Patents by Inventor Thomas W. Andrews

Thomas W. Andrews 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).

  • Publication number: 20190170706
    Abstract: A method for injecting a diluted sample in a chromatography system includes merging a flow of a sample and a flow of a diluent to form a flow of a diluted sample. A dilution ratio of the diluted sample equals a sum of the volumetric flow rates of the sample and the diluent divided by the volumetric flow rate of the sample. The diluted sample is stored in a holding element before injection into a chromatographic system flow. Sample dilution occurs under low pressure relative to the chromatographic flow thereby allowing lower pressure sample and diluent syringes to be used. Other benefits include reduced compressibility and a reduction in leaks due to the lower pressure operation. The method avoids problems associated with manual techniques which can introduce errors due, for example, to loss of sample, sample precipitation and adsorption of sample to vials.
    Type: Application
    Filed: May 4, 2017
    Publication date: June 6, 2019
    Inventors: Martin Gilar, Richard W. Andrews, Peyton C. Beals, Thomas McDonald, Keith Fadgen, Jordan Kornfeld, Geoff Gerhardt, Sylvain Cormier
  • Patent number: 6186977
    Abstract: An apparatus for total intravenous anesthesia includes at least one supply and infusion pump for an intravenous anesthesia agent carried by the apparatus housing, and at least one monitor for monitoring the characteristics of the patient during the total intravenous anesthesia. The at least one intravenous anesthesia agent preferably includes a first intravenous anesthesia agent, and more preferably, an analgesic, having a relatively quick offset so that the effects wears off relatively quickly upon stopping intravenous infusion. For monitoring the patient, the apparatus preferably includes at least one of an electrocardiogram, a blood oxygen monitor, a blood carbon dioxide monitor, inspiration/expiration oxygen, inspiration/expiration carbon dioxide, a blood pressure monitor, a pulse rate monitor, a respiration rate monitor, and a patient temperature monitor, for example. The first intravenous anesthesia agent may be an esterase metabolized opioid, such as remifentanil.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: February 13, 2001
    Assignee: Joseph L. Riley Anesthesia Associates
    Inventors: Thomas W. Andrews, Louis M. Guzzi, David P. Hartson, James L. Riley
  • Patent number: 4378813
    Abstract: An apparatus is described for moving a probe (12) that engages moving living tissue such as a heart or an artery that is penetrated by the probe, which moves the probe in synchronism with the tissue to maintain the probe at a constant location with respect to the tissue. The apparatus includes a servo positioner (18) which moves a servo member (20) to maintain a constant distance from a sensed object (30) while applying very little force to the sensed object, and a follower (26) having a stirrup (28) at one end resting on a surface of the living tissue and another end carrying a sensed object (30) adjacent to the servo member. A probe holder (34) has one end mounted on the servo member (20) and another end which holds the probe (12). The probe is held adjacent to the stirrup (28) of the follower assembly, so that movements of the tissue and therefore of the follower assembly (26) result in corresponding movement of the probe (12) to follow the surface of the tissue.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: April 5, 1983
    Inventors: Alan M. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Lovelace, Cyril Feldstein, Thomas W. Andrews, Donald W. Crawford, Mark A. Cole