Patents by Inventor Helmut Rolf

Helmut Rolf 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: 4802868
    Abstract: An improved contact spring connector strip of the type having a housing forming contact chambers and inlets, contact sets in the chambers, and a cover with passageways. The contact sets include springs, which engage stops formed in the inside wall of the housing and have a pair of spring clips, and push-in pins insertable between the clips. Flanges formed on the inside wall separate the clips and extend to ends tapered toward the cover, and have flange end portions with recesses which receive transverse tabs on the push-in pin to firmly support the push-in pin.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: February 7, 1989
    Assignee: Leonhardy GmbH
    Inventors: Helmut Rolf, Werner Bock
  • Patent number: 4698026
    Abstract: A terminal connection pin for solderless connections comprising a press-fit section which is insertable into a contact through bore of a printed circuit board to provide a solderless electrical and mechanical connection between the terminal connection pin and the contact through bore of the printed circuit board, wherein the terminal connection pin has a generally square cross section with an enlarged press-fit section having a groove extending parallel to its longitudinal axis and providing at least two contact paths in an axial direction which are opposite one another and have a limited flexibility.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: October 6, 1987
    Assignee: Leonhardy GmbH
    Inventor: Helmut Rolf