Patents by Inventor Jens Gronbaek

Jens Gronbaek 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).

  • Moulding tool and method of making same
    Patent number: 5019114
    Abstract: The moulding tool has an annular die providing a moulding cavity, an inner ring abutting against the die outer peripheral surface and an outer ring abutting against the inner ring outer peripheral surface. The inner ring is made of a material having a higher modulus of elasticity than the material from which the outer ring and die are made. Advantageously the inner ring is made of a carbide metal and the die and outer ring of steel and in the above described relationship to reduce the danger of fracture of the die.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: May 28, 1991
    Assignee: Danfoss A/S
    Inventor: Jens Gronbaek