Patents by Inventor Daniel Edward Ruhland

Daniel Edward Ruhland 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).

  • Medical device for introduction of a fluid into the blood circulation system of a patient and method for controlling leakage currents in a medical device provided or combined with a warming unit
    Patent number: 11957890
    Abstract: A warming unit (21) coupled or configured to be coupled to a heated portion (19) of a fluid circuit (6, 7, 10, 11, 13, 14, 15; 107) of a medical device (1, 100). The warming unit (21) comprises a leakage current reduction circuit (35) configured to perform the following procedure: connecting a heat transfer element (22) of the warming unit (21) to a ground connection (33) through a resistance element (34), which keeps a normal condition patient leakage current below a first limit value, and disconnecting the heat transfer element (22) from the ground connection (33) if a current indicating that a patient is connected to a mains voltage is sensed through the resistance element (34), in order to keep a fault condition patient leakage current below a second limit value.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: April 16, 2024
    Assignee: Gambro Lundia AB
    Inventors: Michael Jon Wangen, Daniel Edward Ruhland, Randy A. Miller