Patents by Inventor Harlan F. Voss

Harlan F. Voss 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).

  • Method for forming a collared hole in sheet material
    Patent number: 5009095
    Abstract: A progressive die for producing collared holes in a sheet. The die includes a first station having a pattern of three punches producing three spaced apart holes in the sheet. A main punch at the second die station is extended into the three holes producing a single hole with portions of the sheet extending therein. The straightening punch mounted at the third station of the die has a diameter larger than the single main hole and is extended therethrough bending the portions extending into the hole outwardly forming a collar. The curling punch mounted at the fourth station of the die, curls the distal end of the collar outwardly.
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: April 23, 1991
    Assignee: Tridan Tool & Machine, Inc.
    Inventor: Harlan F. Voss
  • Progressive die for drawless fin
    Patent number: 5007275
    Abstract: A progressive die for producing collared holes in a sheet. The die includes a first station having a pattern of three punches producing three spaced apart holes in the sheet. A main punch at the second die station is extended into the three holes producing a single hole with portions of the sheet extending therein. The straightening punch mounted at the third station of the die has a diameter larger than the single main hole and is extended therethrough bending the portions extending into the hole outwardly forming a collar. The curling punch mounted at the fourth station of the die, curls the distal end of the collar outwardly.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: April 16, 1991
    Assignee: Tridan Tool & Machine, Inc.
    Inventor: Harlan F. Voss