Patents by Inventor Elisio Caetano Filho

Elisio Caetano Filho 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).

  • System and method of multiple-phase pumping
    Patent number: 6783331
    Abstract: A pump system for multi-phase fluids that includes a drive-shaft (11), mechanical differential units (12, 22, 23, 23′, D1 . . . Dn) and pumps (14, 14′, 25, 25′, 25″, 25′″, B1 . . . Bn) where the differential units allow for the changing of pump rotation speeds between pumps(14, 14′, 25, 25′, 25″, 25′″, B1 . . . Bn) so as to adjust the compressibility of fluids in order to reduce or eliminate circulatory flow. There is also a description of the method of operating the system according to the invention.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: August 31, 2004
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: Divonsir Lopes, Elisio Caetano Filho
  • System and method of multiple-phase pumping
    Publication number: 20030049138
    Abstract: A pump system for multi-phase fluids that includes a drive-shaft (11), mechanical differential units (12, 22, 23, 23′, D1 . . . Dn) and pumps (14, 14′, 25, 25′, 25″, 25′″, B1 . . . Bn) where the differential units allow for the changing of pump rotation speeds between pumps(14, 14′, 25, 25′, 25″, 25′″, B1 . . . Bn) so as to adjust the compressibility of fluids in order to reduce or eliminate circulatory flow. There is also a description of the method of operating the system according to the invention.
    Type: Application
    Filed: August 20, 2002
    Publication date: March 13, 2003
    Inventors: Divonsir Lopes, Elisio Caetano Filho