Patents by Inventor Benjamin E. Westbrook

Benjamin E. Westbrook 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).

  • Wide range temperature and pressure hydraulic cylinder sealing system
    Patent number: 8840115
    Abstract: A seal system for a reciprocating cylinder includes a buffer seal, a rod seal, and a wiper seal. The buffer seal includes a dynamic seal lip and a static lip extending from a hinge portion. The hinge portion of the static lip allows fluid to escape past the outer diameter of the seal when the rod is retracted thereby releasing any pressure build-up between the rod seal and buffer seal. The axial face portion of the dynamic seal lip includes axially extending notches therein. The notches prevent the buffer seal from sticking to the axial wall of the groove and provide a consistent path for the fluid to energize the annular groove between the static and dynamic lips during the extension phase which is necessary for the function of the seal. The back-up ring is an integrated part of the buffer seal, used to provide superior extrusion resistance.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: September 23, 2014
    Assignees: Freudenberg-NOK General Partnership, Carl Freudenberg KG, NOK Corporation
    Inventors: Joel T. Johnson, Benjamin E. Westbrook, Noriyuki Matsui, Yoshiyuki Abe, Takeshi Wakana, Mathias Burkert
  • Wide Range Temperature and Pressure Hydraulic Cylinder Sealing System
    Publication number: 20080217864
    Abstract: A seal system for a reciprocating cylinder includes a buffer seal, a rod seal, and a wiper seal. The buffer seal includes a dynamic seal lip and a static lip extending from a hinge portion. The hinge portion of the static lip allows fluid to escape past the outer diameter of the seal when the rod is retracted thereby releasing any pressure build-up between the rod seal and buffer seal. The axial face portion of the dynamic seal lip includes axially extending notches therein. The notches prevent the buffer seal from sticking to the axial wall of the groove and provide a consistent path for the fluid to energize the annular groove between the static and dynamic lips during the extension phase which is necessary for the function of the seal. The back-up ring is an integrated part of the buffer seal, used to provide superior extrusion resistance.
    Type: Application
    Filed: March 9, 2007
    Publication date: September 11, 2008
    Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventors: Joel T. Johnson, Benjamin E. Westbrook, Noriyuki Matsui, Yoshiyuki Abe, Takeshi Wakana, Mathias Burkert