Patents by Inventor William D. Stevenson

William D. Stevenson 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).

  • Vertical stressed mooring tether in a floating oil platform
    Patent number: 4364323
    Abstract: A floating platform intended to be anchored to the sea bed incorporates a substantially vertical tether. The tether is fitted with a gas-operated tension spring device capable of generating an elastic tensile force in the tether. Means is provided for varying the nominal tensile force which the spring device is capable of exerting. The tether may include an adjustor nut movable along a screw-threaded portion of the tether so as to be engageable with an adjustor nut adaptor supported by the platform.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: December 21, 1982
    Assignee: Vickers Limited
    Inventor: William D. Stevenson
  • Tensioner device for offshore oil production and exploration platforms
    Patent number: 4215950
    Abstract: A tensioner device which operates in conjunction with an oil production riser incorporates a gimbal device having two relatively movable elements. One of said elements is connectible to the riser and to one of the relatively movable members of at least one pair of tensioner cylinder and piston units and the other member is connectible to a platform supporting the tensioner device. Guiding members carried by the other element of the gimbal device are operative to guide the gimbal device in a direction axially of the riser.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: August 5, 1980
    Assignee: Brown Brothers & Company, Ltd.
    Inventor: William D. Stevenson