Patents by Inventor Sergio A. Castillo, Jr.

Sergio A. Castillo, Jr. 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).

  • Seal with extended wear sleeve
    Patent number: 5931476
    Abstract: A bore seal assembly for sealing between first and second adjoining tubular members which comprises a cylindrical seal sleeve having a bore and two radially outwardly extending sealing lips for engaging a seal pocket formed in the adjoining ends of the first and second tubular members, a cylindrical wear sleeve mounted within the bore for supporting the seal sleeve within the seal pocket, and an elongated erosion sleeve extending longitudinally from the wear sleeve into at least the first tubular member, whereby the erosion sleeve protects the first tubular member against erosion.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: August 3, 1999
    Assignee: FMC Corporation
    Inventors: Tep Ungchusri, Sergio A. Castillo, Jr.
  • Bore seal assembly with wear ring having curvilinear spring support surface
    Patent number: 5624124
    Abstract: A bore seal assembly for sealing between adjoining tubular members having a seal pocket formed in the adjacent ends thereof which comprises a cylindrical seal sleeve having a bore and two radially outwardly extending sealing lips for engaging the seal pocket, a cylindrical finger spring mounted within the bore of the seal sleeve and having an annular central section and a plurality of fingers extending axially outwardly therefrom for urging the sealing lips against the seal pocket, and a cylindrical wear sleeve having a curvilinear outer diameter for supporting the fingers and transferring the contact point between the fingers and the wear sleeve toward the ends of the fingers to thereby increase the stiffness of the fingers and maintain a spring force sufficient to overcome the force caused by contraction of the seal sleeve in low temperatures.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: April 29, 1997
    Assignee: FMC Corporation
    Inventors: Tep Ungchusri, Sergio A. Castillo, Jr.
  • Load segment assembly with wire rope
    Patent number: 5383694
    Abstract: A load segment assembly for use in pipe swivel joints or pipe connectors locks male and female hubs of a joint together while providing an axial bearing therebetween. The load assembly includes arcuate segments each having a dove-tail groove on the face of the convex side of the arcuate segment, requiring a flexible joining member to be threaded therethrough, providing maximum shear and bearing strength.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: January 24, 1995
    Assignee: FMC Corporation
    Inventors: Ralph Taeuber, Jr., Sergio A. Castillo, Jr., Robert H. Ash, Jr.
  • Pipe swivel joint with improved bore seal
    Patent number: 5149148
    Abstract: A pipe swivel joint with male and female hubs and an improved bore seal assembly having an anti-extrusion ring that axially energizes the swivel joint hubs toward their operational position as the joint is assembled.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: September 22, 1992
    Assignee: FMC Corporation
    Inventors: Ralph Taeuber, Jr., Sergio A. Castillo, Jr., Tep Ungchusri