Patents by Inventor Stephan Hoffarth

Stephan Hoffarth 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: 6614640
    Abstract: The surge arrester has an arrester housing, two electrical power connections (16, 17) which are routed out of the arrester housing, and at least one varistor, which is arranged in the arrester housing (1, 2), is in the form of a disc and has two contact points which are provided on the end faces. The contact points are each electrically conductively connected to one of the two electrical power connections (16, 17). The varistor contains a non-metallized active part (12) and two elastic contact elements (11, 13) which are pressed against the end faces of the active part (12), forming an electrical contact. The end surfaces (12a, 12b) may be convex or concave instead of being plane-parallel and, if they are in the desired plane-parallel form, form a small angle with respect to one another. The elastic contact elements (11, 13) and the non-metallized end surfaces (12a, 12b) allow good electrical contact in all cases.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: September 2, 2003
    Assignee: ABB Schweiz AG
    Inventors: Bernhard Richter, Stephan Hoffarth, Michael Hagemeister
  • Publication number: 20010019471
    Abstract: The surge arrester has an arrester housing, two electrical power connections (16, 17) which are routed out of the arrester housing, and at least one varistor, which is arranged in the arrester housing (1, 2), is in the form of a disc and has two contact points which are provided on the end faces. The contact points are each electrically conductively connected to one of the two electrical power connections (16, 17).
    Type: Application
    Filed: January 10, 2001
    Publication date: September 6, 2001
    Inventors: Bernhard Richter, Stephan Hoffarth, Michael Hagemeister