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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6857919 |
Impeller for marine propulsion device |
Feb. 22, 2005 |
| 6857920 |
Variable venturi |
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 |
| 6062922 |
Watercraft propulsion system |
May. 16, 2000 |
| 6027383 |
Marine ducted propeller jet propulsion unit |
Feb. 22, 2000 |
| 6024614 |
High performance marine propulsion system |
Feb. 15, 2000 |
| 6022250 |
Watercraft with twin jet propulsion units |
Feb. 8, 2000 |
| 6004173 |
Marine propulsion system with bypass eductor |
Dec. 21, 1999 |
| 5989083 |
Water jet propulsion device for vessels |
Nov. 23, 1999 |
| 5975966 |
Propelling system of small boat |
Nov. 2, 1999 |
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