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Class Information
Number: 440/47
Name: Marine propulsion > Jet drive > Having means to increase fluid drive means efficiency
Description: Device wherein the discharge pipe can have means to improve the fluid flow or the flow passage has additional means to improve flow.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8545279 Marine propulsion system Oct. 1, 2013
8491347 Variable dimension water jet Jul. 23, 2013
8403715 Marine jet drive Mar. 26, 2013
8092265 Jet propulsion device Jan. 10, 2012
7845996 Jet pump tail cone insert Dec. 7, 2010
7798873 Design of a flush inlet as integrated with a ship hull for waterjet propulsion Sep. 21, 2010
7632061 Pump or turbine drive unit comprising such a pump or turbine and outboard motor Dec. 15, 2009
7524220 Water jet propeller Apr. 28, 2009
7470161 Lifting body water jet propulsion inlet inductor Dec. 30, 2008
7422498 Ship with wave engulfing enhanced propulsors Sep. 9, 2008
7377826 Fouling removal system for jet drive water intake May. 27, 2008
7361068 Seal pressure vent system for a waterjet apparatus Apr. 22, 2008
7357685 Jet pump tail cone insert Apr. 15, 2008
7241193 Variable marine jet propulsion Jul. 10, 2007
7238067 Variable area pump discharge system Jul. 3, 2007
7108569 Axial flow pump or marine propulsion device Sep. 19, 2006
7052339 Propulsion system for a fast seagoing ship, especially a naval ship May. 30, 2006
7004802 Tail cone assembly Feb. 28, 2006
6991499 Waterjet propulsion apparatus Jan. 31, 2006
6981902 Marine reaction thruster Jan. 3, 2006
6884129 Jet pump bearing assembly Apr. 26, 2005
6872105 Watercraft having a jet propulsion system with improved efficiency Mar. 29, 2005
6857920 Variable venturi Feb. 22, 2005
6857919 Impeller for marine propulsion device Feb. 22, 2005
6855019 Jet propulsion watercraft Feb. 15, 2005
6840826 Water jet propulsion apparatus Jan. 11, 2005
6827616 Waterjet propulsor enhancements Dec. 7, 2004
6776675 Jet propulsion boat Aug. 17, 2004
6767261 Three-dimensional vortex wake cancelling jet propulsion method Jul. 27, 2004
6729917 Water jet propulsion apparatus May. 4, 2004
6725797 Method and apparatus for propelling a surface ship through water Apr. 27, 2004
6716263 Air suction device for use in surface boat Apr. 6, 2004
6701862 Bow mounted system and method for jet-propelling a submarine or torpedo through water Mar. 9, 2004
6692318 Mixed flow pump Feb. 17, 2004
6663448 Hydraulic jet propulsion apparatus for boats Dec. 16, 2003
6645018 Boat propulsion device Nov. 11, 2003
6575109 Thruster screen Jun. 10, 2003
6508188 Drag-free hull for marine vessels Jan. 21, 2003
6431925 Jet propulsion system for watercraft Aug. 13, 2002
6427618 Bow mounted system and method for jet-propelling a submarine or torpedo through water Aug. 6, 2002
6408777 Side thruster performance improvement with speed control Jun. 25, 2002
6383040 Jet propulsion system for watercraft May. 7, 2002
6375523 Personal watercraft (PWC) variable inlet/intake grate Apr. 23, 2002
6293836 Water jet propulsion unit with means for varying area of nozzle outlet Sep. 25, 2001
6270385 Pump jet rotor housing modification for noise signature spectral control Aug. 7, 2001
6267632 Water jet propulsion apparatus with inboard mounted power source Jul. 31, 2001
6200176 Marine jet drive pump preloader for reducing cavitation Mar. 13, 2001
6193571 Enhanced waterjet propulsor Feb. 27, 2001
6139379 Jet propelled watercraft and a simplified low cost drive therefor Oct. 31, 2000
6102757 Water jet propulsion device for marine vessel Aug. 15, 2000

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