Patents Assigned to Frewitt Fabrique de Machines SA
  • Patent number: 11440019
    Abstract: A milling device for implementing a milling operation including a milling unit having a body including a milling chamber that can be filled with a material to be milled, a rotor mounted so as to be able to rotate around a shaft in the body, a screen, and a drive unit controlling the movements of the rotor with respect to the screen during the milling operation. The drive unit is designed to impart an oscillating movement to the rotor around the shaft, the oscillation angle being variable during the milling operation. The milling chamber is configured to direct the product to be milled in a direction substantially parallel to the rotation shaft of the rotor.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: September 13, 2022
    Assignee: FREWITT FABRIQUE DE MACHINES SA
    Inventor: Antoine Virdis
  • Patent number: 11376602
    Abstract: A vacuum grinding system having multiple elements connected in series. The elements include an input chamber next to the system input, which chamber can be fluidically connected to a vacuum pump; a grinding chamber which is arranged downstream of the input chamber and which can be fluidically connected to a vacuum pump; and an output chamber, downstream of the grinding chamber and next to the output system, which output chamber can also be fluidically connected to a vacuum pump.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: July 5, 2022
    Assignee: FREWITT FABRIQUE DE MACHINES SA
    Inventors: Antoine Virdis, Christophe Pasquier
  • Patent number: 10926271
    Abstract: A grinding device including a rotor, mounted in rotational manner around an axle and having a plurality of blades extending radially relative to the axle. A sieve has a plurality of openings, with the sieve being mounted around the rotor so as to turn around the axle in the direction opposite the direction of rotation of the rotor. The rotor and sieve each has a height extending parallel to the axle and a width extending perpendicular to the axle wherein the width is between 1 mm and 20 mm. The rotation of the rotor and of the sieve is adjustable so as to reach a difference in circumferential speed between the rotor and the sieve between 100 m/s and 400 m/s, so as to reduce the average initial size of the crushed matter by a factor of 5 to 20.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: February 23, 2021
    Assignee: FREWITT FABRIQUE DE MACHINES SA
    Inventors: Glenn Corminboeuf, Antoine Virdis
  • Patent number: 9289776
    Abstract: A milling device for performing a milling operation comprising a milling unit comprising a housing defining a milling chamber that can be filled with a material to be milled, a rotor assembly rotatably mounted in the housing, and a screen assembly for fractionating the material milled by the rotor assembly in movement and extending below the rotor assembly; and a drive unit adapted for controlling the movements of the rotor assembly relative to the screen assembly during the milling operation; wherein said drive unit is configured to produce an oscillating movement of the rotor assembly, the oscillating movement having an oscillation angle that can be varied during the milling operation when controlling the movements of the rotor assembly relative to the screen assembly. The milling device has improved milling efficiency.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: March 22, 2016
    Assignee: FREWITT FABRIQUE DE MACHINES SA
    Inventors: Antoine Virdis, Xin Gao
  • Publication number: 20130119172
    Abstract: A milling device for performing a milling operation comprising a milling unit comprising a housing defining a milling chamber that can be filled with a material to be milled, a rotor assembly rotatably mounted in the housing, and a screen assembly for fractionating the material milled by the rotor assembly in movement and extending below the rotor assembly; and a drive unit adapted for controlling the movements of the rotor assembly relative to the screen assembly during the milling operation; wherein said drive unit is configured to produce an oscillating movement of the rotor assembly, the oscillating movement having an oscillation angle that can be varied during the milling operation when controlling the movements of the rotor assembly relative to the screen assembly. The milling device has improved milling efficiency.
    Type: Application
    Filed: January 8, 2013
    Publication date: May 16, 2013
    Applicant: Frewitt Fabrique de Machines SA
    Inventor: Frewitt Fabrique de Machines SA
  • Patent number: 8205817
    Abstract: A bead mill for performing wet comminuting including a stationary vessel having an internal wall and forming a milling chamber to be filled at least partly with milling bodies, raw particles and a carrying liquid to form a suspension within the milling chamber; an activator shaft, rotatable around an axis concentric with the stationary vessel and a rotating activator connected to the activator shaft, to comminute said raw particles to produce milled particles; characterized in that said bead mill further comprises a separator, containing a separator chamber disposed substantially vertically, a laminarization portion providing an upward laminar suspension flow within the separator chamber, to separate the milled particles from the milling beads and raw particles depending on the flow velocity of said upward laminar suspension flow.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: June 26, 2012
    Assignee: Frewitt Fabrique de Machines SA
    Inventors: Edward Brook-Levinson, Boris Petrov, Thierry Jomini
  • Publication number: 20110168814
    Abstract: A bead mill for performing wet comminuting comprising a stationary vessel having an internal wall and forming a milling chamber to be filled at least partly with milling bodies, raw particles and a carrying liquid to form a suspension within the milling chamber; an activator shaft, rotatable around an axis concentric with the stationary vessel and a rotating activator connected to the activator shaft, to comminute said raw particles to produce milled particles; characterized in that said bead mill further comprises a separator, containing a separator chamber disposed substantially vertically, a laminarization portion providing an upward laminar suspension flow within the separator chamber, to separate the milled particles from the milling beads and raw particles depending on the flow velocity of said upward laminar suspension flow.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 14, 2011
    Applicant: FREWITT FABRIQUE DE MACHINES SA
    Inventors: Edward Brook-Levinson, Boris Petrov, Thierry Jomini