Patents by Inventor Ingemar Per Persson

Ingemar Per Persson 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).

  • Initiation device for explosive charge
    Patent number: 3973498
    Abstract: There is disclosed a spot welding device for spot welding metal parts by explosive force. The device comprises two plugs tightly fitted into a rigid tubular member and so spaced and shaped that a transverse substantially conical space is formed between the two plugs. This space is filled with a suitable explosive material which can be exploded by a detonator activated when desired by an igniter. The explosive force generated upon detonation of the explosive material produces a generally annular spot weld when the device is placed with one of its ends upon metal parts to be welded.
    Type: Grant
    Filed: May 22, 1974
    Date of Patent: August 10, 1976
    Assignee: Nitro-Nobel A.B.
    Inventor: Ingemar Per Persson