Patents by Inventor David D. Hildreth

David D. Hildreth 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: 7686331
    Abstract: This invention relates generally to abrasion resistant and/or puncture resistant fabrics, coated, layered and/or laminated inflatable fabrics, and methods. More particularly, it concerns airbag cushions to which films, fabrics, layers, and/or coatings have been applied and which exhibit enhanced abrasion resistance and/or puncture resistance. The inventive inflatable fabrics are especially suited for use in automotive restraint cushions that require abrasion resistance and/or puncture resistance (such as side curtain airbags).
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: March 30, 2010
    Assignee: Milliken & Company
    Inventors: Shulong Li, Derek L. Bowen, Charles E. Willbanks, Ramesh Keshavaraj, David D. Hildreth
  • Publication number: 20030072915
    Abstract: A low particle generating wiper for use in a particle sensitive environment. The wiper is constructed at least partly of a textile fabric formed from a multiplicity of yarns including thermoplastic filaments. The wiper includes an interior surrounded by perimeter edges. The perimeter edges are constructed such that filaments within the yarns at the perimeter edge undergo a reduced occurrence of fracture under tension thereby potentially reducing particle generation during use.
    Type: Application
    Filed: October 12, 2001
    Publication date: April 17, 2003
    Inventors: Creighton C. Kelly, David D. Hildreth
  • Publication number: 20020122908
    Abstract: Typical road surfaces are concrete, and gravel filled asphalt. They are very abrasive to fabrics that slide on those surfaces. For the new side impact curtain-type airbag, in a rollover situation, the airbag needs to protect the occupant from directly contacting the road hazard and should not deflate quickly or break when sliding on such road surfaces. We have found that a layer of elastomer can provide much better abrasion resistance than a layer of heavy industrial fabric. A Jacquard bag coated with 1.2 oz/yd2 polyurethane showed significant increase in air leakage rate after 5 cycles of concrete sliding abrasion. A 3 mil thick polyurethane film was laminated to the coated Jacquard woven airbag. After 110 cycles of sliding abrasion using the same concrete, no visual damage or change in bag leakage was observed. This finding indicates surprisingly better abrasion resistance of a thin elastomer film than a heavy industrial fabric.
    Type: Application
    Filed: August 29, 2001
    Publication date: September 5, 2002
    Inventors: Shulong Li, Derek L. Bowen, Charles E. Willbanks, Ramesh Keshavaraj, David D. Hildreth