Patents by Inventor William H. Marshall

William H. Marshall 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: 6158455
    Abstract: A cap assembly for providing continuous drip to a faucet exposed to freezing temperatures such as a faucet located outside a house. The cap assembly includes a cap member adapted to be mounted over the end of a faucet, which cap member includes a cylindrical wall portion and a closed end portion having an opening therein. The cap assembly includes an internal annular ridge which is adapted to receive a flow disc within the ridge, which flow disc includes an opening which is non-aligned with the opening in the closed end portion of the cap in order to create a dripping action. A rubber washer is positioned in sealing engagement with the internal annular ridge and the flow disc. A filter member is located within the rubber washer such that, upon mounting of the cap assembly over the end portion of a faucet, a continuous dripping flow through the cap assembly may be provided in order to prevent water within the faucet or within piping leading to the faucet from freezing.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: December 12, 2000
    Inventors: William H. Marshall, Robert E. Williams
  • Patent number: 5658277
    Abstract: Apparatus for electrically, detachably attaching a monitor such as a glove monitor between a health care worker and a patient utilizing a particular magnetic, electrical connection so that the health care worker can easily connect and disconnect from electrical connection to the patient for movement about the room or elsewhere.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: August 19, 1997
    Assignee: Novatec Medical Products, Inc.
    Inventors: William H. Marshall, Robert E. Williams, John K. Bennett
  • Patent number: 5389097
    Abstract: A monitoring device for detecting adulteration of an article used in critical use applications such as a surgical glove where the gloves are worn by the surgeon and are exposed to the body fluids of a patient. The device includes the detection of a particular value of electrical condition, preferably resistance or impedance, as well as the first and second derivatives of electrical condition. These values are monitored in a substantially continuous manner and are smoothed and filtered to determine when a hole or thin spot in the glove occurs. In addition, the device includes an autoranging function which maintains the measured voltage in a prescribed range, thus allowing the device to operate at a higher level of accuracy for a greater period of time than a device without the feature. Also, the device warns the health care professional when the electrical properties of the gloves have degraded to a point where the device may no longer reliably detect holes in the gloves.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: February 14, 1995
    Assignee: Novatec Medical Products, Inc.
    Inventors: John K. Bennett, Mark Maxham, William H. Marshall, Robert E. Williams
  • Patent number: 5114425
    Abstract: An apparatus and method for detecting adulteration or a condition of near-adulteration of a glove used in critical use application such as in surgery where the gloves are worn by the surgeon and are exposed to the body fluids of a patient. The apparatus and method includes the detection not only of a particular level of conductivity which may be caused by a hole or thin spot in the glove but also the detection of a sudden change in conductivity which may be caused by a sudden change in the condition of the glove, such as the opening of a hole or a sudden thinning of the glove. In this manner, the apparatus and method provides detection not only for an actual condition of the glove but also for a change in condition of the glove. In addition, the circuit is a low impedance circuit, which automatically and continuously discharge static charge build-up on the surgeon.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: May 19, 1992
    Assignee: Novatec Medical Products, Inc.
    Inventors: Robert E. Williams, William H. Marshall, Robert B. Stout, John J. McCourt, Jr.
  • Patent number: 4865382
    Abstract: A surgeon's operating stool 10 is provided which is readily movable when not occupied by a person but resists undesirable movement once a person has occupied the stool 10. The stool is provided with a series of rollers 20 which normally support the stool 10 and allow for movement in any desired direction. However, the rollers 20 include a spring loaded collapsible mechanism which, when occupied by a person, forces the rollers 20 to retract into the base 12 of the stool 10 and causes a nonskin surface 38 to engage the floor. The base 12 of the stool 10 is configured to receive the feet of a person using the stool, such that a person using the stool in either a standing or sitting position forces the retracting mechanism to remain retracted and thereby prevent undesirable movement during use. The stool 10 also includes a hydraulic height adjusting mechanism which is readily adjustable via foot operation.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: September 12, 1989
    Inventor: William H. Marshall
  • Patent number: 4836302
    Abstract: Method and apparatus for removing oil-based drilling mud from drill cuttings in order to prepare the drill cuttings for an environmentally safe disposal in the sea. A solvent in the range of solvents which may be condensed by ambient seawater and vaporized by heated internal combustion engine coolant is utilized in the process. The method of this invention includes the steps of transporting oil-based mud-laden cuttings to a solid feed tank wherein the oil-based cuttings are subjected to turbulent mixing to leave the surface of the cuttings substantially free of oil. The cuttings are then transported to a countercurrent flow column and subjected to countercurrent, laminar flow of solvent in order to separate oily solvent and fines smaller than a chosen diameter from the heavier solids. The heavier solids are cleaned of any remaining oil-based muds, separated from cleaning solvent and ultimately returned to the sea environment.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: June 6, 1989
    Inventors: Joe K. Heilhecker, Robert E. Williams, William H. Marshall