Patents by Inventor Rodney K Craven

Rodney K Craven 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).

  • Non chattering pressure relief valve
    Patent number: 10221953
    Abstract: A pressure relief valve includes a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve; a valve member axially moveable between a first position and a second position, the valve member configured to close the fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a friction element resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: March 5, 2019
    Assignee: PARKER-HANNIFIN CORPORATION
    Inventors: Geoffrey R. Zhang, Rodney K. Craven
  • NON CHATTERING PRESSURE RELIEF VALVE
    Publication number: 20170276254
    Abstract: A pressure relief valve includes a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve; a valve member axially moveable between a first position and a second position, the valve member configured to close the fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a friction element resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position.
    Type: Application
    Filed: June 13, 2017
    Publication date: September 28, 2017
    Inventors: Geoffrey R. Zhang, Rodney K. Craven
  • Non chattering pressure relief valve
    Patent number: 9709182
    Abstract: A pressure relief valve includes a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve; a valve member axially moveable between a first position and a second position, the valve member configured to close the fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a friction element resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: July 18, 2017
    Assignee: Parker-Hannifin Corporation
    Inventors: Geoffrey R. Zhang, Rodney K. Craven
  • NON CHATTERING PRESSURE RELIEF VALVE
    Publication number: 20160153572
    Abstract: A pressure relief valve includes a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve; a valve member axially moveable between a first position and a second position, the valve member configured to close the fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a friction element resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position.
    Type: Application
    Filed: December 22, 2015
    Publication date: June 2, 2016
    Inventors: Geoffrey R. Zhang, Rodney K. Craven
  • Non chattering pressure relief valve
    Patent number: 9303776
    Abstract: A pressure relief valve includes a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve; a valve member axially moveable between a first position and a second position, the valve member configured to close the fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a friction element resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: April 5, 2016
    Assignee: Parker-Hannifin Corporation
    Inventors: Geoffrey R Zhang, Rodney K Craven
  • NON CHATTERING PRESSURE RELIEF VALVE
    Publication number: 20140026986
    Abstract: A pressure relief valve includes a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve; a valve member axially moveable between a first position and a second position, the valve member configured to close the fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a friction element resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 30, 2014
    Inventors: Geoffrey R Zhang, Rodney K Craven