US3580204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement in ships
Assignee: B WARTSILA MERITEOLLISUUS OF HERNESAARENRANTA 11 00150 HELSINKI FINLAND Oy
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Filing: 1968-11-12
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Granted: 1971-05-25
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Expires: 1988-11-12
Abstract
Abstract An arrangement in ships, especially in ships moving in ice filled waters, the arrangement comprising underwater/air blowing openings at the side of the ship, preferably in the bow area of the ship. By blowing air through the openings a strong upwards directed water flow is produced which at the water surface bows sidewards. This water flow can be used to facilitate the moving of the ship in ice filled waters and as an auxiliary steering means.
Inventors
- 👤 Fred Burmeister
- 👤 Ernst Enkvist
- 👤 Bengt Johansson
- 👤 Valter Kostilainen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:00
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; B63B2001/387; B63B2211/00; B63B2211/06; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A ship comprising a hull with a bow portion, said bow portion having a plurality of underwater openings along both sides in a substantially horizontal alignment below the waterline and means for discharging compressed air through said openings, all of said openings being submerged below the waterline by a distance which is at least 30 percent of the draft of said hull, the dimensions and number of said openings and the output of said air discharging means being such that air is blown through said openings at a volumetric rate sufficient to cause an upwardly directed flow of water along the side of said ship to produce a substantial ridge of water at the water surface along the side of said hull and thus generate a water flow which moves laterally away from the side of said hull whereby to reduce resistance to advancement of the ship in ice filled water.
Claim 2
Dependent Claim
151 words
A ship comprising a hull with a bow portion, said bow portion having a plurality of underwater openings along both sides in a substantially horizontal alignment below the waterline and means for discharging compressed air through said openings, all of said openings being submerged below the waterline by a distance which is at least 30 percent of the draft of said hull, the dimensions and number of said openings and the output of said air discharging means being such that air is blown through said openings at a volumetric rate sufficient to cause an upwardly directed flow of water along the side of said ship to produce a substantial ridge of water at the water surface along the side of said hull and thus generate a water flow which moves laterally away from the side of said hull whereby to reduce resistance to advancement of the ship in ice filled water.
Claim 3
Dependent Claim
19 words
A ship according to claim 1, in which said openings are provided in the bow part of said hull.
Claim 4
Dependent Claim
28 words
A ship according to claim 2, comprising air exhaust regulating means operable so that air can be blown through said openings from one side of said hull only.
Claim 5
Dependent Claim
41 words
A ship according to claim 1, in which the dimensions and number of said openings and the output of said air discharging means are such that said ridge reaches a height of from 25 to 50 cm. above the water level.
Claim 6
Dependent Claim
30 words
A ship according to claim 1, in which said openings are at a level below the wAter surface which is at least 50 percent of the draft of said hull.
Claim 7
Dependent Claim
38 words
A ship according to claim 1, in which said ship has drive machinery therefor and said air discharging means comprises a compressor and means for transmitting driving power to said compressor from the drive machinery of the ship.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |