Patents by Inventor Lutz Welke

Lutz Welke 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: 8454465
    Abstract: The invention is related to a toothed chain with alternating inner and outer chain links each joined by means of a chain joint, wherein the inner chain links comprise at least one inner plate and at least two joint bushes running perpendicularly through the same, the outer chain links comprise at least two outer plates and at least two joint pins running perpendicularly through the same, and to form a chain joint, one joint pin of the outer chain link each extends through a joint bush of the inner chain link, and at least one inner plate of the inner chain link and/or at least one outer plate of the outer chain link is embodied as a toothed plate with each two teeth defined by an outer flank and an inner flank each.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: June 4, 2013
    Assignee: Iwis Motorsysteme GmbH & Co. KG
    Inventors: Andreas Bongard, Volker Hirschmann, Lutz Welke
  • Patent number: 8113975
    Abstract: The invention relates to a chain wheel (2, 3), especially for a timing chain drive, with a rotary shaft, a sprocket wheel (7) positioned around the rotary shaft featuring multiple alternating teeth (17) and tooth gaps (16) distributed around its circumference, as well as at least one chain guide (8), the sprocket wheel (7) and the chain guide (8) are rigidly joined, the chain guide (8) incorporates a contoured surrounding support cage (9) causing it to bear on contact faces of link plates (13, 14) and the support cage (9) or raised regions of the support cage (9) extend along a curved circumference that constitutes the perimeter of the chain guide (8), said perimeter of the chain guide (8) having a non-circular profile.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: February 14, 2012
    Assignee: IWIS Motorsysteme GmbH & Co. KG
    Inventors: Andreas Ritz, Lutz Welke, Volker Hirschmann
  • Publication number: 20100004083
    Abstract: The invention is related to a toothed chain with alternating inner and outer chain links each joined by means of a chain joint, wherein the inner chain links comprise at least one inner plate and at least two joint bushes running perpendicularly through the same, the outer chain links comprise at least two outer plates and at least two joint pins running perpendicularly through the same, and to form a chain joint, one joint pin of the outer chain link each extends through a joint bush of the inner chain link, and at least one inner plate of the inner chain link and/or at least one outer plate of the outer chain link is embodied as a toothed plate with each two teeth defined by an outer flank and an inner flank each.
    Type: Application
    Filed: October 31, 2006
    Publication date: January 7, 2010
    Applicant: IWIS MOTORSYSTEME GmbH & Co. KG
    Inventors: Andreas Bongard, Volker Hirschmann, Lutz Welke
  • Publication number: 20090275434
    Abstract: The invention relates to a chain wheel (2, 3), especially for a timing chain drive, with a rotary shaft, a sprocket wheel (7) positioned around the rotary shaft featuring multiple alternating teeth (17) and tooth gaps (16) distributed around its circumference, as well as at least one chain guide (8), the sprocket wheel (7) and the chain guide (8) are rigidly joined, the chain guide (8) incorporates a contoured surrounding support cage (9) causing it to bear on contact faces of link plates (13, 14) and the support cage (9) or raised regions of the support cage (9) extend along a curved circumference that constitutes the perimeter of the chain guide (8), said perimeter of the chain guide (8) having a non-circular profile.
    Type: Application
    Filed: January 5, 2007
    Publication date: November 5, 2009
    Applicant: IWIS MOTORSYSTEME GMBH & CO. KG
    Inventors: Andreas Ritz, Lutz Welke, Volker Hirschmann