Patents by Inventor Petrus W. H. Schalk

Petrus W. H. Schalk 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: 6286209
    Abstract: Method of producing a contact terminal (1; 17; 18; 35; 36; 60) provided with a least a first contact surface (4; 25; 26; 64) for contacting e.g. a mating contact area (6; 18; 17) including at least the following steps: a) stamping the contact terminal from a) piece of blank having a substantially flat surface with a predetermined first width, said first contact surface (4; 25; 26; 64) being substantially perpendicular to said flat surface; b) pressing said first contact surface (4; 25; 26; 64) against a first, highly polished surface (27; 66) of a support tool (16), said first polished surface (27; 66) having a first predetermined shape; c) exerting a first predetermined force on said contact terminal in order to deform said first contact surface (4; 25; 26; 64) against said first, highly polished surface (27; 66) of said support tool (16), thus polishing said first contact surface.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: September 11, 2001
    Assignee: Berg Technology, Inc.
    Inventors: Niranjan K. Mitra, Petrus W. H. Schalk
  • Patent number: 5487684
    Abstract: An electrical contact pin is disclosed for mounting in a through hole in a printed circuit board. The contact pin has a pointed part and a longitudinal contact part which interacts with the hole when mounted therein. The cross-section of the contact part is generally H-shaped formed of four fins which project parallel to the longitudinal axis of the pin and are connected over the longitudinal distance of the contact part by a central cross rib and define two longitudinal recesses situated on either side of the cross rib. Each longitudinal recess has an essentially V-shaped floor. The contact part is made slightly curved at its short sides, each of which comprises two fins merging into each other over the entire longitudinal distance. The fins are also curved more inwardly by their fin ends starting from the pointed part over an appreciable part of the longitudinal distance. The curvature of the fin ends first gradually increasing starting at the pointed part, and then decreasing.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: January 30, 1996
    Assignee: Berg Technology, Inc.
    Inventors: Petrus W. H. Schalk, Paulus J. M. Pigmans
  • Patent number: 5387137
    Abstract: An electrical connector, comprising a housing provided with contact elements having connecting pins extending outside the housing having a connecting end for connecting electrical wiring, and a body made of plastically deformable synthetic material with parts which extend between the connecting pins. After the body has been fitted over the connecting pins, one or more of the parts of the body extending along the connecting pins is or are plastically deformed in such a manner that a barrier is produced to prevent the removal of the body.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: February 7, 1995
    Assignee: Berg Technology, Inc.
    Inventors: Johan H. P. Bouwknegt, Petrus W. H. Schalk