Patents by Inventor David C. Lucas

David C. Lucas 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: 11938065
    Abstract: A surgical patient support includes a foundation frame, a support top, and a brake system. The foundation frame includes a first column and a second column. The support top is coupled to the first column and the second column for rotation about a top axis extending along the length of the support top. A single-handle unlock for the support top is also provided.
    Type: Grant
    Filed: April 6, 2021
    Date of Patent: March 26, 2024
    Assignee: Allen Medical Systems, Inc.
    Inventors: Joshua C. Hight, David P. Scott, Thomas K. Skripps, Orlando Soto, Darwin Keith-Lucas, Justin I. McCarthy, Jack B. Sing, Jeffrey C. Marrion, Phillip B. Dolliver, Joshua J. Moriarty
  • Publication number: 20220399173
    Abstract: A motor control center circuit breaker replacement kit includes a standoff having a first plurality of mounting holes corresponding to existing holes on a bucket of the motor control center and a second plurality of holes corresponding to existing holes on a circuit breaker, a door interface panel having a third plurality of holes corresponding to existing holes on a door of the motor control center, the door interface panel having an opening formed therein having a size and shape corresponding to a handle operator associated with the circuit breaker, and a safety latch having a slot structured to receive a tab of the handle operator.
    Type: Application
    Filed: November 6, 2020
    Publication date: December 15, 2022
    Applicant: Westinghouse Electric Company LLC
    Inventors: Adam E. TOKAR, David C. LUCAS, Walter J. DRZAL, Joshua J. YAKLICH
  • Patent number: 8430169
    Abstract: A method for managing hydrates in a subsea production system is provided. The production system includes a host production facility, a control umbilical, at least one subsea production well, and a single production line. The method generally comprises producing hydrocarbon fluids from the at least one subsea production well and through the production line, and then shutting in the production line. In addition, the method includes the steps of depressurizing the production line to substantially reduce a solution gas concentration in the produced hydrocarbon fluids, and then repressurizing the production line to urge any remaining gas in the free gas phase within the production line back into solution. The method also includes displacing production fluids within the production line by moving displacement fluids from a service line within the umbilical line and into the production line. The displacement fluids preferably comprise a hydrocarbon-based fluid having a low dosage hydrate inhibitor (LDHI).
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: April 30, 2013
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Richard F. Stoisits, David C. Lucas, Larry D. Talley, Donald P. Shatto, Jiyong Cai
  • Publication number: 20100193194
    Abstract: A method for managing hydrates in a subsea production system is provided. The production system includes a host production facility, a control umbilical, at least one subsea production well, and a single production line. The method generally comprises producing hydrocarbon fluids from the at least one subsea production well and through the production line, and then shutting in the production line. In addition, the method includes the steps of depressurizing the production line to substantially reduce a solution gas concentration in the produced hydrocarbon fluids, and then repressurizing the production line to urge any remaining gas in the free gas phase within the production line back into solution. The method also includes displacing production fluids within the production line by moving displacement fluids from a service line within the umbilical line and into the production line. The displacement fluids preferably comprise a hydrocarbon-based fluid having a low dosage hydrate inhibitor (LDHI).
    Type: Application
    Filed: August 21, 2008
    Publication date: August 5, 2010
    Inventors: Richard F. Stoisits, David C. Lucas, Larry D. Talley, Donald P. Shatto, Jiyong Cai
  • Patent number: 7721807
    Abstract: A method for managing hydrates in a subsea production system is provided. The system has at least one producing subsea well, a jumper for delivering produced fluids from the subsea well to a manifold, a production line for delivering produced fluids to a production gathering facility, and an umbilical for delivering chemicals to the manifold. The subsea well has been shut in, leaving produced fluids in a substantially uninhibited state. The method generally comprises the steps of pumping a displacement fluid into the chemical injection tubing, pumping the displacement fluid through a chemical injection tubing provided in the umbilical, further pumping the displacement fluid through the manifold and into the production line, and pumping the displacement fluid through the production line so as to displace the produced fluids before hydrate formation may begin. Preferably, a chemical inhibitor is placed in the chemical injection tubing before the displacement fluid is pumped into the chemical injection tubing.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: May 25, 2010
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Richard F. Stoisits, David C. Lucas, Jon K. Sonka
  • Patent number: 5874712
    Abstract: A flexible electric heater may be formed from multiple congruent planar layers secured to one another to form a laminate in a variety of configurations. A junction box is adhered to the planar layers over an opening in an outer layer. An adhesive catchment area in the laminate is filled with adhesive, and the adhesive extends into the junction box where it fills a second adhesive catchment area. The mass of continuous adhesive thus formed seals and bonds the junction box to the flexible planar layers. Conductors from the electrical heater pass through the adhesive and may be strain relieved.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: February 23, 1999
    Assignee: High-Q Design Ltd.
    Inventors: Peter R. Toth, David C. Lucas