US5246393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rudder propeller with nozzle
Assignee: Individual
•
Filing: 1992-03-13
•
Granted: 1993-09-21
•
Expires: 2012-03-13
Abstract
Abstract The nozzle ring associated with the propeller and rotatable together with it around the vertical axis is designed as a partially open annulus and arranged such that the inner circle of the nozzle--and consequently practically the wing tip circle as well--approximately touches the respective local separating surface between the flow and the floating body or boat.
Inventors
- 👤 Norbert von der Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:48
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/42; B63H5/00; B63H5/07; B63H5/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
In a rudder propeller for boats or floating bodies having a hull and a bottom surface, the rudder propeller having an associated nozzle to form a hydrodynamic drive that is rotatable around a vertical axis, the rudder propeller being mounted on the hull, and the drive power being transmitted by an essentially vertical stem to a bevel gear located in a hub pivotable with the stem around an axis of rotation which propels an approximately horizontal propeller shaft, the improvement wherein the nozzle comprises a nozzle ring having a gap disposed proximate said bottom surface so that the distance between the nozzle center and the outer circumference of the nozzle ring is greater than the shortest distance between the nozzle center and said bottom surface.
Claim 2
Dependent Claim
125 words
In a rudder propeller for boats or floating bodies having a hull and a bottom surface, the rudder propeller having an associated nozzle to form a hydrodynamic drive that is rotatable around a vertical axis, the rudder propeller being mounted on the hull, and the drive power being transmitted by an essentially vertical stem to a bevel gear located in a hub pivotable with the stem around an axis of rotation which propels an approximately horizontal propeller shaft, the improvement wherein the nozzle comprises a nozzle ring having a gap disposed proximate said bottom surface so that the distance between the nozzle center and the outer circumference of the nozzle ring is greater than the shortest distance between the nozzle center and said bottom surface.
Claim 3
Dependent Claim
29 words
Rudder propeller in accordance with claim 1, further comprising a plate-shaped fastening element, the nozzle being connected to the stem proximate the bottom surface via said plate-shaped fastening element.
Claim 4
Dependent Claim
25 words
Rudder propeller in accordance with claim 1, further comprising a disk connected between the stem and nozzle, and disposed in a recess in the hull.
Claim 5
Dependent Claim
17 words
Rudder propeller in accordance with claim 3, wherein the disk is cylindrical and has a flat bottom.
Claim 6
Dependent Claim
23 words
Rudder propeller in accordance with one of the claims 3 or 4, wherein the disk has a concave recess on its bottom surface.
Claim 7
Dependent Claim
36 words
Rudder propeller in accordance with one of the claims 3 or 4, wherein the disk has a concave recess and has a partial elevation in the area in which the nozzle is connected to the disk.
Claim 8
Dependent Claim
23 words
Rudder propeller in accordance with one of the claims 3 or 4, wherein the disk has a convex bulge on its bottom surface.
Claim 9
Dependent Claim
149 words
In a rudder propeller for boats or floating bodies having a hull and a bottom surface, the rudder propeller having an associated nozzle to form a hydrodynamic drive that is rotatable around a vertical axis, the rudder propeller being mounted on the hull, and the drive power being transmitted by an essentially vertical stem to a bevel gear located in a hub pivotable with the stem around an axis of rotation which propels an approximately horizontal propeller shaft, the improvement wherein there is a bulge in said bottom surface defining a propeller tunnel and the nozzle comprises a nozzle ring having a gap disposed proximate said bottom surface so that said propeller is at least partially disposed within said tunnel with the distance between the nozzle center and the outer circumference of the nozzle ring being greater than the shortest distance between the nozzle center and said bottom surface.
Claim 10
Dependent Claim
149 words
In a rudder propeller for boats or floating bodies having a hull and a bottom surface, the rudder propeller having an associated nozzle to form a hydrodynamic drive that is rotatable around a vertical axis, the rudder propeller being mounted on the hull, and the drive power being transmitted by an essentially vertical stem to a bevel gear located in a hub pivotable with the stem around an axis of rotation which propels an approximately horizontal propeller shaft, the improvement wherein there is a bulge in said bottom surface defining a propeller tunnel and the nozzle comprises a nozzle ring having a gap disposed proximate said bottom surface so that said propeller is at least partially disposed within said tunnel with the distance between the nozzle center and the outer circumference of the nozzle ring being greater than the shortest distance between the nozzle center and said bottom surface.
References Cited (Backward Citations)
US3734050A
Cited
US4175511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |