Patents by Inventor Paulo Roberto Leite Nóbrega

Paulo Roberto Leite Nóbrega 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).

  • Compact restictive seal for bearing housings
    Patent number: 9404584
    Abstract: This certificate of addition pertains to alternative constructive methods submitted for the components of the seal, resulting in increased efficiency and durability of the device, as well as the ease of assembly thereof. Compact restrictive seal (1) derived from these constructive alternatives can be applied indiscriminately to equipment lubricated by grease, fluid oil or oil mist.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: August 2, 2016
    Assignee: PETROLEO BRASILEIRO S.A.—PETROBRAS
    Inventor: Paulo Roberto Leite Nobrega
  • COMPACT RESTICTIVE SEAL FOR BEARING HOUSINGS
    Publication number: 20140219597
    Abstract: This certificate of addition pertains to alternative constructive methods submitted for the components of the seal, resulting in increased efficiency and durability of the device, as well as the ease of assembly thereof. Compact restrictive seal (1) derived from these constructive alternatives can be applied indiscriminately to equipment lubricated by grease, fluid oil or oil mist.
    Type: Application
    Filed: January 17, 2014
    Publication date: August 7, 2014
    Applicant: PETROLEO BRASILEIRO S.A. - PETROBRAS
    Inventor: Paulo Roberto Leite NOBREGA
  • Airtight magnetic seal for bearing casings
    Patent number: 8201830
    Abstract: The airtight magnetic seal, in a compact single body, made of two concentric sections, an inner section (1a) and an outer section (1b), unitized, which are able to rotate independently. These sections are engaged and squared to create a permanent contact-seal inside in combination with two labyrinth-seals type and associated drains at each end, and a pressure relief safety means, when the seal is embedded into an annulus in a rotary operational assembly.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: June 19, 2012
    Assignee: Petróleo Brasileiro S.A.—Petrobras
    Inventor: Paulo Roberto Leite Nóbrega
  • Compact restictive seal for bearing housings
    Patent number: 7878508
    Abstract: This invention relates to a restrictive seal of the labyrinth type of reduced external size. The invention has an inner deflector which is capable of retaining the lubricating oil within the bearing housing with great efficiency, and a highly accurate system for adjusting and aligning the elements of the labyrinths, ensuring an infinite service life. Because it has very much smaller external dimensions it can be applied as a replacement to the lip seals commonly in use without causing problems to accessory equipment connected to a pump.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: February 1, 2011
    Assignee: Petróleo Brasileiro S.A.- Petrobras
    Inventor: Paulo Roberto Leite Nóbrega
  • Compact restictive seal for bearing housings
    Publication number: 20100225065
    Abstract: This invention relates to a restrictive seal of the labyrinth type of reduced external size. The invention has an inner deflector which is capable of retaining the lubricating oil within the bearing housing with great efficiency, and a highly accurate system for adjusting and aligning the elements of the labyrinths, ensuring an infinite service life. Because it has very much smaller external dimensions it can be applied as a replacement to the lip seals commonly in use without causing problems to accessory equipment connected to a pump.
    Type: Application
    Filed: March 1, 2010
    Publication date: September 9, 2010
    Applicant: PETROLEO BRASILEIRO S.A.-PETROBRAS
    Inventor: Paulo Roberto Leite Nóbrega
  • COMPACT RESTRICTIVE SEAL FOR BEARING HOUSINGS
    Publication number: 20100052264
    Abstract: This invention relates to a restrictive seal of the labyrinth type of reduced external size. The invention has an inner deflector which is capable of retaining the lubricating oil within the bearing housing with great efficiency, and a highly accurate system for adjusting and aligning the elements of the labyrinths, ensuring an infinite service life. Because it has very much smaller external dimensions it can be applied as a replacement to the lip seals commonly in use without causing problems to accessory equipment connected to a pump.
    Type: Application
    Filed: April 13, 2009
    Publication date: March 4, 2010
    Applicant: PETROLEO BRASILEIRO S.A.- PETROBRAS
    Inventor: Paulo Roberto Leite NOBREGA
  • Airtight magnetic seal for bearing casings
    Publication number: 20090315271
    Abstract: The airtight magnetic seal, in a compact single body, made of two concentric sections, an inner section (1a) and an outer section (1b), unitized, which are able to rotate independently. These sections are engaged and squared to create a permanent contact-seal inside in combination with two labyrinth-seals type and associated drains at each end, and a pressure relief safety means, when the seal is embedded into an annulus in a rotary operational assembly.
    Type: Application
    Filed: August 25, 2009
    Publication date: December 24, 2009
    Applicant: PETROLEO BRASILEIRO S.A.- PETROBRAS
    Inventor: Paulo Roberto Leite Nóbrega