Patents by Inventor Robert I. Boersema

Robert I. Boersema 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).

  • VENT STRUCTURE FOR TENSIONER
    Publication number: 20150247558
    Abstract: A tensioner (24) for tensioning an endless drive member (14) on an accessory drive system or a cam shaft drive system is provided with a vent structure (99) that opens into a cavity (68) of the tensioner (24) to permit reduction of any pressure in the cavity (68) and the ambient environment of the tensioner (24), while inhibiting ingress of contaminants into the cavity (68). In some embodiments the vent structure (99) includes one or more of a mechanical one-way valve (152), a semi-permeable membrane (311) or a passageway with a circuitous path.
    Type: Application
    Filed: September 23, 2013
    Publication date: September 3, 2015
    Applicant: LITENS AUTOMOTIVE PARTNERSHIP
    Inventors: Gerald J. Hamers, Gary J. Spicer, Wei Ma, Robert I. Boersema, Lucas E. Wilson