johannes Bauer, Josef Gerg, Stefan Ledig, Joseph Kiermeir, Christoph Rapp
  • Publication number: 20220221060
    Abstract: The invention relates to a mechanical seal arrangement for sealing on a rotating component (21), comprising a slide ring seal (2) having a rotating slide ring (3) and a stationary slide ring (4), which define a sealing gap (5) between the sliding surfaces (3a, 4a) thereof, a recirculation conveyor (7) arranged adjacent to the rotating slide ring (3) wherein the recirculation conveyor (7) comprises a recirculation line (19) in which a cooling device (20) for cooling the recirculated fluid is arranged, a recirculation rotor (8) and a hollow cylindrical housing (9), wherein the recirculation line (19) leads to a cavity (6) in the region of the sealing gap (5) of the sliding ring seal (2), wherein the hollow cylindrical housing (9) comprises an inner shell surface (11) and an outer shell surface (12) and wherein a conveyor channel (10) is provided on the outer shell surface (12), which conveyor channel (10) is formed along the outer shell surface (12) from a start portion (13) to an end portion (14) wherein the s
    Type: Application
    Filed: February 25, 2020
    Publication date: July 14, 2022
    Applicant: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Kilian Obertanner, Johannes Bauer, Josef Gerg, Stefan Ledig, Joseph Kiermeir, Christoph Rapp
  • Patent number: 9695941
    Abstract: The present invention relates to a mechanical seal arrangement, comprising a rotating slide ring and a stationary slide ring, which define a sealing gap between them, and a delivery device for delivering a fluid, wherein the delivery device comprises a sleeve-like basic body with first through-openings and second through-openings, wherein the delivery device rotates jointly with the rotating slide ring, wherein the first through-openings each have a first entry region on an outer periphery of the sleeve-like basic body and a first exit region on an inner periphery of the sleeve-like basic body, and wherein the second through-openings each have a second entry region on the inner periphery of the sleeve-like basic body and a second exit region on the outer periphery of the sleeve-like basic body.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: July 4, 2017
    Assignee: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Joseph Fichtner, Stefan Ledig, Joachim Skrzidlo, Rudolf Kollinger, Thomas Bohm, Daniel Frohlich
  • Publication number: 20160356383
    Abstract: The present invention relates to a mechanical seal arrangement, comprising a rotating slide ring and a stationary slide ring, which define a sealing gap between them, and a delivery device for delivering a fluid, wherein the delivery device comprises a sleeve-like basic body with first through-openings and second through-openings, wherein the delivery device rotates jointly with the rotating slide ring, wherein the first through-openings each have a first entry region on an outer periphery of the sleeve-like basic body and a first exit region on an inner periphery of the sleeve-like basic body, and wherein the second through-openings each have a second entry region on the inner periphery of the sleeve-like basic body and a second exit region on the outer periphery of the sleeve-like basic body.
    Type: Application
    Filed: February 12, 2015
    Publication date: December 8, 2016
    Inventors: Joseph Fichtner, Stefan Ledig, Joachim Skrzidlo, Rudolf Kollinger, Thomas Bohm, Daniel Frohlich
  • Publication number: 20160341317
    Abstract: The present invention relates to a mechanical seal arrangement comprising: a mechanical seal (2) having a rotating slide ring (3) and a stationary slide ring (4) which define a sealing gap (5) therebetween, and a housing component (6) having an inner peripheral region (60), wherein the housing component (6) includes an outlet opening (7) for discharging a fluid, guided to the slide rings, and an inflow region, and wherein the inflow region comprises at least one transition channel (8; 9) which extends in the circumferential direction, becomes continually deeper towards the outlet opening (7), is formed in the housing component (6) and opens at the outlet opening (7).
    Type: Application
    Filed: October 27, 2014
    Publication date: November 24, 2016
    Inventors: Joseph Fichtner, Stefan Ledig, Alfred Matuschek, Ernst Pochmann, Joachim Skrzidlo
  • Publication number: 20140308112
    Abstract: The present invention refers to a mechanical seal assembly, comprising at least one mechanical seal (2) with a rotating seal ring (21) and a stationary seal ring (22), the rotating seal ring (21) and the stationary seal ring (22) defining a sealing gap (23) between them, and a Tesla pump (6) co-rotating with the rotating seal ring (21).
    Type: Application
    Filed: October 8, 2012
    Publication date: October 16, 2014
    Applicant: EAGLEBURGMANN GERMANY GMBH & CO. KG
    Inventors: Stefan Ledig, Thomas Boehm, Rudolf Kollinger