Back to results
US 12,129,008 B2Granted
Marine propulsion unit
AssigneeABB Schweiz AG
InventorsAki Maksimainen, Veli-Pekka Peljo, Petri Pellinen
Life of this patent
Estimating the term…
Abstract
A marine propulsion unit including a rotary casing rotatable about a central axis A, and blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B. A blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasable attached to the rotary casing, and each blade being supported in the blade housing by means of bearings for the pivotal movement.
Claims33
A marine propulsion unit comprising:
- a rotary casing rotatable about a central axis A, and
- blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B,
- characterized:
- by a blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasably attached to the rotary casing, and
- by each blade being supported in the blade housing by means of bearings for said pivotal movement,
- by the rotary casing comprising a lower surface that is configured to be in direct contact with water,
- by mounting seats being designed and dimensioned to allow inserting and removal of a blade housing having a blade supported in the blade housing by means of bearings solely from the side of lower surface of the rotary casing,
- by the rotary casing comprises a central portion,
- by each blade housing comprises a first lateral attachment member,
- by each blade housing being releasably attached to the rotary casing so that the first lateral attachment member of each blade housing being attached to a corresponding second lateral attachment member provided laterally at the central portion of the rotary casing.
7 more elements
A marine propulsion unit comprising:
- a rotary casing rotatable about a central axis A, and
- blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B,
- characterized:
- by a blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasably attached to the rotary casing, and
- by each blade being supported in the blade housing by means of bearings for said pivotal movement,
- by the rotary casing comprising a lower surface that is configured to be in direct contact with water,
- by mounting seats being designed and dimensioned to allow inserting and removal of a blade housing having a blade supported in the blade housing by means of bearings solely from the side of lower surface of the rotary casing,
- by the marine propulsion unit comprising a mounting body,
- by the rotary casing being rotatable mounted at said mounting body for said rotation about the central axis A,
- by the rotary casing having a hollow interior,
- by the marine propulsion unit being provided with a manhole arrangement for providing access to the hollow interior of the rotary casing, and
- by the manhole arrangement leading through the mounting body into the hollow interior of the rotary casing.
9 more elements
A marine propulsion unit comprising:
- a rotary casing rotatable about a central axis A, and
- blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B,
- characterized:
- by a blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasably attached to the rotary casing, and
- by each blade being supported in the blade housing by means of bearings for said pivotal movement,
- by the rotary casing comprising a lower surface that is configured to be in direct contact with water,
- by mounting seats being designed and dimensioned to allow inserting and removal of a blade housing having a blade supported in the blade housing by means of bearings solely from the side of lower surface of the rotary casing,
- by the blade housing comprising a bolt flange at the blade housing, and
- by the bolt flange being configured to co-operate with fastening means at the rotary casing for releasably attaching the blade housing to the rotary casing.
6 more elements
A marine propulsion unit comprising:
- a rotary casing rotatable about a central axis A, and
- blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B,
- characterized:
- by a blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasably attached to the rotary casing, and
- by each blade being supported in the blade housing by means of bearings for said pivotal movement,
- by the rotary casing comprising a lower surface that is configured to be in direct contact with water,
- by mounting seats being designed and dimensioned to allow inserting and removal of a blade housing having a blade supported in the blade housing by means of bearings solely from the side of lower surface of the rotary casing,
- by the rotary casing having a hollow interior, and
- by the marine propulsion unit being provided with a manhole arrangement for providing access to the hollow interior of the rotary casing.
6 more elements
A combination of a marine vessel and a marine propulsion unit, wherein the marine propulsion unit comprises:
- a rotary casing rotatable about a central axis A, and
- blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B,
- characterized:
- by a blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasably attached to the rotary casing, and
- by each blade being supported in the blade housing by means of bearings for said pivotal movement,
- by the rotary casing comprising a lower surface that is configured to be in direct contact with water,
- by mounting seats being designed and dimensioned to allow inserting and removal of a blade housing having a blade supported in the blade housing by means of bearings solely from the side of lower surface of the rotary casing, and
- by the rotary casing having a hollow interior and by the rotary casing being provided with a manhole arrangement for providing a passage between the hollow interior of the rotary casing and the marine vessel.
5 more elements
A marine propulsion unit comprising:
- a rotary casing rotatable about a central axis A, and
- blades extending axially from the rotary casing for rotation with the rotary casing about the central axis A, wherein each blade is mounted for pivotal movement about blade axes B,
- characterized:
- by a blade shaft portion of each blade is at least partly surrounded by a blade housing and by a blade portion of each blade is outside the blade housing, wherein the blade housing is releasably attached to the rotary casing, and
- by each blade being supported in the blade housing by means of bearings for said pivotal movement,
- by the rotary casing comprises a central portion,
- by each blade housing comprises a first lateral attachment member, and
- by each blade housing being releasably attached to the rotary casing so that the first lateral attachment member of each blade housing being attached to a corresponding second lateral attachment member provided laterally at the central portion of the rotary casing.
5 more elements
Dependencies are inferred from the claim text.