Patents by Inventor Patrick RAWLS

Patrick RAWLS 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).

  • Dual barrier seal
    Patent number: 11635142
    Abstract: An annular dual barrier seal includes a pair of axially extending inner seal lips and a pair of axially extending outer seal lips, the pair of inner seal lips are connected to the pair of outer seal lips by a radially outwardly extending web portion. The pair of inner seal lips extend axially by a first dimension and the pair of outer seal lips extend axially by a second dimension which is greater than the first dimension. The pair of inner seal lips have a sealing surface that is one of partially toroidal and partially elliptical and that engage the radially inwardly facing first sealing surface and the pair of outer seal lips have a sealing surface that is one of partially toroidal, partially elliptical and conical.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: April 25, 2023
    Assignee: Freudenberg Oil & Gas, LLC
    Inventors: Nagarjuna Jillella, Ian Smitham, Patrick Rawls, Keith Anderson, James Smith, Sebastian Ospina
  • DUAL BARRIER SEAL
    Publication number: 20210148468
    Abstract: An annular dual barrier seal includes a pair of axially extending inner seal lips and a pair of axially extending outer seal lips, the pair of inner seal lips are connected to the pair of outer seal lips by a radially outwardly extending web portion. The pair of inner seal lips extend axially by a first dimension and the pair of outer seal lips extend axially by a second dimension which is greater than the first dimension. The pair of inner seal lips have a sealing surface that is one of partially toroidal and partially elliptical and that engage the radially inwardly facing first sealing surface and the pair of outer seal lips have a sealing surface that is one of partially toroidal, partially elliptical and conical.
    Type: Application
    Filed: November 14, 2019
    Publication date: May 20, 2021
    Inventors: Nagarjuna JILLELLA, Ian SMITHAM, Patrick RAWLS, Keith ANDERSON, James SMITH, Sebastian OSPINA