Patents by Inventor Jan-Eric Andersson

Jan-Eric Andersson 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).

  • Torch for plasma cutting and welding, including means for centering and clamping the electrode
    Patent number: 5101088
    Abstract: A torch for plasma cutting and welding which includes an outwardly insulated metal casing (10, 11, 12) provided with a non-melting electrode centered therein and having an insert (36) of active material directly opposite a nozzle orifice (17) in one end of the casing. The electrode (31) is centered in the casing by an insulating ring (21) at the electrode tip adjacent said orifice (17), and by an adapter sleeve (34) arranged in the opposite end and having a spring member (40). The adapter sleeve (34) has a tapered opening for receiving the likewise tapered end (33) of the electrode (31) and is axially slotted (35) to expand radially when receiving the electrode (31), so as to engage with the interior of the casing for safe current supply form the casing to the electrode (31). Gas is supplied from an inlet (27) along the electrode (31) and is forced to pass inclined ducts (41) in the electrode (31) in the area of the insulating ring (21), so as to be conducted in a spiral motion adjacent the orifice (17).
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: March 31, 1992
    Assignee: S P T Plasmateknik Aktiebolag
    Inventors: Jan-Eric Andersson, Hamid Shojai