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US 2024/0190546 A1Published application
Marine propulsion device and marine vessel
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorYoshitaka KAN
Life of this patent
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Abstract
A marine propulsion device includes an entry suppressor extending circumferentially between an inner peripheral surface of a duct and an outer peripheral surface of a rim in a radial direction of a rotor to reduce or prevent entry of foreign matter into a gap between the inner peripheral surface of the duct and the outer peripheral surface of the rim. The entry suppressor has a thickness larger than a minimum width of the gap and smaller than a maximum width of the gap in the radial direction of the rotor.
Claims20
A marine propulsion device comprising:
- a duct including a stator;
- a propeller including a rim including a rotor radially inward of the stator and facing the stator, and blades radially inward of the rim;
- and
- an entry suppressor made of an expansible and shrinkable material and extending circumferentially between an inner peripheral surface of the duct and an outer peripheral surface of the rim in a radial direction of the rotor to reduce or prevent entry of foreign matter into a gap between the inner peripheral surface of the duct and the outer peripheral surface of the rim in the radial direction;
- wherein
- the entry suppressor has a thickness larger than a minimum width of the gap and smaller than a maximum width of the gap in the radial direction.
3 more elements
A marine vessel comprising:
- a hull;
- and
- a marine propulsion device attached to the hull;
- wherein
- the marine propulsion device includes:
- a duct including a stator;
- a propeller including a rim including a rotor radially inward of the stator and facing the stator, and blades radially inward of the rim;
- and
- an entry suppressor made of an expansible and shrinkable material and extending circumferentially between an inner peripheral surface of the duct and an outer peripheral surface of the rim in a radial direction of the rotor to reduce or prevent entry of foreign matter into a gap between the inner peripheral surface of the duct and the outer peripheral surface of the rim in the radial direction;
- and
- the entry suppressor has a thickness larger than a minimum width of the gap and smaller than a maximum width of the gap in the radial direction.
8 more elements
Dependencies are inferred from the claim text.