Patents by Inventor Stefan Kemper

Stefan Kemper 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).

  • Link chain, in particular bush chain
    Patent number: 11118656
    Abstract: A link chain, in particular bush chain, comprising an inner link plate with a bush, an outer link plate with a pin, wherein the pin and bush form a chain joint, wherein a sealing arrangement is provided for sealing the chain joint, wherein the sealing arrangement is arranged between the inner link plate and the outer link plate, and wherein the sealing arrangement comprises a seal and a seal-accommodating space, characterized in that in that the seal-accommodating space is formed from a thrust washer and an annular cutout, in particular in the outer link plate, wherein a ring, which is designed in the form of a metal ring, is arranged in the seal-accommodating space, or in that the seal-accommodating space is formed from a thrust washer and an accommodating washer.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: September 14, 2021
    Assignee: Ketten Wulf Betriebs GmbH
    Inventors: Thomas Hebbecker, Christian Hanemann, Frank Padberg, Stefan Kemper
  • LINK CHAIN, IN PARTICULAR BUSH CHAIN
    Publication number: 20180328450
    Abstract: A link chain, in particular bush chain, comprising an inner link plate with a bush, an outer link plate with a pin, wherein the pin and bush form a chain joint, wherein a sealing arrangement is provided for sealing the chain joint, wherein the sealing arrangement is arranged between the inner link plate and the outer link plate, and wherein the sealing arrangement comprises a seal and a seal-accommodating space, characterized in that in that the seal-accommodating space is formed from a thrust washer and an annular cutout, in particular in the outer link plate, wherein a ring, which is designed in the form of a metal ring, is arranged in the seal-accommodating space, or in that the seal-accommodating space is formed from a thrust washer and an accommodating washer.
    Type: Application
    Filed: November 24, 2016
    Publication date: November 15, 2018
    Applicant: Ketten-Wulf Betriebs-GmbH
    Inventors: Thomas Hebbecker, Christian Hanemann, Frank Padberg, Stefan Kemper
  • Computer security with local and remote authentication
    Patent number: 7222361
    Abstract: A secure computer system including a client having a client database for locally-authenticating a user; and a server, in communication with the client, having a server database for remotely-authenticating the user in response to a request from the client. The system also provides updating of the client database according to results of the local and remote authentication.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: May 22, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Stefan Kemper
  • Computer security with local and remote authentication
    Publication number: 20030093690
    Abstract: A secure computer system including a client having a client database for locally-authenticating a user; and a server, in communication with the client, having a server database for remotely-authenticating the user in response to a request from the client. The system also provides updating of the client database according to results of the local and remote authentication.
    Type: Application
    Filed: November 15, 2001
    Publication date: May 15, 2003
    Inventor: Stefan Kemper