Patents by Inventor Frederic Muller

Frederic Muller 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: 8136574
    Abstract: A multi-piece piston (1) is disclosed, for fixing to the high pressure side end (3) of a piston rod (5) running axially in a casting cylinder (7) of a cold chamber casting machine. The piston comprises a piston crown (9) forming a piston front face (13) on the high pressure side and a piston body (15) in the form of a bush connected to the piston crown (9) on the low pressure side. The piston body (15) can be connected to the piston crown (9) by means of fixing screws (23) to form a module. Complementary bayonet looking means (25, 27) are provided, for axial fixing of the piston (1) to the end (3) of the piston rod (5), on the piston crown (9) and the end (3).
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: March 20, 2012
    Assignee: Allper AG
    Inventors: André Müller, Frédéric Müller
  • Publication number: 20090139683
    Abstract: A multi-piece piston (1) is disclosed, for fixing to the high pressure side end (3) of a piston rod (5) running axially in a casting cylinder (7) of a cold chamber casting machine. The piston comprises a piston crown (9) forming a piston front face (13) on the high pressure side and a piston body (15) in the form of a bush connected to the piston crown (9) on the low pressure side. The piston body (15) can be connected to the piston crown (9) by means of fixing screws (23) to form a module. Complementary bayonet locking means (25, 27) are provided, for axial fixing of the piston (1) to the end (3) of the piston rod (5), on the piston crown (9) and the end (3).
    Type: Application
    Filed: October 11, 2006
    Publication date: June 4, 2009
    Inventors: Andre Muller, Frederic Muller
  • Patent number: 6567278
    Abstract: A power supply comprising a DC-DC converter which comprises (a) a first transformer (11); (b) a second transformer (12); (c) a first H-bridge switching circuit (13) for selectively connecting a primary DC source (14) to the primary winding of said first transformer; (d) a second H-bridge (15) switching circuit for selectively connecting said primary DC source (14) to the primary winding of said second transformer (12); (e) a bridge rectifier circuit (16) connected to the secondary windings of said first and second transformers; and (f) a control circuit (17) for providing sets of control pulses for effecting switching of switching elements of the first and the second H-bridge switching circuits (13, 15).
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: May 20, 2003
    Assignee: CP Automation S.A.
    Inventors: Alfred-Christophe Rufer, Claudio Zimmermann, Frédéric Muller, Albert Bulliard
  • Publication number: 20030021125
    Abstract: A power supply comprising a DC-DC converter which comprises
    Type: Application
    Filed: June 27, 2002
    Publication date: January 30, 2003
    Inventors: Alfred-Christophe Rufer, Claudio Zimmermann, Frederic Muller, Albert Bulliard