Patents by Inventor Stephen K. Chatham

Stephen K. Chatham 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: 6334381
    Abstract: An adjustable punch assembly is provided for use at an indexable punching station in a turret punch press. The overall length of the punch assembly may be adjusted using a motor and pulley system that is also used for indexing the punch tool. Further, the punch assembly includes a quick disconnect connection between the punch driver and the punch tip that facilitates the changing of the punch tip.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: January 1, 2002
    Assignee: Strippit, Inc.
    Inventor: Stephen K. Chatham
  • Patent number: 5934165
    Abstract: An adjustable punch assembly is provided for use at an indexable punching station in a turret punch press. The overall length of the punch assembly may be adjusted using a motor and pulley system that is also used for indexing the punch tool. Further, the punch assembly includes a quick disconnect connection between the punch driver and the punch tip that facilitates the changing of the punch tip.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: August 10, 1999
    Assignee: Strippit, Inc.
    Inventor: Stephen K. Chatham
  • Patent number: 5271303
    Abstract: A device for selectively securing a stripper assembly on a punch guide assembly. A resiliently biased plunger is disposed adjacent the guide assembly, and selectively maintains the stripper assembly in a predetermined rotational position relative to the guide assembly. The stripper assembly includes at least one retaining projection, and the guide assembly includes at least one flange for selective engagement with the retaining projection to secure the stripper assembly and the guide assembly against relative axial movement. A method is disclosed including the steps of placing the stripper assembly on the guide assembly, and affecting relative movement between the stripper assembly and the guide assembly to cause the retaining projection to engage the flange, and the plunger to be received in a locator slot on the stripper assembly.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: December 21, 1993
    Assignee: Strippit, Inc.
    Inventor: Stephen K. Chatham
  • Patent number: 5127293
    Abstract: A device for selectively securing a stripper plate on a punch guide assembly. The device includes an annular retaining ring adapted to retain the stripper plate on the guide assembly. A resiliently biased plunger is disposed adjacent the guide assembly, and selectively maintains the retaining ring in a predetermined rotational position relative to the guide assembly. The retaining ring includes at least one retaining surface, and the guide assembly includes at least one flange for selective engagement with the retaining surface to secure the retaining ring and guide assembly against relative axial movement. A method is disclosed including the steps of placing the stripper plate on the guide assembly, placing the retaining ring on the stripper plate, and affecting relative movement between the retaining ring and the guide assembly to cause the retaining projection to engage the flange, and the plunger to be received in a locator slot on the retaining ring.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: July 7, 1992
    Assignee: Strippit, Inc.
    Inventor: Stephen K. Chatham