Patents by Inventor David K. Washburn

David K. Washburn 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: 9206025
    Abstract: An apparatus is disclosed that serves as an attachment for a forklift truck or the like for handling multiple drums simultaneously. The drums to be transported are arranged symmetrically in a cluster about a central vertical axis. The apparatus includes a slidable suspension plate that connects to a latching device adapted to clamp onto the rim of each drum in the cluster. The sliding movement of the suspension plate is confined to a linear path of travel by guide rails. The limited forward/rearward linear movement aids in locating the clamping device accurately relative to the central vertical axis of the cluster.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: December 8, 2015
    Assignee: Delta Petroleum Company, Inc.
    Inventors: Fredy Sierra, Juan Francisco Leija, Miguel Angel Salazar, Armando Ernesto Martinez, Phung Minh Nguyen, Mariano Paulin, Marlo Gomez, Jesus Garcia, David K. Washburn, Jackie S. Mote
  • Publication number: 20140049062
    Abstract: An apparatus is disclosed that serves as an attachment for a forklift truck or the like for handling multiple drums simultaneously. The drums to be transported are arranged symmetrically in a cluster about a central vertical axis. The apparatus includes a slidable suspension plate that connects to a latching device adapted to clamp onto the rim of each drum in the cluster. The sliding movement of the suspension plate is confined to a linear path of travel by guide rails. The limited forward/rearward linear movement aids in locating the clamping device accurately relative to the central vertical axis of the cluster.
    Type: Application
    Filed: August 19, 2013
    Publication date: February 20, 2014
    Applicant: Delta Petroleum Company, Inc.
    Inventors: Fredy Sierra, Juan Francisco Leija, Miguel Angel Salazar, Armando Ernesto Martinez, Phung Minh Nguyen, Mariano Paulin, Marlo Gomez, Jesus Garcia, David K. Washburn, Jackie S. Mote
  • Publication number: 20040045190
    Abstract: Winter boots and shoes can be equipped with a removable traction attachment that facilitates easy non-slip motion on ice, snow, dirt, gravel, etc. The traction attachment can include an elastomeric panel fitting the sole of the boot or shoe, an integral front strap system fitting over the toe of the boot, and an integral rear strap system fitting snugly on the heel of the boot. The panel and strap systems have controlled elasticity, so that a given size attachment can fit a range of different size boots or shoes. Replaceable metal cleats are carried on downwardly protruding sections of the elastomeric panel, to provide traction assistance.
    Type: Application
    Filed: September 7, 2002
    Publication date: March 11, 2004
    Inventors: David K. Washburn, David B. Gould, Anne C. Gould
  • Patent number: D559514
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: January 15, 2008
    Assignee: 32north Corporation
    Inventors: Douglas E. Norton, David K. Washburn, Daniel J Richard
  • Patent number: D559515
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: January 15, 2008
    Assignee: 32north Corporation
    Inventors: Douglas E. Norton, David K Washburn, Daniel J Richard
  • Patent number: D559516
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: January 15, 2008
    Assignee: 32north Corporation
    Inventors: Douglas E. Norton, David K Washburn, Daniel J Richard
  • Patent number: D560890
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: February 5, 2008
    Assignee: 32north Corporation
    Inventors: Douglas E. Norton, David K Washburn, Daniel J Richard