Patents by Inventor Ernst Ettema

Ernst Ettema 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).

  • Trellis stake and wire support to be used in connection with such a trellis stake
    Patent number: 4642940
    Abstract: The invention relates to a plastic trellis stake for supporting rows of tensioned wires 12, more particularly for supporting grape vines in vineyards, a wire support to be used in connection with this trellis stake, said stake having been provided with ribs 1a, 1b forming protuberances.A clamp 6, 7 of the wire support 5 comprises a part 6, forming seats for the protuberances of ribs 1a, 1b of the stake, and another part 7 being provided with hooks 11 for wires 12 and enclosing free ends 8 of that part 6 of the clamp.The trellis stake and the wire support are destined for supporting tendrils and twigs of plants, more particularly, grape vines in vineyards.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: February 17, 1987
    Assignees: Wavin B.V., Somevena B.V.
    Inventors: Ernst Ettema, Jan de Vries
  • Plastic crate or tray with slide wall injection molding points
    Patent number: 4450132
    Abstract: A plastic crate or tray comprises a bottom and vertical side walls. A side wall comprises inner and outer side wall parts.Injection molding points are present in the lower edge of the outer side wall parts.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: May 22, 1984
    Assignee: Wavin B.V.
    Inventors: Ernst Ettema, Coenraad J. B. M. Benraad, Klaas Roskam
  • Crates
    Patent number: 4308966
    Abstract: A crate 1 for bottles with cylindrical body portions has double-skinned corner portions 7 which define with portions 13 of an internal partitioning grid 5 corner compartments 6a for bottles. The inner skin 12 of the corner portion is formed with vertical ribs 14 adjacent the grid portions 13. These ribs, which are interconnected with the outer skin 8 of the corner portion to form hollow columns 14a therewith, strength the corner portions and allow the spacing of the skins thereof to be reduced so that the size of the compartment can be increased for given external crate dimensions, and as the ribs are located adjacent the partitioning portions 13 they occupy space which would otherwise be free and do not reduce the effective size of the corner compartments.
    Type: Grant
    Filed: March 5, 1980
    Date of Patent: January 5, 1982
    Assignee: Wavin B.V.
    Inventors: Ernst Ettema, Coenraad J. B. Benraad
  • Plastic tray for fruit or like products
    Patent number: 4225046
    Abstract: A tray for packaging fruit comprising a base and converging side walls, is provided with a wide rim at its upper side, said rim being integral with a suspending ledge, while a support can be pushed through an opening in the rim at the corners of the tray and a staggered part of the support fits the ledge, the support also being fixed by cams at the base of the tray.
    Type: Grant
    Filed: November 15, 1978
    Date of Patent: September 30, 1980
    Assignee: Wavin B.V.
    Inventor: Ernst Ettema
  • Branch piece for providing branch connections in a pipe
    Patent number: 4108480
    Abstract: A branch piece for pipe branch connections comprising two parts. The first part is provided with two longitudinal edges extending parallel to the axis of the branch pipe, and the other part is provided with one longitudinal edge which can be coupled with one of the longitudinal edges of the first part. The second longitudinal edge of the other part tapered. A separate wedgelike connecting member has two lips each adapted to engage with a longitudinal edge of the first part and of the second part.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: August 22, 1978
    Assignee: Wavin B.V.
    Inventor: Ernst Ettema