Patents by Inventor Jens Planert

Jens Planert 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).

  • Device for removing crowns, bridges, and similar structures from the stumps of teeth
    Patent number: 4725233
    Abstract: A device for removing crowns, bridges, or similar structures from the stumps (5) of teeth by breaking up the cement that secures them and having an extraction frame (3) with two mutually opposed jaws (4) that engage the vicinity of the crown (6), bridge, or other structure. A mechanism (1) for applying and extracting force to the extraction frame in a direction opposite the direction (6) of insertion is provided. The mechanism (1) has a massive movable projectile (17) guided along a path that at least terminates contrary to the direction (16) of insertion and subject to a source of power that can be released. An anvil (28) is positioned at the end of the path and secured to the extraction frame (3) and to the jaws (4). The jaws (4) are designed to engage the surface (10) of the crown (6), bridge, or other structure.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: February 16, 1988
    Inventor: Jens Planert