Patents by Inventor Karl-Axel Hook

Karl-Axel Hook 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).

  • Automatic two-chamber injector
    Patent number: 4983164
    Abstract: The invention relates to an automatic two-chamber injector for mixing and injecting a medical solution. The injector comprises a barrel (11) having a first end with a receiving portion (15) for an injection needle (17), said portion being sealed prior to use, and a second end with a displaceable plunger (27). The barrel (11) comprises two chambers (29, 30) separated by a migrationproof membrane (28), said membrane (28) being adapted to rupture when the plunger (27) is displaced towards the first end of the barrel (11).The invention also related to a method for mixing and injecting a solution by means of an automatic two-chamber injector and to a cartridge for a two-chamber injector.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: January 8, 1991
    Assignee: Astra Meditec AB
    Inventors: Karl-Axel Hook, Nils B. Nilson, Kjell I. Wellenstam