Patents by Inventor Roberto Cerruti

Roberto Cerruti 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).

  • Pumping stage for a vacuum pump
    Patent number: 6877949
    Abstract: A pumping stage for a vacuum pump, has an improved geometry allowing an optimum trade-off to be achieved between the exhaust pressure and the pumping rate attained in that stage. In the pumping stage (1) the axial extension that is the height of the pumping channel (3) varies along the circumference of the channel (3) between the inlet port (13) and the outlet port (15).
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: April 12, 2005
    Assignee: Varian, S.p.A.
    Inventors: Roberto Cerruti, Silvio Giors
  • Vacuum pump
    Patent number: 6672828
    Abstract: A turbomolecular vacuum pump (5) comprises a first pumping section (1) having pumping stages with bladed rotor discs, a second pumping section (2) having pumping stages with smooth rotor discs, a third pumping section (3) having a pumping stage with a toothed rotor disc (26), and a fourth pumping section (4) of the ejector or venturi pump type. (FIG.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: January 6, 2004
    Assignee: Varian S.p.A.
    Inventor: Roberto Cerruti
  • VACUUM PUMP
    Publication number: 20030223860
    Abstract: A turbomolecular vacuum pump (5) comprises a first pumping section (1) having pumping stages with bladed rotor discs, a second pumping section (2) having pumping stages with smooth rotor discs, a third pumping section (3) having a pumping stage with a toothed rotor disc (26), and a fourth pumping section (4) of the ejector or venturi pump type. (FIG.
    Type: Application
    Filed: June 3, 2002
    Publication date: December 4, 2003
    Inventor: Roberto Cerruti
  • Pumping stage for a vacuum pump
    Publication number: 20030219337
    Abstract: The present invention relates to a pumping stage for a vacuum pump, having an improved geometry allowing an optimum trade-off to be achieved between the exhaust pressure and the pumping rate attained in that stage. The pumping stage (1) according to the invention is characterised in that the axial extension or height of the pumping channel (3) varies along the circumference of said channel (3) between the inlet port (13) and the outlet port (15).
    Type: Application
    Filed: May 5, 2003
    Publication date: November 27, 2003
    Inventors: Roberto Cerruti, Silvio Giors
  • Rotor for turbomolecular pump
    Patent number: 5938406
    Abstract: The present invention relates to a rotor of a vacuum pump comprising a rotatable shaft and a plurality of spaced apart parallel rotor disks secured to said rotatable shaft, such rotor being provided with a corrosion-resistant protective coating formed by a layer of polymeric material. The protective coating of the present invention may apply to any of the stationary or rotational parts which are disposed within a pump body and may be exposed to corrosive gases.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: August 17, 1999
    Assignee: Varian, Inc.
    Inventor: Roberto Cerruti
  • Rotor for turbomolecular pump
    Patent number: 5904469
    Abstract: The present invention relates to a rotor of a vacuum pump comprising a rotatable shaft and a plurality of spaced apart parallel rotor disks secured to said rotatable shaft, such rotor being provided with a corrosion-resistant protective coating formed by a layer of polymeric material.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: May 18, 1999
    Assignee: Varian Associates, Inc.
    Inventor: Roberto Cerruti
  • Turbomolecular pump
    Patent number: 5688106
    Abstract: A turbomolecular pump comprises a pump body housing a gas inlet and a gas exhaust port and a plurality of pumping assemblies with interleaved rotors and stators located within the pump body. The rotors are secured to a rotating shaft that is supported by at least one rotatable support and driven by a motor. At least one stator of the pumping assemblies is provided with at least one spiral channel adapted to push and eject the gases from an area proximal to the shaft toward an area distal from the shaft and vice versa.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: November 18, 1997
    Assignee: Varian Associates, Inc.
    Inventors: Roberto Cerruti, Giampaolo Levi