Patents by Inventor Mac Kennedy

Mac Kennedy 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).

  • Subsea differential-area accumulator
    Patent number: 9303479
    Abstract: An accumulator for hydraulically actuating subsea equipment includes a hydraulic fluid chamber and a gas chamber. The hydraulic fluid chamber is in fluid communication with the subsea equipment and comprises a hydraulic piston slidably received, at least partially, within the hydraulic chamber. The gas chamber comprises a charge piston slidably received within the gas chamber, the charge piston dividing the gas chamber into a first portion and a second portion. The first portion of the gas chamber is configured to receive ambient hydrostatic pressure therein, and the second portion of the gas chamber is configured to receive precharge gas therein.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: April 5, 2016
    Assignee: Cameron International Corporation
    Inventors: Johnnie E. Kotrla, Mac Kennedy, Nathan Cooper
  • Subsea Differential-Area Accumulator
    Publication number: 20150101822
    Abstract: An accumulator for hydraulically actuating subsea equipment includes a hydraulic fluid chamber and a gas chamber. The hydraulic fluid chamber is in fluid communication with the subsea equipment and comprises a hydraulic piston slidably received, at least partially, within the hydraulic chamber. The gas chamber comprises a charge piston slidably received within the gas chamber, the charge piston dividing the gas chamber into a first portion and a second portion. The first portion of the gas chamber is configured to receive ambient hydrostatic pressure therein, and the second portion of the gas chamber is configured to receive precharge gas therein.
    Type: Application
    Filed: August 12, 2014
    Publication date: April 16, 2015
    Applicant: CAMERON INTERNATIONAL CORPORATION
    Inventors: Johnnie E. Kotrla, Mac Kennedy, Nathan Cooper
  • Subsea differential-area accumulator
    Patent number: 8833465
    Abstract: An accumulator for a subsea blowout preventer unit including a blowout preventer includes a body. The body includes a hydraulic fluid chamber and a gas chamber. The hydraulic fluid chamber has a smaller inner diameter than the gas chamber. The accumulator further includes a hydraulic fluid port in fluid communication between the hydraulic fluid chamber and the subsea blowout preventer, a hydraulic piston slidably and sealingly mounted in the hydraulic fluid chamber, and a charge piston slidably and sealingly mounted in the gas chamber. A pressure port receives pressure to provide a force on the opposite side of the charge piston from the hydraulic piston.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: September 16, 2014
    Assignee: Cameron International Corporation
    Inventors: Johnnie E. Kotrla, Mac Kennedy, Nathan Cooper
  • Subsea Differential-Area Accumulator
    Publication number: 20110147002
    Abstract: An accumulator for a subsea blowout preventer unit including a blowout preventer includes a body. The body includes a hydraulic fluid chamber and a gas chamber. The hydraulic fluid chamber has a smaller inner diameter than the gas chamber. The accumulator further includes a hydraulic fluid port in fluid communication between the hydraulic fluid chamber and the subsea blowout preventer, a hydraulic piston slidably and sealingly mounted in the hydraulic fluid chamber, and a charge piston slidably and sealingly mounted in the gas chamber. A pressure port receives pressure to provide a force on the opposite side of the charge piston from the hydraulic piston.
    Type: Application
    Filed: August 4, 2009
    Publication date: June 23, 2011
    Applicant: CAMERON INTERNATIONAL CORPORATION
    Inventors: Johnnie E. Kotrla, Mac Kennedy, Nathan Cooper