Patents Assigned to Navatek, Ltd.
  • Hull with improved trim control
    Patent number: 7380514
    Abstract: A boat hull has at least one rocker chute formed therein open to the water forward of the hull's transom. The chute has a leading edge forward of the transom and an interceptor plate projects downwardly from the hull at said leading edge.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: June 3, 2008
    Assignee: Navatek, Ltd.
    Inventors: Steven Loui, Scott Yamashita, Gary Shimozono
  • Marine propulsion steering system
    Patent number: 7357687
    Abstract: A marine propulsion steering apparatus includes a steering nozzle having a central opening therethrough which surrounds a marine propulsion drive shaft and propeller extending from a hull or propulsion module. The nozzle is pivotally mounted for angular movement in a predetermined range of movement on the support structure for the drive shaft for directing flow of water from the propeller in response to pivotal motion controlled by a steering mechanism.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: April 15, 2008
    Assignee: Navatek, Ltd.
    Inventors: Robert Gornstein, Gary Shimozono, Brian Kays
  • Watercraft hull with adjustable keel
    Patent number: 7338336
    Abstract: A watercraft hull having a pair of laterally spaced propulsion tunnels located on opposite sides of its keel, with said tunnels being open downwardly towards the water, includes a movably mounted keel section located between said propulsion tunnels to prevent water crossflow between said tunnels and increase dynamic lift on the hull.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: March 4, 2008
    Assignee: Navatek, Ltd.
    Inventors: Steven Loui, Scott Yamashita, Gary Shimozono
  • Watercraft hull with entrapment tunnel
    Patent number: 7311059
    Abstract: A watercraft hull has at least one bent entrapment tunnel with an aft portion whose tunnel ceiling is at a higher elevation than portions of the tunnel ceiling immediately in front of it to provide a negative angle of attack with the free surface at design planing speeds.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: December 25, 2007
    Assignee: Navatek, Ltd.
    Inventors: Steven Loui, Scott Yamashita, Gary Shimozono
  • Hull with propulsion tunnel and leading edge interceptor
    Patent number: 7299763
    Abstract: A boat hull has at least one ventilating propulsion tunnel formed therein open to the water forward of the hull's transom and adapted to contain a propeller of the propulsion system. The tunnel has a leading edge forward of the transom and an interceptor plate projects downwardly from the hull at the leading edge.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: November 27, 2007
    Assignee: Navatek, Ltd.
    Inventors: Steven Loui, Scott Yamashita
  • Bow lifting body
    Patent number: 7191725
    Abstract: A watercraft having a hull, a fore and aft longitudinal axis and a bow includes a three dimensional low drag submerged lifting body secured to the bow below the design waterline of the hull.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: March 20, 2007
    Assignee: Navatek, Ltd.
    Inventors: Steven Loui, Troy Keipper, Gary Shimozono, Scott Yamashita
  • Low drag submerged asymmetric displacement lifting body
    Patent number: 7004093
    Abstract: Low drag underwater submerged lifting bodies which can be used as underwater displacement portions of a vessel whose main hull is at sea level are asymmetrical and have improved lift to drag ratios. The lifting bodies have outer surfaces whose shapes are defined in plan and elevation by generally parabolic curves which are different on opposite sides of the lifting bodies.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: February 28, 2006
    Assignee: Navatek, Ltd.
    Inventors: Steven Loui, Gary Shimozono, Troy Keipper