Impeller mounting system for a personal watercraft

Details Impeller mounting system for a personal watercraft Impeller mounting system for a personal watercraft

1996-09-25

1998-06-02

Basinger, Sherman

Marine propulsion

Jet drive

416244B, 440 83, B63H 1108

Patent

active

057590745

ABSTRACT:
An impeller mounting system for a jet propelled watercraft uses an impeller shaft having a tapered portion and an impeller hub having a coaxial opening with a corresponding tapered seat. The impeller hub is tightened onto the impeller shaft so that the tapered portion of the impeller shaft presses against the tapered seat of the coaxial opening in the impeller hub with sufficient force to prevent the impeller hub from slipping with respect to the impeller shaft when the impeller shaft rotates to drive the impeller hub. Static frictional forces between the tapered surfaces bear the entire rotational load for the jet drive, therefore reducing chatter noise and wear which can be caused by load bearing splines or the like. The tapered seat configuration virtually assures proper concentric alignment of the impeller within the wear ring. The impeller shaft also preferably includes a bearing support portion extending rearward from the coaxial opening in the hub. The bearing support portion of the impeller shaft is preferably supported rigidly in a bearing support sleeve located in the hub of a stator mounted rearward of the impeller. This impeller mounting system facilitates easy assembly and disassembly when it is desirable to replace the impeller or otherwise provide maintenance to the jet drive.

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