Patents by Inventor Ronald A. Plantinga

Ronald A. Plantinga 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).

  • High pressure discharge lamp with discharge vessel centered with clamping plates
    Patent number: 5594295
    Abstract: The high-pressure discharge lamp has a discharge vessel (1) with seals (2) on each of which a metal clamping plate (20) is present. The discharge vessel is accommodated in an outer bulb (10) which has cylindrical portions (12). The clamping plates (20) have transversely flanged rims (24, 25) from which elastic tongues (23) extend towards the outer bulb in tangential direction and press against a cylindrical portion (12) of the outer bulb with clamping force. The clamping plates (20) render it possible to suspend the discharge vessel (1) in the outer bulb (10), keeping the discharge vessel centered and forming a buffer in the case of shocks.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: January 14, 1997
    Assignee: U.S. Philips Corporation
    Inventors: Nicasius G. T. Van Gennip, Johannes A. A. M. Van Heeswijk, Ronald A. Plantinga
  • Luminaire
    Patent number: 5432690
    Abstract: The luminaire has a base wall (1) bearing contact elements (2, 3). These elements are bent from metal sheet to have a base (20) and opposite arms (2, 3) extending therefrom each having a contact portion (23, 24) to contact a lamp terminal (43). The arms (2, 3) cross one another between the contact portions (23, 24) and the base (20). The construction allows for a low height and a free choice of sheet material.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: July 11, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Bart Van der Vliet, Ronald A. Plantinga