Patents by Inventor Ralf Limmer

Ralf Limmer 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).

  • Cleaning device for the cleaning of a spin rotor and scraper element
    Patent number: 6910326
    Abstract: The invention concerns a cleaning apparatus for the cleaning of a spin rotor of a spinning station leaning head which can be insertably presented to the spin rotor and on which cleaning head are placed at least two scraper elements. In accord with the invention, the at least two scraper elements are pneumatically extendable, wherein the position of the two scraper elements are so secured on the outer circumference of the cleaning head, that the sum of the contact forces which are exerted from the scraper element in the radial direction onto the rotor is zero, or practically zero.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: June 28, 2005
    Assignee: Rieter Ingolstadt Spinnereimaschinenenbau AG
    Inventors: Adalbert Stephan, Ralf Limmer, Gerd Stahlecker
  • Cleaning device for a rotor spinning unit
    Patent number: 6748732
    Abstract: The present invention relates to a cleaning device of a rotor spinning unit with at least one cleaning head and an extensible device to extend and retract the cleaning head. The cleaning head is replaceable and connected to the extensible device.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: June 15, 2004
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Ralf Limmer
  • Cleaning device for the cleaning of a spin rotor and scraper element
    Publication number: 20040079068
    Abstract: The invention concerns a cleaning apparatus for the cleaning of a spin rotor of a spinning station with a cleaning head which can be insertably presented to the spin rotor and on which cleaning head are placed at least two scraper elements. In accord with the invention, the at least two scraper elements are pneumatically extendable, wherein the position of the at least two scraper elements are so secured on the outer circumference of the cleaning head, that the sum of the contact forces which are exerted from the scraper element in a radial direction onto the rotor is zero, or practically zero.
    Type: Application
    Filed: March 11, 2003
    Publication date: April 29, 2004
    Inventors: Adalbert Stephan, Ralf Limmer, Gerd Stahlecker
  • Cleaning device for a rotor spinning unit
    Publication number: 20030177750
    Abstract: The present invention relates to a cleaning device (1) of a rotor spinning unit with a cleaning head (63) and an extensible device (12, 31) to extend and retract at least the cleaning head (63). According to the invention, the cleaning head (63) is replaceable and connected to the extensible device (12, 31).
    Type: Application
    Filed: January 7, 2003
    Publication date: September 25, 2003
    Applicant: RIETER INGOLSTADT SPINNEREIMASCHINENBAU AG
    Inventor: Ralf Limmer