US 12,606,290 B2Granted

Marine propulsion device

AssigneeYamaha Hatsudoki Kabushiki Kaisha

InventorsKimitaka Saruwatari, Akihiro Noma, Masanari Mori, Yushi Fujita, Hiroaki Kageyama, Shinobu Murouchi

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Abstract

A marine propulsion device includes a first gear, a second gear, a third gear, a circulator, a case, and an attachment body. The second gear is meshed with the first gear. The third gear is meshed with the first gear, and the third gear is coaxial with the second gear and opposed to the second gear. The circulator is between the second gear and the third gear. The case includes an internal space in which the first gear, the second gear, the third gear, and the circulator are located. The case includes an attachment hole to which the circulator is attached. The attachment body is inserted into the attachment hole so as to attach the circulator to the case.

Claims7

Dependent claims

A marine propulsion device comprising:

a first gear;
a second gear meshed with the first gear;
a third gear meshed with the first gear, the third gear being coaxial to the second gear and opposed to the second gear;
a circulator between the second gear and the third gear;
a case including an internal space in which the first gear, the second gear, the third gear, and the circulator are located, the case including an attachment hole to which the circulator is attached;
and
an attachment body inserted into the attachment hole to attach the circulator to the case;
wherein
the attachment hole includes female threads on an inner peripheral surface thereof;
the attachment body includes male threads at least on a distal end thereof;
the attachment body is inserted into the attachment hole and through the circulator;
and
the male threads of the attachment body are screwed into the female threads of the attachment hole.

10 more elements

A marine propulsion device comprising:

a first gear;
a second gear meshed with the first gear;
a third gear meshed with the first gear, the third gear being coaxial to the second gear and opposed to the second gear;
a circulator between the second gear and the third gear;
a case including an internal space in which the first gear, the second gear, the third gear, and the circulator are located, the case including an attachment hole to which the circulator is attached;
and
an attachment body inserted into the attachment hole to attach the circulator to the case;
wherein
a circulator body including a second through hole in which the attachment body is disposed, the second through hole including a first opening and a second opening, the first opening opposed to the attachment hole, and the second opening provided on an opposite side of the first opening;
a restrictor fastened to the circulator body so as to close the second opening of the second through hole, the restrictor operable to restrict the attachment body in the attachment hole and the second through hole from moving out of the second opening;
and
a fastener to fasten the restriction member to the circulator body.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/234,917Filed 17 Aug 2023
Priority: JP 2022-1611485 Oct 2022
Published: US 2024/0116618 A111 Apr 2024
Granted: 21 Apr 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B63H 23/06
With mechanical gearing: for transmitting drive from a single propulsion power unit
B63H 20/20
Transmission between propulsion power unit and propulsion element: with provision for reverse drive
B63H 23/30
Transmitting power from propulsion power plant to propulsive elements: characterised by use of clutches
B63H
Marine propulsion or steering