Patents by Inventor David A. Winkel

David A. Winkel 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).

  • Notching construction and method
    Patent number: 6217222
    Abstract: A configuration that promotes cleaner fracture by reducing or eliminating secondary fractures includes a plurality of distinct interconnecting regions defining a plurality of separate fracture regions that are separated by an interruption.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: April 17, 2001
    Assignee: SKF USA Inc.
    Inventors: Arthur Mattson, Mark J. Cutler, Jerry Meyer, Keith Meyers, David A. Winkel
  • Composite shell for protecting an antenna of a formation evaluation tool
    Patent number: 5212495
    Abstract: A fiber reinforced polymer matrix composite shell for covering the elastomeric layer surrounding the antenna of a measurement-while-drilling borehole formation evaluation tool is disclosed. The shell protects the elastomeric layer and associated antenna from wear and abrasion. If damaged during drilling, the shell may be replaced at the drillsite with minimal downtime.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: May 18, 1993
    Assignee: Teleco Oilfield Services Inc.
    Inventors: David A. Winkel, Mark M. Bochain