Patents by Inventor Adriaan Van der Grijn

Adriaan Van der Grijn 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 for the manufacture of steel products of a precipitation hardened martensitic steel, steel products obtained with such method and use of said steel products
    Publication number: 20030094218
    Abstract: A method for the manufacture of steel products and products thus produced, wherein steel is subjected to precipitation hardening in a martensitic structure subsequent to soft annealing and thereafter shaping. The method steps include shaping followed by solution annealing between 1200° C. and 1050° C., quenching from the solution annealing temperature with a quenching speed of at least 5° C. per second to a temperature below 500° C., subjecting said steel to an isothermal martensitic transformation and subsequently hardening the steel at a temperature between 450° C. and 550° C. to precipitate particles out from solution into said martensitic structure.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 22, 2003
    Inventors: Jan-Olof Nilsson, Soren Olsson, Hubert Sjoerd Blaauw, Adriaan Van der Grijn
  • Method for the manufacture of steel products of a precipitation hardened martensitic steel, steel products obtained with such method and use of said steel products
    Patent number: 6531007
    Abstract: A method for the manufacture of steel products and products thus produced, wherein steel is subjected to precipitation hardening in a martensitic structure subsequent to soft annealing and thereafter shaping. The method steps include shaping followed by solution annealing between 1200° C. and 1050° C., quenching from the solution annealing temperature with a quenching speed of at least 5° C. per second to a temperature below 500° C., subjecting said steel to an isothermal martensitic transformation and subsequently hardening the steel at a temperature between 450° C. and 550° C. to precipitate particles out from solution into said martensitic structure.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: March 11, 2003
    Assignees: Sandvik AB, Koninklijke Philips Electronics, N.V.
    Inventors: Jan-Olof Nilsson, Sören Olsson, Hubert Sjoerd Blaauw, Adriaan Van der Grijn
  • Thermally controlled electrical switching device having a snap-action switch
    Patent number: 5870013
    Abstract: The invention relates to a thermally controlled electrical switching device including a temperature control (1) having a snap-action switch (2) including a fixed contact (4) and a movable contact (3) connected to a metal snap-action switching spring (9), and having a bimetallic element (5) which influences the movement of the movable contact. In order to minimize the heat produced in the mechanically loaded parts (17, 18) of the snap-action switching spring (9) the switching devices limits the current through these mechanically loaded parts. These devices may include an electrically well conductive layer (30) provided on the non-mechanically loaded parts of the snap-action switching spring or a layer (31) having a high electrical resistance deposited on the mechanically loaded parts (17, 18).
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: February 9, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Adriaan Van Der Grijn, Sikke Havinga
  • Shaving unit for a shaver and shaver comprising such a shaving unit
    Patent number: 5170563
    Abstract: A shaving unit for a shaver is provided comprising a shear plate and a cutting member, one of the cooperating surfaces being covered with a friction-reducing layer comprising carbon and metal in an atomic ratio between 50.1/49.9 and 99.9/0.1.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: December 15, 1992
    Assignee: U.S. Philips Corp.
    Inventors: Adriaan Van der Grijn, Hendrik W. Strijker, Heinz Dimigen, Hubertus Hubsch