Patents by Inventor Hartmut Hulshoff

Hartmut Hulshoff 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: 6354233
    Abstract: A sewing or embroidery machine, comprising a needle, a gripper and a workpiece advancing device with at least one driven advancing element. Said advancing device has a linear drive for driving the advancing element. The linear drive has two armatures which can be driven in different directions. A control device with a control circuit for the horizontal movements and a control circuit for the vertical movements of the advancing element is allocated to the advancing device and both control circuits are subordinate to a main control device comprising a data processing device. Said main control device receives synchronization impulses from an encoder according to the current position of the needle or the gripper. The actual values of the horizontal and/or vertical movements of the advancing element can be supplied to the main control device at option.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: March 12, 2002
    Assignee: G.M. Pfaff Aktiengesellschaft In Insolvenz
    Inventor: Hartmut Hulshoff
  • Patent number: 4899287
    Abstract: Processor arrangement for sewing apparatus for the operational control of at least one sewing device, including accessories, and for regulating the rotational speed of a positioning drive mechanism which drives the sewing device. The operating control characteristics as well as the rotational speed control characteristics are predeterminable and modifiable by digital programming signals of a programmer.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: February 6, 1990
    Assignee: Quick-Rotan Elektromotoren GmbH
    Inventors: Hartmut Hulshoff, Peter Kothe, Michael Luft, Ulrich Schutz