US3636904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Icebreaker equipment for ships
Assignee: GRENOBLOISE ETUDE APPL
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Filing: 1970-01-14
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Granted: 1972-01-25
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Expires: 1990-01-14
Abstract
Abstract The icebreaker ship herein disclosed has means for cutting a slit in an ice layer mounted on its prow forwardly of the ship''s stempost, and set back from such cutting means, are means enabling the ship to bear its weight down on the slit portion of the ice layer so as to break the latter into pieces of ice. Located rearwardly of the bearing means are guiding means for immersing the ice pieces below the ice layer and coacting with the sides of the ship''s prow to force the immersed ice pieces laterally so that they are pushed beneath the ice layer.
Inventors
- 👤 Charles Blanchet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:29
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A ship comprising ice cutting means mounted on the forward end thereof for initially engaging an ice layer on the water and cracking the same as the ship advances, means associated with said cutting means enabling the ship to bear its weight down on the cracked portion of the ice layer so as to break the latter into pieces of ice and form a channel through the ice layer, and guiding means for immersing such ice pieces to a level below the underside of the ice layer, said guiding means comprising two guiding elements extending longitudinally along the sides of the ship''s prow and having bottom surfaces inclining rearwardly downwardly, said two guiding elements being constructed and arranged to coact with convex portions of the ship''s prow to thrust the ice pieces immersed thereby laterally beneath the sides of the channel made by the ship through the ice layer.
Claim 2
Dependent Claim
149 words
A ship comprising ice cutting means mounted on the forward end thereof for initially engaging an ice layer on the water and cracking the same as the ship advances, means associated with said cutting means enabling the ship to bear its weight down on the cracked portion of the ice layer so as to break the latter into pieces of ice and form a channel through the ice layer, and guiding means for immersing such ice pieces to a level below the underside of the ice layer, said guiding means comprising two guiding elements extending longitudinally along the sides of the ship''s prow and having bottom surfaces inclining rearwardly downwardly, said two guiding elements being constructed and arranged to coact with convex portions of the ship''s prow to thrust the ice pieces immersed thereby laterally beneath the sides of the channel made by the ship through the ice layer.
Claim 3
Dependent Claim
25 words
A ship as defined in claim 1, in which said guiding elements have a substantially triangular configuration in plan view and are progressively reduced rearwardly.
Claim 4
Dependent Claim
68 words
A ship as defined in claim 1, in which the bottom surfaces of said guiding elements incline rearwardly downwardly through a longitudinal distance having a height of inclination at least as great as the thickness of the layer of ice, and in which the outer side edges of said bottom surfaces are spaced apart a distance at least as great as the overall width of the ship''s hull.
Claim 5
Dependent Claim
78 words
A ship as defined in claim 1, including cutting means mounted on the outer side edges of said guiding elements and having downwardly projecting cutting edges adapted to cut the ice along the sides of a channel made by the ship in the ice layer, said cutting means being mounted on the forward end portions of said outer side edges so as not to interfere with the lateral discharge of the ice pieces from beneath said guiding elements.
Claim 6
Dependent Claim
57 words
A ship as defined in claim 1, in which said cutting means is mounted on the ship''s stem, in which said guiding elements are a pair of fins extending laterally from opposite sides of the ship''s prow, and in which said weight applying means is constituted of the prow''s bottom intermediate said cutting means and said fins.
Claim 7
Dependent Claim
31 words
A ship as defined in claim 1, in which said cutting means, weight applying means and guiding elements are provided on unitary means mounted on and projectIng from the ship''s prow.
Claim 8
Dependent Claim
35 words
A ship as defined in 1, including means movably supporting said cutting means to enable the latter to be oriented in direction, and means operable to change the direction of operation of said cutting means.
Claim 9
Dependent Claim
35 words
A ship as defined in 1, including means movably supporting said cutting means to enable the latter to be oriented in direction, and means operable to change the direction of operation of said cutting means.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |