Patents by Inventor Arne Rokkan

Arne Rokkan 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).

  • Geophysical acceleration sensor and method
    Patent number: 9823265
    Abstract: A method and geophysical acceleration sensor (100) for measuring seismic data and also for protecting the sensor from shock. The sensor includes a housing (102); a flexible beam (104) having a first end fixedly attached to the housing; a piezoelectric layer (108) attached to the flexible beam; a seismic mass (112) attached to the flexible beam; and a first movement limiter (130) connected to the housing and configured to limit a movement of the flexible beam. A distance between a tip of the first movement limiter and the flexible beam is adjustable.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: November 21, 2017
    Assignee: Seabed Geosolutions AS
    Inventors: Geir Valsvik, Arne Rokkan, Eldar Agdestein, Bjarne Isfeldt
  • GEOPHYSICAL ACCELERATION SENSOR AND METHOD
    Publication number: 20150338433
    Abstract: A method and geophysical acceleration sensor (100) for measuring seismic data and also for protecting the sensor from shock. The sensor includes a housing (102); a flexible beam (104) having a first end fixedly attached to the housing; a piezoelectric layer (108) attached to the flexible beam; a seismic mass (112) attached to the flexible beam; and a first movement limiter (130) connected to the housing and configured to limit a movement of the flexible beam. A distance between a tip of the first movement limiter and the flexible beam is adjustable.
    Type: Application
    Filed: December 18, 2013
    Publication date: November 26, 2015
    Inventors: Geir VALSVIK, Arne ROKKAN, Eldar AGDESTEIN, Bjarne ISFELDT
  • Seismic cable with sensor elements being heavier than the cable
    Patent number: 6483776
    Abstract: Seismic cable for placing on the sea bottom comprising two or more seismic sensor units adapted to detect vibrations in the sea floor and being separated by chosen lengths of cable. The cable is characterize in that the sensor units are substantially heavier per length unit than the cable between them.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: November 19, 2002
    Inventor: Arne Rokkan