Patents by Inventor Michael A. Coffman

Michael A. Coffman 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).

  • Safety block device for use in a press device
    Patent number: 6938673
    Abstract: A safety block device for supporting a generally vertically movable component about a guide post of a press device. According to one embodiment of the invention, the safety block device includes a generally upright column (42) adapted to be disposed adjacent the guide post (18) and moveable between a retracted non-working position, wherein the column does not support the moveable component, and an extended working position, wherein the column is effective to support the moveable component and prevent movement thereof. The column includes an upper end portion and a lower end portion. According to one feature of the invention, the lower end portion of the column includes a generally rounded first portion (62a) and a generally second flat portion (62b) which is slightly offset with respect to the first portion.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: September 6, 2005
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Kenneth D. McKibben, Daniel D. Minor, Mark Salgat, Robert L. Macheske, Michael A. Coffman, Aleksander A. Filipov