Patents by Inventor Bo Carl Fredrik Löfgren

Bo Carl Fredrik Löfgren 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).

  • Air-spring compensation in a piston-type marine vibrator
    Patent number: 10488536
    Abstract: Embodiments relate to the restriction of gas flow in a piston-type marine vibrator to compensate for air-spring effects. An embodiment provides marine vibrator comprising: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and to the fixture; a driver coupled to the piston plate and to the fixture; and a variable gas flow restrictor disposed in an interior volume of the marine vibrator, wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: November 26, 2019
    Assignee: PGS Geophysical AS
    Inventors: Stig Rune Lennart Tenghamn, Jonathan David Snodgrass, Bo Carl Fredrik Löfgren, Karl-Henrik Ryttersson
  • Gas spring compensation marine acoustic vibrator
    Patent number: 9864080
    Abstract: Embodiments related to restriction of gas flow in a marine acoustic vibrator to compensate for gas spring effects. An embodiment provides a marine acoustic vibrator, comprising: an outer shell; and a variable gas flow restrictor disposed within the outer shell; wherein the marine acoustic vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: January 9, 2018
    Assignee: PGS Geophysical AS
    Inventors: Stig Rune Lennart Tenghamn, Jonathan David Snodgrass, Bo Carl Fredrik Löfgren, Karl-Henrik Ryttersson
  • Air-spring compensation in a piston-type marine vibrator
    Patent number: 9507037
    Abstract: Embodiments relate to the restriction of gas flow in a piston-type marine vibrator to compensate for air-spring effects. An embodiment provides marine vibrator comprising: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and to the fixture; a driver coupled to the piston plate and to the fixture; and a variable gas flow restrictor disposed in an interior volume of the marine vibrator, wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: November 29, 2016
    Assignee: PGS Geophysical AS
    Inventors: Stig Rune Lennart Tenghamn, Jonathan David Snodgrass, Bo Carl Fredrik Löfgren, Karl-Henrik Ryttersson
  • Air-Spring Compensation in a Piston-Type Marine Vibrator
    Publication number: 20150085608
    Abstract: Embodiments relate to the restriction of gas flow in a piston-type marine vibrator to compensate for air-spring effects. An embodiment provides marine vibrator comprising: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and to the fixture; a driver coupled to the piston plate and to the fixture; and a variable gas flow restrictor disposed in an interior volume of the marine vibrator, wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor.
    Type: Application
    Filed: August 18, 2014
    Publication date: March 26, 2015
    Applicant: PGS GEOPHYSICAL AS
    Inventors: Stig Rune Lennart Tenghamn, Jonathan David Snodgrass, Bo Carl Fredrik Löfgren, Karl-Henrik Ryttersson
  • Gas Spring Compensation Marine Acoustic Vibrator
    Publication number: 20140340985
    Abstract: Embodiments related to restriction of gas flow in a marine acoustic vibrator to compensate for gas spring effects. An embodiment provides a marine acoustic vibrator, comprising: an outer shell; and a variable gas flow restrictor disposed within the outer shell; wherein the marine acoustic vibrator has a resonance frequency selectable based at least in part on the variable gas flow restrictor.
    Type: Application
    Filed: December 31, 2013
    Publication date: November 20, 2014
    Applicant: PGS GEOPHYSICAL AS
    Inventors: Stig Rune Lennart Tenghamn, Jonathan David Snodgrass, Bo Carl Fredrik Löfgren, Karl-Henrik Ryttersson