Patents by Inventor Christian Hefner

Christian Hefner 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: 9039954
    Abstract: An injection tool for the production of components by an injection-molding method, the injection tool including several cavities for shaping one respective product, an injection nozzle for injecting plastic materials for each cavity, and an actuating device. The injection nozzle has an injection channel which can be closed by a nozzle needle in order to control the injection process. The actuating device is arranged to move the nozzle needle in an axial direction between a first end position and a second end position, with an adjustable stop being provided which defines the first end position.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: May 26, 2015
    Inventor: Christian Hefner
  • Publication number: 20130175735
    Abstract: An injection tool for the production of components by an injection-molding method, the injection tool including several cavities for shaping one respective product, an injection nozzle for injecting plastic materials for each cavity, and an actuating device. The injection nozzle has an injection channel which can be closed by a nozzle needle in order to control the injection process. The actuating device is arranged to move the nozzle needle in an axial direction between a first end position and a second end position, with an adjustable stop being provided which defines the first end position.
    Type: Application
    Filed: June 27, 2011
    Publication date: July 11, 2013
    Inventor: Christian Hefner
  • Publication number: 20030091684
    Abstract: Injection nozzle (8) for polymers which are not crosslinked, but which can be crosslinked, especially gum elastic, rubber and polysiloxanes discharges with its nozzle tip (15) in the area of the mold cavity (6) at the entry hole (18) which is located in the mold plate (2) and which discharges into a mold cavity (6). In the nozzle (8) there is a nozzle needle (40) which can be moved axially by a linear motor (50) and which can be moved out of the closed position which seals the hole (16) in the nozzle tip (15) and into the open position in which the end of the needle (40) is located at a distance from the tip hole (10) in the nozzle tip (15). The injection nozzle (8) is cooled via a temperature control jacket (13, 14) through which a temperature control liquid flows. In the closed position the end surface (73) of the nozzle needle (40) is flush with the surface (74) of the mold cavity (6) in which the entry hole (18) is located.
    Type: Application
    Filed: April 11, 2002
    Publication date: May 15, 2003
    Applicant: HEFNER ELASTOMERE-TECHNIK GMBH
    Inventor: Christian Hefner
  • Patent number: 6394786
    Abstract: The mold includes two die plates at least one backing plate held between the two die plates, and border at least one mold cavity, and a device for opening the mold and lifting the backing plate from the die plates. One die plate can be moved in one plane at right angles to the direction of motion of the backing plate and on this die plate there are ejectors for the injection moldings. The ejectors are offset laterally to the mold cavities in the backing plate, i.e. the ejectors in the closed state of the mold lie next to the mold cavities.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: May 28, 2002
    Assignee: Hefner Elastomere Verarbeitung GmbH
    Inventor: Christian Hefner