Patents by Inventor Sjoerd Huitema

Sjoerd Huitema 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: 6539845
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft comprises a number of cutting frames extending radially from the shaft and having a number of strip-shaped transverse knives and longitudinal knives, the longitudinal knives each having an inner end situated near the shaft and an outer end situated near the wall of the curd vat, while at least a number of longitudinal knives of at least one of the cutting frames are provided, at the outer end situated near the wall of the curd vat, with a knife end section which has at least one portion extending transversely to the longitudinal direction of the longitudinal knives.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: April 1, 2003
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Publication number: 20020096057
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft comprises a number of cutting frames extending radially from the shaft and having a number of strip-shaped transverse knives and longitudinal knives, the longitudinal knives each having an inner end situated near the shaft and an outer end situated near the wall of the curd vat, while at least a number of longitudinal knives of at least one of the cutting frames are provided, at the outer end situated near the wall of the curd vat, with a knife end section which has at least one portion extending transversely to the longitudinal direction of the longitudinal knives.
    Type: Application
    Filed: March 29, 2002
    Publication date: July 25, 2002
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Patent number: 6418836
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft comprises a number of cutting frames extending radially from the shaft and having a number of strip-shaped transverse knives and longitudinal knives, the longitudinal knives each having an inner end situated near the shaft and an outer end situated near the wall of the curd vat, while at least a number of longitudinal knives of at least one of the cutting frames are provided, at the outer end situated near the wall of the curd vat, with a knife end section which has at least one portion extending transversely to the longitudinal direction of the longitudinal knives.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: July 16, 2002
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Patent number: 6367375
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft carries a number of cutting frames extending radially from the shaft and arranged on the shaft in staggered relation, each cutting frame having two frame girders, which extend radially from the drivable shaft and between which a lattice work is situated formed from longitudinal knives and transverse knives, the transverse knives being mounted on the frame girders by welding. The transverse knives form openings which are in line, in which the longitudinal knives are received with ample play, while means are provided for substantially preventing displacement of the longitudinal knives in the longitudinal direction.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: April 9, 2002
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Publication number: 20020003181
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft comprises a number of cutting frames extending radially from the shaft and having a number of strip-shaped transverse knives and longitudinal knives, the longitudinal knives each having an inner end situated near the shaft and an outer end situated near the wall of the curd vat, while at least a number of longitudinal knives of at least one of the cutting frames are provided, at the outer end situated near the wall of the curd vat, with a knife end section which has at least one portion extending transversely to the longitudinal direction of the longitudinal knives.
    Type: Application
    Filed: April 25, 2001
    Publication date: January 10, 2002
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Publication number: 20010022141
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft carries a number of cutting frames extending radially from the shaft and arranged on the shaft in staggered relation, each cutting frame having two frame girders, which extend radially from the drivable shaft and between which a lattice work is situated formed from longitudinal knives and transverse knives, the transverse knives being mounted on the frame girders by welding. The transverse knives form openings which are in line, in which the longitudinal knives are received with ample play, while means are provided for substantially preventing displacement of the longitudinal knives in the longitudinal direction.
    Type: Application
    Filed: May 25, 2001
    Publication date: September 20, 2001
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Patent number: 6257129
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft carries a number of cutting frames extending radially from the shaft and arranged on the shaft in staggered relation, each cutting frame having two frame girders, which extend radially from the drivable shaft and between which a lattice work is situated formed from longitudinal knives and transverse knives, the transverse knives being mounted on the frame girders by welding. The transverse knives form openings which are in line, in which the longitudinal knives are received with ample play, while a device are provided for substantially preventing displacement of the longitudinal knives in the longitudinal direction.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: July 10, 2001
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Sjoerd Huitema
  • Patent number: RE42938
    Abstract: Apparatus for cutting and stirring curd, comprising a curd vat with a shaft drivable for rotation, which shaft carries a number of cutting frames extending radially from the shaft and arranged on the shaft in staggered relation, each cutting frame having two frame girders, which extend radially from the drivable shaft and between which a lattice work is situated formed from longitudinal knives and transverse knives, the transverse knives being mounted on the frame girders by welding. The transverse knives form openings which are in line, in which the longitudinal knives are received with ample play, while means are provided for substantially preventing displacement of the longitudinal knives in the longitudinal direction.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: November 22, 2011
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Sjoerd Huitema