IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0648316
(2009-12-29)
|
등록번호 |
US-8206191
(2012-06-26)
|
발명자
/ 주소 |
- Ota, Nobuharu
- Sato, Hideyoshi
|
출원인 / 주소 |
- Yamaha Hatsudoki Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
8 |
초록
▼
A water jet propulsion watercraft includes a pair of jet propulsion devices arranged right and left of a hull centerline. Each jet propulsion device includes a jetting unit arranged to jet water, a deflector supported on the hull and arranged to rotate to right and left, the deflector including a fo
A water jet propulsion watercraft includes a pair of jet propulsion devices arranged right and left of a hull centerline. Each jet propulsion device includes a jetting unit arranged to jet water, a deflector supported on the hull and arranged to rotate to right and left, the deflector including a forward drive jet port and a reverse drive jet port. Each jet propulsion device includes a bucket arranged to change between a forward drive position and a reverse drive position. The bucket includes a reflecting surface arranged to reflect the water jetted from the forward drive jet port when the bucket is at the reverse drive position, and an auxiliary nozzle including an entrance opened to the reflecting surface and arranged to jet water introduced into the entrance along a hull right/left direction. The entrance of the auxiliary nozzle is spaced away from the forward drive jet port in the hull right/left direction and does not oppose the forward drive jet port in a state where the bucket is arranged at the reverse drive position and the deflector is arranged at the straight drive position.
대표청구항
▼
1. A water jet propulsion watercraft comprising: a hull; anda pair of jet propulsion devices attached to the hull and arranged to the right and left of a hull centerline; whereineach of the pair of jet propulsion devices includes: a jetting unit arranged to jet water toward a rear of the hull;a defl
1. A water jet propulsion watercraft comprising: a hull; anda pair of jet propulsion devices attached to the hull and arranged to the right and left of a hull centerline; whereineach of the pair of jet propulsion devices includes: a jetting unit arranged to jet water toward a rear of the hull;a deflector supported on the hull and arranged to rotate, with respect to the hull, to the right and left within a predetermined rotation range including a straight drive position, the deflector including a forward drive jet port and a reverse drive jet port, the deflector arranged to change a jetting direction of the water jetted from the jetting unit; anda bucket supported on the hull independently of the deflector so as to be displaced between a forward drive position retreated from the forward drive jet port and a reverse drive position of blocking the forward drive jet port;the bucket includes: a reflecting surface arranged to receive the water jetted from the forward drive jet port and to reflect the water toward an inner side of the deflector when the bucket is at the reverse drive position; andan auxiliary nozzle including an entrance opened to the reflecting surface and arranged to jet water introduced into the entrance along a hull right/left direction; whereinthe entrance of the auxiliary nozzle is spaced away from the forward drive jet port in the hull right/left direction and does not oppose the forward drive jet port in a state where the bucket is arranged at the reverse drive position and the deflector is arranged at the straight drive position;a water flow is not jetted from either of a pair of the auxiliary nozzles respectively provided in a pair of the buckets respectively provided in the pair of right and left jet propulsion devices when the pair of the buckets are at the reverse drive positions and a pair of the deflectors respectively provided in the pair of right and left propulsion devices are at the straight drive positions; anda water flow is jetted from one of the pair of auxiliary nozzles respectively provided in the pair of the buckets and a water flow is not jetted from the other of the pair of auxiliary nozzles when the pair of the buckets are at the reverse drive position and the pair of the deflectors are rotated to either the right or the left from the straight drive positions. 2. The water jet propulsion watercraft according to claim 1, wherein the pair of the auxiliary nozzles respectively corresponding to the pair of jet propulsion devices are arranged to jet water in directions that are right/left symmetrical. 3. The water jet propulsion watercraft according to claim 1, wherein the entrance of the auxiliary nozzle is arranged so as to be positioned further away from the hull centerline in the hull right/left direction than the forward drive jet port and so as to not oppose the forward drive jet port in the state where the bucket is arranged at the reverse drive position and the deflector is arranged at the straight drive position, and the auxiliary nozzle is arranged such that the water introduced into the entrance is jetted along the hull right/left direction and toward the hull centerline. 4. A water jet propulsion watercraft comprising: a hull; anda pair of jet propulsion devices attached to the hull and arranged to the right and left of a hull centerline; whereineach of the pair of jet propulsion devices includes: a jetting unit arranged to jet water toward a rear of the hull;a deflector supported on the hull and arranged to rotate, with respect to the hull, to the right and left within a predetermined rotation range including a straight drive position, the deflector including a forward drive jet port and a reverse drive jet port, the deflector arranged to change a jetting direction of the water jetted from the jetting unit; anda bucket supported on the hull independently of the deflector so as to be displaced between a forward drive position retreated from the forward drive jet port and a reverse drive position of blocking the forward drive jet port;the bucket includes: a reflecting surface arranged to receive the water jetted from the forward drive jet port and to reflect the water toward an inner side of the deflector when the bucket is at the reverse drive position; andan auxiliary nozzle including an entrance opened to the reflecting surface and arranged to jet water introduced into the entrance along a hull right/left direction; whereinthe entrance of the auxiliary nozzle is spaced away from the forward drive jet port in the hull right/left direction and does not oppose the forward drive jet port in a state where the bucket is arranged at the reverse drive position and the deflector is arranged at the straight drive position; andthe auxiliary nozzle includes a tunnel portion that defines a flow path in communication with the entrance and running in the hull right/left direction along an outer surface of the bucket. 5. The water jet propulsion watercraft according to claim 1, wherein the entrance is configured to receive a portion of the water jetted from the deflector when the bucket is arranged at the reverse drive position and the forward drive jet port of the deflector opposes the entrance. 6. The water jet propulsion watercraft according to claim 1, further comprising: a nozzle interlocking mechanism arranged to interlockingly rotate the pair of the deflectors to the right and left; anda bucket interlocking mechanism arranged to interlockingly displace the pair of the buckets between the forward drive positions and the reverse drive positions. 7. The water jet propulsion watercraft according to claim 1, wherein the reverse drive jet port of the deflector is arranged to jet a water flow toward a front of the hull when the bucket is arranged at the reverse drive position. 8. The water jet propulsion watercraft according to claim 7, wherein the reverse drive jet port is arranged such that a water flow jetting direction when the deflector is at the straight drive position is a direction that includes a component directed away from the hull centerline. 9. The water jet propulsion watercraft according to claim 7, wherein the hull includes a hull bottom with a shape that becomes higher from a center to the sides, and the reverse drive jet port is arranged such that the water flow jetting direction when the deflector is at the straight drive position is a direction that includes a component directed toward the hull centerline. 10. The water jet propulsion watercraft according to claim 7, wherein a pair of the reverse drive jet ports respectively provided in the pair of right and left jet propulsion devices are arranged such that the pair of the reverse drive jet ports when the deflectors are at the straight drive positions are non-parallel to each other and are right/left symmetrical. 11. The water jet propulsion watercraft according to claim 7, further comprising: an intake opening at the hull bottom; andan intake duct arranged to guide water sucked in from the intake to the deflector; whereinthe reverse drive jet port is arranged such that the water flow jetting direction when the deflector is at the straight drive position is a direction that is shifted away from the intake. 12. A water jet propulsion watercraft comprising: a hull; anda pair of jet propulsion devices attached to the hull and arranged to the right and left of a hull centerline; whereineach of the pair of jet propulsion devices includes: a jetting unit arranged to jet water toward a rear of the hull;a deflector supported on the hull and arranged to rotate, with respect to the hull, to the right and left within a predetermined rotation range including a straight drive position, the deflector including a forward drive jet port opened toward the rear of the hull and a reverse drive jet port opened toward a front of the hull, the deflector arranged to change a jetting direction of the water jetted from the jetting unit; anda bucket supported on the hull so as to be displaced between a forward drive position retreated from the forward drive jet port and a reverse drive position of blocking the forward drive jet port; whereinone of a pair of the deflectors respectively provided in the pair of jet propulsion devices has the reverse drive jet port including a port portion extending in a right front direction of the hull when the pair of the deflectors are at the straight drive position, while the other of the pair of the deflectors has the reverse drive jet port including a port portion extending in a left front direction of the hull when the pair of the deflectors are at the straight drive position; anda pair of the port portions provided in the respective reverse drive jet ports of the pair of the deflectors extend non-parallel to each other. 13. The water jet propulsion watercraft according to claim 12, wherein the reverse drive jet port of the deflector is arranged to jet a water flow toward the front of the hull when the bucket is arranged at the reverse drive position. 14. A water jet propulsion watercraft comprising: a hull; anda pair of jet propulsion devices attached to the hull and arranged to the right and left of a hull centerline; whereineach of the pair of jet propulsion devices includes: a jetting unit arranged to jet water toward a rear of the hull;a deflector supported on the hull and arranged to rotate, with respect to the hull, to the right and left within a predetermined rotation range including a straight drive position, the deflector including a forward drive jet port opened toward the rear of the hull and a reverse drive jet port opened toward a front of the hull, the deflector arranged to change a jetting direction of the water jetted from the jetting unit; anda bucket supported on the hull so as to be displaced between a forward drive position retreated from the forward drive jet port and a reverse drive position of blocking the forward drive jet port; whereinthe reverse drive jet port is arranged such that a water flow jetting direction when the deflector is at the straight drive position is a direction that includes a component directed away from a vertical plane through the hull centerline. 15. A water jet propulsion watercraft comprising: a hull; and a pair of jet propulsion devices attached to the hull and arranged to the right andleft of a hull centerline; whereineach of the pair of jet propulsion devices includes: a jetting unit arranged to jet water toward a rear of the hull;a deflector supported on the hull and arranged to rotate, with respect to the hull, to the right and left within a predetermined rotation range including a straight drive position, the deflector including a forward drive jet port opened toward the rear of the hull and a reverse drive jet port opened toward a front of the hull, the deflector arranged to change a jetting direction of the water jetted from the jetting unit; anda bucket supported on the hull so as to be displaced between a forward drive position retreated from the forward drive jet port and a reverse drive position of blocking the forward drive jet port; whereinthe hull includes a hull bottom with a shape that becomes higher from a center to the sides, and the reverse drive jet port is arranged such that the water flow jetting direction when the deflector is at the straight drive position is a direction that includes a component directed toward the hull centerline. 16. The water jet propulsion watercraft according to claim 12, wherein the pair of right and left reverse drive jet ports are arranged such that the water flow jetting directions when the deflectors are at the straight drive positions are right/left symmetrical. 17. The water jet propulsion watercraft according to claim 12, further comprising: an intake opening at the hull bottom; andan intake duct arranged to guide the water sucked in from the intake to the deflector; whereinthe reverse drive jet port is arranged such that the water flow jetting direction when the deflector is at the straight drive position is a direction that is shifted away from the intake. 18. The water jet propulsion watercraft according to claim 1, wherein a water flow is jetted from the reverse port of the deflector provided in the jet propulsion device corresponding to the other of the pair of the auxiliary nozzles when the pair of the buckets are at the reverse drive positions and the pair of the deflectors are rotated to either the right or the left from the straight drive positions. 19. The water jet propulsion watercraft according to claim 1, wherein the one of the pair of the auxiliary nozzles is arranged to jet water toward right of the hull and the other of the pair of the auxiliary nozzles is arranged to jet water toward left of the hull; a water flow is jetted from the one of the pair of the auxiliary nozzles, and a water flow is not jetted from the other of the pair of the auxiliary nozzles when the pair of the buckets are at the reverse drive positions and the pair of the deflectors are rotated to the left drive positions; anda water flow is jetted from the other of the pair of the auxiliary nozzles, and a water flow is not jetted from the one of the pair of the auxiliary nozzles when the pair of the buckets are at the reverse drive positions and the pair of the deflectors are rotated to the right drive positions. 20. The water jet propulsion watercraft according to claim 1, wherein the forward drive jet port is opened toward the rear of the hull, and the reverse drive port is opened toward a front of the hull.
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