Patents by Inventor Thorsten Burggraf

Thorsten Burggraf 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).

  • MEMBRANE VACUUM PUMP
    Publication number: 20150010409
    Abstract: A membrane vacuum pump includes at least one membrane pump stage, at least one inlet valve for a process gas to be conveyed associated with the membrane pump stage, and at least one gas ballast valve for the supply of a ballast gas. The flow path for the ballast gas, leading through the gas ballast valve, opens into the flow path for the process gas behind the inlet valve in the direction of flow of the process gas.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 8, 2015
    Inventors: Thorsten BURGGRAF, Juergen WISSNER
  • PUMPING SYSTEM FOR EVACUATING GAS FROM A PLURALITY OF CHAMBERS AND METHOD FOR CONTROLLING THE PUMPING SYSTEM
    Publication number: 20130259711
    Abstract: A pumping system for evacuating gas from a plurality of chambers, includes at least one turbomolecular pump, at least two fore-vacuum pumps, at least one connection conduit extending between the at least two fore-vacuum pumps. and at least one transverse constriction for at least one of reducing and regulating gas flow.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 3, 2013
    Applicant: Pfeiffer Vaccum GmbH
    Inventors: Thorsten BURGGRAF, Jan HOFMANN, Tobias STOLL
  • Piston machine with ported piston head
    Patent number: 7241120
    Abstract: A piston machine includes a cylindrical wall (2) defining a swept volume (1) and having a plurality of gas inlet openings (5), and a piston (3) reciprocating in the swept volume (1), and the piston head (12) of which is formed as a valve having a plurality of openings (14) provided in the piston head (12), and a forcelocking device (16, 21; 18, 24) for retaining the plurality of openings (14) in one of their open condition and closed condition.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: July 10, 2007
    Assignee: Pfeiffer Vacuum GmbH
    Inventors: Eckard Bez, Thorsten Burggraf, Stefan Zabeschek
  • Piston machine for delivering gases
    Publication number: 20040071574
    Abstract: A piston machine includes a cylindrical wall (2) defining a swept volume (1) and having a plurality of gas inlet openings (5), and a piston (3) reciprocating in the swept volume (1), and the piston head (12) of which is formed as a valve having a plurality of openings (14) provided in the piston head (12), and a forcelocking device (16, 21; 18, 24) for retaining the plurality of openings (14) in one of their open condition and closed condition.
    Type: Application
    Filed: October 8, 2003
    Publication date: April 15, 2004
    Inventors: Eckard Bez, Thorsten Burggraf, Stefan Zabeschek