Patents by Inventor Preben Hoffmeyer

Preben Hoffmeyer 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).

  • Method and apparatus for measuring the strength of a fibrous body
    Patent number: 4182163
    Abstract: The strength of a material is measured by positioning a tool against a surface of the material and driving an elongated piercing plug having a blunt front end into the material. The penetration depth of the piercing plug is proportional to the material strength. A trigger on the tool for releasing the piercing plug for driving movement into the material requires manual force acting through the trigger on the tool in a direction for maintaining the front end portion of the tool in engagement with the surface of the material being tested.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: January 8, 1980
    Assignee: Wood-Slimp GmbH
    Inventor: Preben Hoffmeyer