Jet-propulsion watercraft
US6478638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Aug 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H25/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A jet-propulsion watercraft can maintain steering capability even during throttle-close operation as the amount of water ejected from a water jet pump is thereby reduced. Engine speed is increased by a push-pull cable provided between a rotational shaft of a steering handle and a throttle lever. The throttle lever is forced to rotate which opens a throttle valve according to the amount of steering. Alternatively, the engine speed is increased by increasing a fuel of an auxiliary air-fuel mixture supplying system provided independently of a main air-fuel mixture supplying system while a throttle-close operation and a steering handle operation are detected. The auxiliary supplying system is provided in a position of an air supplying passage to the main supplying system and an air-fuel mixture supplying passage of the main supplying system directly or indirectly through a predetermined connecting passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.