Patents by Inventor Frank Rahnfeld

Frank Rahnfeld 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: 6966432
    Abstract: The drive mechanism (10) has a drive member (12) and a flexible conveying member (14). The engaging elements (12b) of the drive member (12) have an engaging element spacing (t1), while the associated counter elements (14b) of the conveyor member 14 have a counter element spacing (t2). According to the invention the engaging element spacing (t1) of the engaging elements (12b) is larger than the counter element spacing (t2) of the counter elements (14b) of the conveying member in order to compensate for conveyor member stretching in operation. In a preferred embodiment the conveying member is a flexible conveyor chain and the drive member (12) is a toothed drive wheel. In another preferred embodiment the ratio of the engaging element spacing (t1) of the drive member (12) to the counter element spacing (t2) of the conveying member (14) is between about 1.01 and about 1.10.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: November 22, 2005
    Assignee: Bosch Rexroth AG
    Inventors: Johannes Koban, Michael Neuber, Frank Rahnfeld
  • Publication number: 20040055855
    Abstract: The drive mechanism (10) has a drive member (12) and a flexible conveying member (14). The engaging elements (12b) of the drive member (12) have an engaging element spacing (t1), while the associated counter elements (14b) of the conveyor member 14 have a counter element spacing (t2). According to the invention the engaging element spacing (t1) of the engaging elements (12b) is larger than the counter element spacing (t2) of the counter elements (14b) of the conveying member in order to compensate for conveyor member stretching in operation. In a preferred embodiment the conveying member is a flexible conveyor chain and the drive member (12) is a toothed drive wheel. In another preferred embodiment the ratio of the engaging element spacing (t1) of the drive member (12) to the counter element spacing (t2) of the conveying member (14) is between about 1.01 and about 1.10.
    Type: Application
    Filed: July 17, 2003
    Publication date: March 25, 2004
    Inventors: Johannes Koban, Michael Neuber, Frank Rahnfeld
  • Patent number: 6431787
    Abstract: A device (10) for fastening components (11) has a mounting element (12), which rests each with a respective joining face (16) on the components (11) to be connected, and which is covered with a cap (14). The cap (14) has extensions (38), which positively engage recesses (30) embodied on the mounting element (12). This assures a secure hold of the cap (14) even after a relatively long time.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: August 13, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Torsten Buennig, Frank Rahnfeld
  • Patent number: 6398448
    Abstract: A mounting element (12, 12a, 12b) for securing components, in particular profile bars, and a cap (14, 14a, 14b) for covering the mounting element (12, 12a, 12b) are provided. Indentations (31, 39) are provided in lateral ribs (22, 36) of the mounting element (12, 12a, 12b) and/or of the cap (14, 14a, 14b). This makes the grip better and/or facilitates aligning the mounting element (12, 12a, 12b) and/or the cap (14, 14a, 14b).
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: June 4, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Benz, Joerg Walther, Torsten Buenning, Frank Rahnfeld, Olaf Kelmd
  • Patent number: D443504
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: June 12, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Benz, Joerg Walther, Torsten Buenning, Frank Rahnfeld, Olaf Klemd
  • Patent number: D427894
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: July 11, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Benz, Joerg Walther, Torsten Buenning, Frank Rahnfeld, Olaf Klemd
  • Patent number: D428804
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: August 1, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Albrecht Benz, Joerg Walther, Torsten Buenning, Frank Rahnfeld, Olaf Klemd