Patents by Inventor Sijmen Sipma

Sijmen Sipma 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: 7841271
    Abstract: A cheese vat for at least preparing curd for soft fresh cheese, comprising at least one cutting frame provided with a cutting wire system, which has a frame which has at least two opposite frame parts between which cutting wire sections extend, which frame parts are provided with openings form receiving a cutting wire, wherein the ends of a cutting wire are each fastened via pull relief means.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: November 30, 2010
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Wieger van der Meulen
  • Patent number: 7544917
    Abstract: A curd preparation vat provided with a sealing construction for a shaft passing through a wall of the vat, which sealing construction has at least one receiving space and a sealing ring included therein in operation, surrounding the shaft, wherein the sealing ring has an annular body which is provided with a sealing lip which cooperates with a radially extending surface of the sealing construction, and wherein the annular body furthermore has an axially inner surface abutting against first positioning means of the sealing construction, wherein the sealing lip of the at least one sealing ring extends both radially and axially obliquely outwards from a both radially and axially outer edge area of the annular body, and wherein between the sealing lip and the inner surface of the annular body that abuts against the shaft, an axially outer surface of the annular body is situated, which cooperates directly with second positioning means, which leave the lip clear, for fixing the at least one sealing ring between the
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: June 9, 2009
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Wieger van der Meulen, Sebastiaan Jozef Clemens Buijs
  • Publication number: 20080047442
    Abstract: A cheese vat for at least preparing curd for soft fresh cheese, comprising at least one cutting frame provided with a cutting wire system, which has a frame which has at least two opposite frame parts between which cutting wire sections extend, which frame parts are provided with openings form receiving a cutting wire, wherein the ends of a cutting wire are each fastened via pull relief means.
    Type: Application
    Filed: September 20, 2007
    Publication date: February 28, 2008
    Inventors: Sijmen Sipma, Wieger van der Maulen
  • Patent number: 7305917
    Abstract: A cheese vat for at least preparing curd for soft fresh cheese, comprising at least one cutting frame provided with a cutting wire system, which has a frame which has at least two opposite frame parts between which cutting wire sections extend, which frame parts are provided with openings form receiving a cutting wire, wherein the ends of a cutting wire are each fastened via pull relief means.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: December 11, 2007
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Sijmen Sipma, Wieger van der Meulen
  • Publication number: 20060021518
    Abstract: A curd preparation vat provided with a sealing construction for a shaft passing through a wall of the vat, which sealing construction has at least one receiving space and a sealing ring included therein in operation, surrounding the shaft, wherein the sealing ring has an annular body which is provided with a sealing lip which cooperates with a radially extending surface of the sealing construction, and wherein the annular body furthermore has an axially inner surface abutting against first positioning means of the sealing construction, wherein the sealing lip of the at least one sealing ring extends both radially and axially obliquely outwards from a both radially and axially outer edge area of the annular body, and wherein between the sealing lip and the inner surface of the annular body that abuts against the shaft, an axially outer surface of the annular body is situated, which cooperates directly with second positioning means, which leave the lip clear, for fixing the at least one sealing ring between the
    Type: Application
    Filed: July 29, 2005
    Publication date: February 2, 2006
    Inventors: Sijmen Sipma, Wieger van der Meulen, Sebastiaan Jozef Buijs
  • Publication number: 20040168582
    Abstract: A cheese vat for at least preparing curd for soft fresh cheese, comprising at least one cutting frame provided with a cutting wire system, which has a frame which has at least two opposite frame parts between which cutting wire sections extend, which frame parts are provided with openings form receiving a cutting wire, wherein the ends of a cutting wire are each fastened via pull relief means.
    Type: Application
    Filed: December 8, 2003
    Publication date: September 2, 2004
    Inventors: Sijmen Sipma, Wieger van der Meulen
  • 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