Patents by Inventor Linnea M. Hargraves

Linnea M. Hargraves 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).

  • Solenoid valve and method of assembly thereof
    Patent number: 8393346
    Abstract: A valve assembly includes a housing having a valve bore, a valve seat, and at least one port communicating with the bore. A moveable plunger resides in the valve bore and selectively seals against the valve seat. A bobbin integral with the housing has a solenoid bore adjacent to and coaxial with the valve bore. A moveable armature resides in the solenoid bore and has an operating rod connected to the plunger. A pole piece resides in the solenoid bore adjacent the armature. A solenoid coil is wound about the bobbin. A flux conductor partially surrounding the bobbin, pole piece, and armature. An assembly method includes flowing air through the port, inserting the plunger or another sealing element into the bore while monitoring the fluid flow; and stopping the plunger or sealing element when the flow is at a preselected condition.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: March 12, 2013
    Assignee: Parker-Hannifin Corporation
    Inventors: Douglas Allan Curtis, Nathan Horst Davis, Linnea M. Hargraves
  • SOLENOID VALVE AND METHOD OF ASSEMBLY THEREOF
    Publication number: 20090321671
    Abstract: A valve assembly includes a housing having a valve bore, a valve seat, and at least one port communicating with the bore. A moveable plunger resides in the valve bore and selectively seals against the valve seat. A bobbin integral with the housing has a solenoid bore adjacent to and coaxial with the valve bore. A moveable armature resides in the solenoid bore and has an operating rod connected to the plunger. A pole piece resides in the solenoid bore adjacent the armature. A solenoid coil is wound about the bobbin. A flux conductor partially surrounding the bobbin, pole piece, and armature. An assembly method includes flowing air through the port, inserting the plunger or another sealing element into the bore while monitoring the fluid flow; and stopping the plunger or sealing element when the flow is at a preselected condition.
    Type: Application
    Filed: August 12, 2005
    Publication date: December 31, 2009
    Applicant: HARGRAVES TECHNOLOGY CORPORATION
    Inventors: Douglas Allan Curtis, Donald E. Hargraves, Linnea M. Hargraves, Nathan Horst Davis