EP 1587732 A2 20051026 - VARIABLE MARINE JET PROPULSION
Title (en)
VARIABLE MARINE JET PROPULSION
Title (de)
VARIABLER WASSERSTRAHLANTRIEB
Title (fr)
SYSTEME DE PROPULSION PAR JET D'EAU VARIABLE
Publication
Application
Priority
- US 0339296 W 20031210
- US 43228102 P 20021210
Abstract (en)
[origin: WO2004052721A2] A variable marine jet propulsion system incorporates a motor, a variable-pitch propeller pump in a spherical housing, a variable housing and a variable inlet duct, and a microcontroller. The pump, the nozzle and the inlet are controlled by the microcontroller, which is programmed to control the pump as a continuously variable power transmission for maintaining efficient motor operation, the nozzle for maintaining efficient pump operation, and the inlet for maintaining efficient recovery of the total dynamic head of the incoming water. The spherical pump housing maintains close fits to the propeller vane tips for more efficient operation at all pitches, including zero and reverse pitches. Zero pitch results in no effective pumping action, effectively a true neutral in fluid power transmission. Reverse pitch in combination with the large variable nozzle provides reverse flow and consequently reverse thrust, which eliminates the need for the "backing bucket".
IPC 1-7
IPC 8 full level
B63H 11/103 (2006.01); B63H 11/08 (2006.01); B63H 25/02 (2006.01); B63H 25/04 (2006.01)
CPC (source: EP)
B63H 11/08 (2013.01); B63H 11/103 (2013.01); B63H 25/02 (2013.01); B63H 25/04 (2013.01); B63H 2011/043 (2013.01); B63H 2011/046 (2013.01); B63H 2011/081 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004052721 A2 20040624; WO 2004052721 A3 20040902; AU 2003297835 A1 20040630; AU 2003297835 B2 20101223; CA 2509047 A1 20040624; CA 2509047 C 20110201; EP 1587732 A2 20051026; EP 1587732 A4 20110413; NZ 541125 A 20070531
DOCDB simple family (application)
US 0339296 W 20031210; AU 2003297835 A 20031210; CA 2509047 A 20031210; EP 03796906 A 20031210; NZ 54112503 A 20031210