Patents by Inventor Guenther W. Klemm

Guenther W. Klemm 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: 5205366
    Abstract: The device comprises a solid drill bit (28) and an annular drill bit (40). Axial impacts are exerted on the solid drill bit (28) which are transmitted onto the annular drill bit (40) through impact transmission surfaces. The annular drill bit (40) is freely axially displaceable within limits. It has rearwardly projecting tongues (43) that engage windows (15) of an outer pipe end piece (12). Thus, the movability of the annular drill bit (40) is ensured without any keyings or the like being necessary, which entail the risk of a clogging with bore material. All movable parts are included in the scavenging so that jamming is avoided.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: April 27, 1993
    Assignee: Ing. Guenter Klemm Bohrtechnik GmbH
    Inventor: Guenther W. Klemm