US3791328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ice removal track
Assignee: Air Logistics Corp
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Filing: 1972-06-19
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Granted: 1974-02-12
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Expires: 1992-06-19
Abstract
Abstract There is provided a system for cutting thin ice ahead of a vessel into essentially triangular shaped blocks and moving the ice blocks under the surface of the ice. The system consists essentially of a centrally located ice cutter mounted on a vessel, two pivoting ice cutters which traverse a path between the central ice cutter and the extremities of an expanded framework mounted on port and starboard sides of the vessel. Each framework also contains a cutter which intersects the path cut by the traversing ice cutters. By their cooperative action, the ice is cut into a series of triangular shaped blocks which separate the blocks about the centerline of the vessel. The framework on the port and starboard sides of the vessel then acts to progressively move the blocks away from the vessel and under the surface of the ice providing an open water path through the ice which exceeds the width of the path provided.
Inventors
- 👤 J Schirtzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:42
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/08; B63B35/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
An ice removal system for cutting an open path through thin ice on the port and starboard sides of a vessel which comprises: a. a first ice cutting means centrally mounted on the bow of a vessel and adapted to cut a path through ice; b. a pair of pivotably mounted ice cutting means each respectively adapted to cut a traversing path through ice extending from the first ice cutting means and beyond the port and starboard sides of the vessel; c. a pair of frameworks secured to the port and starboard sides of the vessel, each framework respectively extending beyond the side of the vessel and providing: i. ice cutting means adapted to substantially intersect the path cut by one of said pivotably mounted ice cutting means and ii. means to engage and urge cut blocks of ice away from the vessel and under the uncut surface of the ice.
Claim 2
Dependent Claim
151 words
An ice removal system for cutting an open path through thin ice on the port and starboard sides of a vessel which comprises: a. a first ice cutting means centrally mounted on the bow of a vessel and adapted to cut a path through ice; b. a pair of pivotably mounted ice cutting means each respectively adapted to cut a traversing path through ice extending from the first ice cutting means and beyond the port and starboard sides of the vessel; c. a pair of frameworks secured to the port and starboard sides of the vessel, each framework respectively extending beyond the side of the vessel and providing: i. ice cutting means adapted to substantially intersect the path cut by one of said pivotably mounted ice cutting means and ii. means to engage and urge cut blocks of ice away from the vessel and under the uncut surface of the ice.
Claim 3
Dependent Claim
15 words
An ice removal system as claimed in claim 1 in which each framework is retractable.
Claim 4
Dependent Claim
30 words
An ice removal system as claimed in claim 1 in which each ice cutting means consists of a plurality of ice chipping blades secured to a motor driven rotatable shaft.
Claim 5
Dependent Claim
65 words
An ice removal system as claimed in claim 1 in which the means to urge blocks of cut ice away from the vessel and under the surface of the ice consists of a plurality of inclined runners projecting downwardly from each framework the runners adapted to progressively engage blocks of cut ice and move them away from the vessel under the surface of the ice.
Claim 6
Dependent Claim
197 words
An ice removal system for cutting an open path through thin ice on the port and starboard sides of a vessel which comprises: a. a first ice cutting means centrally mounted on the bow of a vessel and adapted to cut a path through ice; b. a pair of pivotably mounted ice means each adapted to cut a traverse path through ice extending from the first ice cutting means to beyond the port and starboard sides of the vessel; c. a pair of expandable frameworks secured to the port and starboard sides of the vessel, each framework respectively adapted to expand to project outwardly from the side of the vessel and providing: i. ice cutting means positioned at about the extremity of the framework, said ice cutting means adapted to be positioned to intersecT the traverse path cut by a pivotably mounted ice cutting means; and ii. means to engage and urge cut blocks of ice away from the vessel and under the uncut surface of the ice; d. means associated with each expandable framework to extend said expandable framework from the side of the vessel and return said expandable framework to the side of the vessel.
Claim 7
Dependent Claim
197 words
An ice removal system for cutting an open path through thin ice on the port and starboard sides of a vessel which comprises: a. a first ice cutting means centrally mounted on the bow of a vessel and adapted to cut a path through ice; b. a pair of pivotably mounted ice means each adapted to cut a traverse path through ice extending from the first ice cutting means to beyond the port and starboard sides of the vessel; c. a pair of expandable frameworks secured to the port and starboard sides of the vessel, each framework respectively adapted to expand to project outwardly from the side of the vessel and providing: i. ice cutting means positioned at about the extremity of the framework, said ice cutting means adapted to be positioned to intersecT the traverse path cut by a pivotably mounted ice cutting means; and ii. means to engage and urge cut blocks of ice away from the vessel and under the uncut surface of the ice; d. means associated with each expandable framework to extend said expandable framework from the side of the vessel and return said expandable framework to the side of the vessel.
Claim 8
Dependent Claim
30 words
An ice removal system as claimed in claim 5 in which each ice cutting means consists of a plurality of ice chipping blades secured to a motor driven rotatable shaft.
Claim 9
Dependent Claim
66 words
An ice removal system as claimed in claim 5 in which the means to urge blocks of cut ice away from the vessel and under the surface of the ice consists of a plurality of inclined runners projecting downwardly from each framework the runners adapted to progressively engage blocks of cut ice and move them away from the vessel and under the surface of the ice.
References Cited (Backward Citations)
US3521592A
Cited
US3636904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |