Patents by Inventor Detlef Westphal

Detlef Westphal 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: 5769087
    Abstract: A body fluid measurement apparatus for continually monitoring the body fluids produced by a catheterized patient is disclosed. The apparatus comprises a discharge hose in fluid communication with the patient, a housing that supports the discharge hose, a dripping chamber for temporarily holding the body fluid while temperature and electrical conductivity measurements are made, a force transducer for producing a signal representing the weight of the body fluid mass collected, a container for collecting the body fluid that is suspended from the force transducer, a storage cell power source, and a computer for processing a signal generated by the force transducer, for generating a timing signal, and for computing the patient's body fluid volume flow in a certain time interval. All computed measurements are sent to a display also located on the apparatus.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: June 23, 1998
    Assignee: Fresenius AG
    Inventors: Detlef Westphal, Klaus Metzner, Gunther Grimm, Uwe Lapp, Andreas Wild, Franz-Wilhelm Koerdt
  • Patent number: 4835477
    Abstract: There is described a method and apparatus for the determination of hematocrit levels in which both the conductivity of whole blood and the conductivity of blood plasma are determined together. While a conductivity cell (18) is being used for the determination of the conductivity of whole blood, the conductivity of plasma is calculated in a computer (30) with the aid of ion selective electrodes (14, 16) from the sodium or potassium concentrations.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: May 30, 1989
    Assignee: Fresenius AG
    Inventors: Hans-Dietrich Polaschegg, Detlef Westphal, Klaus Metzner
  • Patent number: 4797191
    Abstract: Measuring device for determination of the activity or of the concentration of ions in solutions, which has an electrode block having several electrodes and with a flow channel, the flow channel being in connection at its one end with a sample vessel and is connected at its other end to a line, in which a pump is interposed, with calibrating solution containers.Between the pump and the outlet of the electrode block branches off a discharge line, in which a further pump is interposed. Preferably, both pumps are combined into a peristaltic pump, the lines being laid in the segments of the pump.According to a second embodiment, the electrode block is again in connection with the calibrating solution containers. The delivery of the sample is performed however on the same side through a septum. Advantageously, the other side of the electrode block opens out into a pressure equalization vessel, into which a withdrawal line opens in which in turn the above mentioned peristaltic pump is interposed.
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: January 10, 1989
    Assignee: Fresenius AG
    Inventors: Klaus Metzner, Detlef Westphal, Wolfgang Allendorfer, Reinhard Hahnel, Hans-Dietrich Polaschegg
  • Patent number: 4662208
    Abstract: An apparatus (1) for the drawing off of untreated and treated dialyzing liquid and/or blood from a dialysis device (1) has a dialyzer, from which a first line (22) goes off upstream and a second line (24) goes off downstream, which join into a third line (54). The third line (54) is connected to an analysis device (57). In each of the first and second lines is provided a pump (26, 28) and a shut-off element (56, 56'), between which an overflow (38, 40) per line is arranged. This on the one hand ensures that the liquid in the lines (22, 24) are kept constantly in motion, which prevents the formation of line blockages in the case of liquids tending to coagulate, and on the other hand considerably reduces the displacement time of the liquid to be investigated to the analysis device (57).
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: May 5, 1987
    Assignee: Fresenius AG
    Inventors: Klaus Metzner, Detlef Westphal, Wolfgang Allendorfer, Reinhard Hahnel, Hans-Dietrich Polaschegg