Patent US4509925A successfully refreshed from Google Patents.
US4509925A
Expired / Lapsed
US
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Marine vessel propeller with nozzle
Assignee: Sulzer Escher Wyss AG
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Filing: 1983-05-23
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Granted: 1985-04-09
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Expires: 2003-05-23
Abstract
Abstract The marine vessel propeller has vanes or blades containing outer edges which are bounded by circularly domed outer surfaces which coact with a spherical zone of a spherical surface formed at the inner surface of the nozzle. The common central point of the spherical zone and of the circularly domed outer surfaces of the vanes or blades is located at the intersection point of the vane axes and about each of which vane axis the related propeller vane or blade is pivotable. The intersection point of such vane axes is located on the propeller axis.
Inventors
- 👤 Wolfgang Wuhrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:51
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/07; B63H5/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
287 words
A marine vessel propeller with nozzle through which flows water comprising: a propeller defining a propeller axis; vanes each defining a vane axis and each pivotable about their corresponding vane axis into a selectable predetermined angular position to form a predetermined angle of attack; said vane axes intersecting at an intersection point located on said propeller axis; each said vane extending to both sides of said vane axis and forming an outer edge defined by a domed outer surface; said domed outer surface substantially forming portions of a spherical surface possessing a central point and a radius; said central point being located at said intersection point; said nozzle comprising an inner surface provided with a substantially spherical zone possessing a radius and a central point which is also located at said intersection point; said radius of said spherical zone being greater than said radius of said spherical surface of said domed outer surface in order to form a predetermined gap; said spherical zone extending upstream and downstream of a circular intersection line formed by the intersection of a surface described by said vane axes during rotation of said vanes about said propeller axis and said spherical zone; said domed outer surface of each pivotable vane and said spherical zone of said nozzle which form therebetween said predetermined gap coacting with one another such as to maintain said predetermined gap essentially constant throughout the region of said spherical zone irrespective of the angular position assumed by said pivotable vane; said domed outer surface of each said vane possessing ends and said spherical zone provided at said inner surface of said nozzle forming margins; and said ends and said margins substantially coinciding at the largest vane angle of attack.
Claim 2
Dependent Claim
287 words
A marine vessel propeller with nozzle through which flows water comprising: a propeller defining a propeller axis; vanes each defining a vane axis and each pivotable about their corresponding vane axis into a selectable predetermined angular position to form a predetermined angle of attack; said vane axes intersecting at an intersection point located on said propeller axis; each said vane extending to both sides of said vane axis and forming an outer edge defined by a domed outer surface; said domed outer surface substantially forming portions of a spherical surface possessing a central point and a radius; said central point being located at said intersection point; said nozzle comprising an inner surface provided with a substantially spherical zone possessing a radius and a central point which is also located at said intersection point; said radius of said spherical zone being greater than said radius of said spherical surface of said domed outer surface in order to form a predetermined gap; said spherical zone extending upstream and downstream of a circular intersection line formed by the intersection of a surface described by said vane axes during rotation of said vanes about said propeller axis and said spherical zone; said domed outer surface of each pivotable vane and said spherical zone of said nozzle which form therebetween said predetermined gap coacting with one another such as to maintain said predetermined gap essentially constant throughout the region of said spherical zone irrespective of the angular position assumed by said pivotable vane; said domed outer surface of each said vane possessing ends and said spherical zone provided at said inner surface of said nozzle forming margins; and said ends and said margins substantially coinciding at the largest vane angle of attack.
Claim 3
Dependent Claim
41 words
The marine vessel propeller as efined in claim 1, wherein: said spherical zone forms an upstream section and a downstream section extending downstream and upstream, respectively, of said circular intersection line; and said downstream section is larger than said upstream section.
Claim 4
Dependent Claim
34 words
The marine vessel propeller as defined in claim 1, wherein: said surface described by said vane axes during rotation of said vanes forms a plane extending substantially normally with respect to said propeller axis.
Claim 5
Dependent Claim
37 words
The marine vessel propeller as defined in claim 1, wherein: said vane axes of said vanes are inclined at an angle downstream and away with respect to a plane extending normally with respect to said propeller axis.
Claim 6
Dependent Claim
72 words
The marine vessel propeller as defined in claim 4, wherein: said margins of said spherical zone of said nozzle include an upstream margin; and said inclination angle of said vane axes with respect to said plane extending substantially normally relative to said propeller axis is selected such that said upstream margin is located at the region of a plane extending substantially normally relative to said propeller axis and through said intersection point.
Claim 7
Dependent Claim
70 words
The marine vessel propeller as defined in claim 4, wherein: said margins of said spherical zone of said nozzle include an upstream margin; and said inclination angle of said vane axes with respect to said plane extending substantially normaly relative to said propeller axis is selected such that said upstream margin is located upstream of a plane extending substantially normally relative to said propeller axis and through said intersection point.
Claim 8
Dependent Claim
20 words
The marine vessel propeller as defined in claim 1, wherein: said spherical zone on said nozzle constitutes a machined surface.
Claim 9
Dependent Claim
274 words
A marine vessel propeller with nozzle through which flows water comprising: a propeller defining a propeller axis; vanes each defining a vane axis and each pivotable about their corresponding vane axis into a selectable predetermined angular position to form a predetermined angle of attack; said vane axes intersecting at an intersection point located on said propeller axis; each said vane extending to both sides of said vane axis and forming an outer edge defined by a domed outer surface; said domed outer surface substantially forming portions of a spherical surface possessing a central point and a radius; said central point being located at said intersection point; said nozzle comprising an inner surface provided with a substantially spherical zone possessing a radius and a central point which is also located at said intersection point; said radius of said spherical zone being greater than said radius of said spherical surface of said domed outer surface in order to form a predetermined gap; said spherical zone extending upstream and downstream of intersection points formed by the intersection thereof with said vane axes when said propeller is stationary; said domed outer surface of each pivotable vane and said spherical zone of said nozzle which form therebetween said predetermined gap coacting with one another such as to maintain said predetermined gap essentially constant throughout the region of said spherical zone irrespective of the angular position assumed by said pivotable vane; said domed outer surface of each said vane forming ends and said spherical zone provided at said inner surface of said nozzle forming margins; and said ends and said margins substantially coinciding at the largest vane angle of attack.
Claim 10
Dependent Claim
274 words
A marine vessel propeller with nozzle through which flows water comprising: a propeller defining a propeller axis; vanes each defining a vane axis and each pivotable about their corresponding vane axis into a selectable predetermined angular position to form a predetermined angle of attack; said vane axes intersecting at an intersection point located on said propeller axis; each said vane extending to both sides of said vane axis and forming an outer edge defined by a domed outer surface; said domed outer surface substantially forming portions of a spherical surface possessing a central point and a radius; said central point being located at said intersection point; said nozzle comprising an inner surface provided with a substantially spherical zone possessing a radius and a central point which is also located at said intersection point; said radius of said spherical zone being greater than said radius of said spherical surface of said domed outer surface in order to form a predetermined gap; said spherical zone extending upstream and downstream of intersection points formed by the intersection thereof with said vane axes when said propeller is stationary; said domed outer surface of each pivotable vane and said spherical zone of said nozzle which form therebetween said predetermined gap coacting with one another such as to maintain said predetermined gap essentially constant throughout the region of said spherical zone irrespective of the angular position assumed by said pivotable vane; said domed outer surface of each said vane forming ends and said spherical zone provided at said inner surface of said nozzle forming margins; and said ends and said margins substantially coinciding at the largest vane angle of attack.
Claim 11
Dependent Claim
40 words
The marine vessel propeller as defined in claim 8, wherein: said spherical zone forms an upstream section and a downstream section extending downstream and upstream, respectively, of ssid intersection points; and said downstream section is larger than said upstream section.
Claim 12
Dependent Claim
22 words
The marine vessel propeller as defined in claim 8, wherein: said vane axes extend substantially normally with respect to said propeller axis.
Claim 13
Dependent Claim
28 words
The marine vessel propeller as defined in claim 8, wherein: said vane axes of said vanes are inclined at an angle downstream with respect to said propeller axis.
Claim 14
Dependent Claim
65 words
The marine vessel propeller as defined in claim 11, wherein: said margins of said spherical zone of said nozzle include an upstream margin; and said inclination angle of said vane axes with respect to said propeller axis is selected such that said upstream margin is located at the region of a line extending substantially normally relative to said propeller axis and through said intersection point.
Claim 15
Dependent Claim
63 words
The marine vessel propeller as defined in claim 11, wherein: said margins of said spherical zone on said nozzle include an upstream margin; and said inclination angle of said vane axes with respect to said propeller axis is selected such that said upstream margin is located upstream of a line extending substantially normally relative to said propeller axis and through said intersection point.
Claim 16
Dependent Claim
20 words
The marine vessel propeller as defined in claim 8, wherein: said spherical zone on said nozzle constitutes a machined surface.
Claim 17
Dependent Claim
76 words
The marine vessel propeller as defined in claim 1, wherein: said vane axis about which there is pivotable the corresponding vane being located intermediate said vane ends and intersecting said spherical zone intermediate said margins thereof; and said domed outer surface of each pivotable vane and said spherical zone of said nozzle coacting with one another such as to inhibit expansion of the flow of water through said nozzle at the region of said spherical zone.
Claim 18
Dependent Claim
20 words
The marine vessel propeller as defined in claim 1, wherein: said nozzle is stationarily arranged relative to said pivotal vanes.
Claim 19
Dependent Claim
76 words
The marine vessel propeller as defined in claim 8, wherein: said vane axis about which there is pivotable the corresponding vane being located intermediate said vane ends and intersecting said spherical zone intermediate said margins thereof; and said domed outer surface of each pivotable vane and said spherical zone of said nozzle coacting with one another such as to inhibit expansion of the flow of water through said nozzle at the region of said spherical zone.
Claim 20
Dependent Claim
20 words
The marine vessel propeller as defined in claim 8, wherein: said nozzle is stationarily arranged relative to said pivotal vanes.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |