Patents by Inventor Carl-Henry rndal

Carl-Henry rndal 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).

  • Single-needle circuit for circulating blood outside the body in blood treatment apparatus
    Patent number: 5227049
    Abstract: A blood treatment apparatus having a circuit for circulating blood outside the body and designed to be connected to a patient via a single needle, including a blood treatment device such as a heamodialyzer, pumps for causing blood to flow through the circuit, a first blood expansion chamber located in the circuit upstream of the blood treatment device for temporarily storing a volume of blood to be treated, a second blood expansion chamber located downstream of the blood treatment device for temporarily storing a volume of treated blood, first and second pressure regulators, connected to the first and second blood expansion chambers, for adjusting pressure in the blood expansion chambers, and a controller for interacting with the regulators to maintain a substantially constant pressure in each of the first and second chambers during a treatment session.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: July 13, 1993
    Assignee: Hospal Industrie
    Inventors: Jacques Chevallet, Jean-Claude Riquier, Carl-Henry rndal, Allan Petersen