公开(公告)号：US06530812B2

公开(公告)日：2003-03-11

申请号：US09813438

申请日：2001-03-19

申请人： Satoshi Koyano ,  Hisato Yamada ,  Koju Tsukahara ,  Tsuide Yanagihara ,  Yusuke Aoyama ,  Yoshihiro Gahara

发明人： Satoshi Koyano ,  Hisato Yamada ,  Koju Tsukahara ,  Tsuide Yanagihara ,  Yusuke Aoyama ,  Yoshihiro Gahara

IPC分类号： B63H1100

CPC分类号： B63H25/46 ,  B63B35/731 ,  B63H11/107

摘要： A jet propulsion unit for a small watercraft including a secondary thrust arrangement. The secondary thrust arrangement includes a primary valve and a secondary valve arrangement. At least one discharge port is disposed on a hull of the watercraft. A jet propulsion unit is configured to discharge pressurized water from the steering nozzle in a substantially rearward direction from the watercraft or to discharge pressurized water through at least one discharge port disposed in the outer surface of the hull to achieve enhanced steering control of the watercraft.