Patents by Inventor David Purvis

David Purvis 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: 10227047
    Abstract: An adjustable retainer for attaching a receptacle, such as a thermal cooler, to a vehicle includes a frame for securing to a vehicle, such as a truck bed. Opposing jaws are movable in guide slots in the frame. One jaw may be manually positioned in a guide slot having hooks, while the other jaw is movable by a linear actuator secured to the frame. The jaws allow optimum positioning of the receptacle and create a vice-like retaining mechanism.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: March 12, 2019
    Inventor: David Purvis
  • Publication number: 20180257576
    Abstract: An adjustable retainer for attaching a receptacle, such as a thermal cooler, to a vehicle includes a frame for securing to a vehicle, such as a truck bed. Opposing jaws are movable in guide slots in the fame. One jaw may be manually positioned in a guide slot having hooks, while the other jaw is movable by a linear actuator secured to the frame. The jaws allow optimum positioning of the receptacle and create a vice-like retaining mechanism.
    Type: Application
    Filed: March 6, 2018
    Publication date: September 13, 2018
    Inventor: David Purvis
  • Patent number: 7391221
    Abstract: One exemplary device has a plurality of leads with termination impedances, and a standard impedance. Among the termination impedances are master impedances arranged to be calibrated by comparison with the standard impedance and slave impedances arranged to be calibrated in accordance with an associated master impedance.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: June 24, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jayen J. Desai, James M. Dewey, David Purvis
  • Publication number: 20070013395
    Abstract: One exemplary device has a plurality of leads with termination impedances, and a standard impedance. Among the termination impedances are master impedances arranged to be calibrated by comparison with the standard impedance and slave impedances arranged to be calibrated in accordance with an associated master impedance.
    Type: Application
    Filed: June 24, 2005
    Publication date: January 18, 2007
    Inventors: Jayen Desai, James Dewey, David Purvis
  • Patent number: 6283930
    Abstract: The disclosed travel massage brush is an ultra-compact vibrating hair brush that comfortably fits an average woman's or man's hand in the hair brushing or massage modes. It is light in weight and portable permitting grooming and/or soothing scalp or body massage anywhere, at any time. Pivotally connected vibratory brush-head and handle subassemblies provide maximum space saving portability, making the travel massage brush ideal for taking along to the gym, to work, or while traveling. The vibratory brush-head subassembly includes a bristle carrier that is removably attached to a base member thereof and preferably slides on and off the base member to allow for convenient bristle cleaning and to access the battery compartment. Gentle ball-tipped bristles stimulate circulation to hair follicles.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: September 4, 2001
    Assignee: Headwaters Research & Development, Inc.
    Inventors: Grant David Purvis, David M. Raffo, Troy Gene Anderson, Rudy Anthony Vandenbelt
  • Patent number: 6111156
    Abstract: A combined chain of a high temperature, high conversion steam cracker in combination with a polymerization or oligomerization unit provides capital and operating cost reduction.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: August 29, 2000
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Michael C. Oballa, David Purvis, Andrzej Z. Krzywicki, Leslie W. Benum
  • Patent number: 6071215
    Abstract: A multi-mode exercise machine has a re-configurable arm member operable in alternate upstanding and recumbent configurations that allows the machine to be used, when the re-configurable arm member is configured in its upright configuration, to provide a first mode of exercise where the user is supported in such an upright position as to be able to exercise at least his/her lower body, and that allows the machine to be used, when the re-configurable arm member is configured in its recumbent configuration, to provide a second mode of exercise, where the user is supported in such a recumbent position as to allow the user to exercise at least his/her upper body. In the presently preferred embodiment, the re-configurable arm member includes a pivotally mounted and self-locking arm member movable between a first, upright position and a second, recumbent position. In the presently preferred embodiment, the first and second exercise modes include cycling and rowing exercise modes.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: June 6, 2000
    Inventors: David M. Raffo, Grant David Purvis
  • Patent number: 5981818
    Abstract: A novel process is provided which integrates the cracking of hydrocarbon containing feedstocks with the olefins purification and olefins derivative process utilizing dilute olefin feedstocks.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: November 9, 1999
    Assignee: Stone & Webster Engineering Corp.
    Inventors: David Purvis, Richard H. Mc Cue
  • Patent number: D406650
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: March 9, 1999
    Assignee: Headwaters Research & Development, Inc.
    Inventors: Grant David Purvis, David M. Raffo, Troy Gene Anderson, Rudy Anthony Vandenbelt