Patents by Inventor Laurent SAXOD

Laurent SAXOD 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).

  • Dry vacuum pump with a pressure variation reducing expansion device between a pumping side volume and an oil sump
    Patent number: 11499556
    Abstract: A dry vacuum pump includes: at least one oil sump; at least one pumping stage; two rotary shafts respectively supporting at least one rotor extending into the at least one pumping stage, the rotors being configured to rotate in a synchronized manner in the reverse direction in order to convey a gas to be pumped between an intake and an outlet of the vacuum pump, the shafts being supported by bearings lubricated by a lubricant contained in the at least one oil sump; at least one lubricant sealing device interposed between the at least one oil sump and a pumping stage at the shaft passage; and at least one expansion device configured to reduce the pressure variations between a pumping side volume and the at least one oil sump.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: November 15, 2022
    Assignee: PFEIFFER VACUUM
    Inventors: Laurent Saxod, Patrick Pilotti
  • DRY-TYPE VACUUM PUMP
    Publication number: 20210108638
    Abstract: A dry vacuum pump includes: at least one oil sump; at least one pumping stage; two rotary shafts respectively supporting at least one rotor extending into the at least one pumping stage, the rotors being configured to rotate in a synchronized manner in the reverse direction in order to convey a gas to be pumped between an intake and an outlet of the vacuum pump, the shafts being supported by bearings lubricated by a lubricant contained in the at least one oil sump; at least one lubricant sealing device interposed between the at least one oil sump and a pumping stage at the shaft passage; and at least one expansion device configured to reduce the pressure variations between a pumping side volume and the at least one oil sump.
    Type: Application
    Filed: March 27, 2019
    Publication date: April 15, 2021
    Inventors: Laurent SAXOD, Patrick PILOTTI