Patents by Inventor Stephen Earl Smith

Stephen Earl Smith 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).

  • Piston pump with barrier fluid seal
    Patent number: 10378522
    Abstract: A piston pump including a cylinder body having an internal fluid chamber, a piston configured to axially cycle within the cylinder body, an inlet valve, an outlet valve, an annular seal positioned between the piston and cylinder body, a barrier fluid pocket formed in the cylinder body adjacent one end of the annular seal, and a barrier fluid contained within the barrier fluid pocket, the barrier fluid preventing suspended solids in pumped fluid from contacting the annular seal.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: August 13, 2019
    Assignee: CDI ENERGY PRODUCTS, INC.
    Inventor: Stephen Earl Smith
  • PISTON PUMP WITH BARRIER FLUID SEAL
    Publication number: 20150204316
    Abstract: A piston pump including a cylinder body having an internal fluid chamber, a piston configured to axially cycle within the cylinder body, an inlet valve, an outlet valve, an annular seal positioned between the piston and cylinder body, a barrier fluid pocket formed in the cylinder body adjacent one end of the annular seal, and a barrier fluid contained within the barrier fluid pocket, the barrier fluid preventing suspended solids in pumped fluid from contacting the annular seal.
    Type: Application
    Filed: January 23, 2015
    Publication date: July 23, 2015
    Inventor: Stephen Earl Smith