Patents by Inventor Peter W. De Haas

Peter W. De Haas 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).

  • Method of polishing a surface of copper or an alloy comprising mainly copper
    Patent number: 5622525
    Abstract: Method of polishing a surface (5a) of copper or an alloy comprising mainly copper, in which a polishing means is moved across the surface while exerting a polishing pressure of approximately 500 g/cm.sup.2 for obtaining a plane and smooth polished surface without any defects. A composition of a polishing component comprising a colloidal suspension of SiO.sub.2 particles having an average particle size of between 20 and 50 nm in an alkali solution, demineralized water and a chemical activator is used as a polishing means.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: April 22, 1997
    Assignee: U.S. Philips Corporation
    Inventors: Jan Haisma, Peter W. De Haas, Dirk K. G. De Boer, Waltherus W. Van den Hoogenhof, Lambertus Postma
  • Electrical machine and method of manufacturing the electrical machine
    Patent number: 5547119
    Abstract: The method of intimately joining a hard magnetic part to a soft magnetic part in the manufacture of an electrical machine comprising polishing the joining surfaces such that the surface roughness hight is about less than or equal to two nanometers and joining the parts by direct bonding.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: August 20, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Jan Haisma, Evert M. H. Kamerbeek, Gijsbertus A. C. M. Spierings, Peter W. De Haas
  • Electrical machine with directly bonded magnetic parts
    Patent number: 5483115
    Abstract: An electrical machine comprises a stationary first section (1) and a second section (5) which is movable relative to the stationary section. At least one of the sections comprises a soft-magnetic part (7) and a hard-magnetic part (9). A surface (7a) of the soft-magnetic part and a surface (9a) of the hard-magnetic part are fixed intimately to one another by direct bonding.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: January 9, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Jan Haisma, Evert M. H. Kamerbeek, Gijsbertus A. C. M. Spierings, Peter W. De Haas
  • Method of manufacturing a plate having a plane main surface, method of manufacturing a plate having parallel main surfaces, and device suitable for implementing said methods
    Patent number: 5441442
    Abstract: Methods and device for manufacturing a plate with a plane main surface or with parallel main surfaces, whereby material is taken off from the edges of the plate and from the central portion of the plate alternately by means of polishing in order to obtain main surfaces having a convex, plane, or concave shape. Polishing is stopped after at least one transition from convex to concave or vice versa at the moment at which the main surface has a substantially plane shape or has substantially parallel main surfaces.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: August 15, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Jan Haisma, Peter W. De Haas, Franciscus J. H. M. Van Der Kruis, Jakob Vijfvinkel