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| Number | Title | Issue Date |
| 7367457 | Device for the separation of non-magnetizable metals and ferrous components from a solid mixture and method for operating such device In an arrangement which including a motor-driven system for the separation of non-magnetisable metals, vibrations and resonances which generally are present in such arrangement, are eliminated. This is accomplished by utilizing a drum mounted on and rotating about a... | 05/06/2008 |
| 7270066 | Ice breaker (variants), method and system for single-support mooring and servicing ships To ensure the possibility of offshore shipping of a liquid medium, primarily oil, from an onshore tank farm into sea-going tankers in the winter time in the ice conditions by ensuring both mooring to an offshore terminal and single-point mooring of a tanker at any t... | 09/18/2007 |
| 4942837 | Ice breaker An icebreaker hull having laterally projecting hull components which define inclined upwardly and rearwardly sloped faces arranged in part above and in part below the vessels normal water line, and each hull component further including a longitudinally ex... | 07/24/1990 |
| 4826353 | Protection of marine installation from moving ice A drag unit to absorb the kinetic energy from large floating bodies of ice is constructed around a buoyancy chamber (14). The buoyancy chamber is attached to a torque arm (16) and this is secured at its remote end to an anchor line (6). The buoyancy chamb... | 05/02/1989 |
| 4718871 | Aquatic growth cutter An upper and a lower blade are fixed together at an adjustable angle and have means for mounting same on the leading edge of the propeller drive housing of an inboard/outboard motor to cut kelp and other seaweed which would otherwise foul the prop and clo... | 01/12/1988 |
| 4636607 | Method of enhancing an ice-breaking operation In order to perform an ice-breaking operation more readily or with a defined geometry, an ice breaking aid is employed by virtue of which the ice is irradiated with high-frequency oscillations such as phonons or photons prior to the ice-breaking operation... | 01/13/1987 |
| 4615645 | Pipeline trenching A hollow curved auger is provided for simultaneously laying and trenching a pipeline, as from the surface of an ice-covered body of water. The pipeline passes through the auger which comprises rotary teeth encircling the pipeline and turning in opposed di... | 10/07/1986 |
| 4523876 | Ice slot maintenance During winter construction of offshore Arctic pipelines, it is frequently necessary to cut an ice slot in order to lay a pipeline on the sea bottom. Once such slots are cut, they rapidly freeze over, so that it is necessary to remove ice from the slot dur... | 06/18/1985 |
| 4436046 | Ice-breaking hull An icebreaker hull is disclosed having cutting edges and sloping ramps that substantially surround the icebreaker's forefoot and taper as they continue aft along the sides of the hull. The cutting edges produce grooves in the underside of the ice to reduc... | 03/13/1984 |
| 4429653 | Means employing hydro-jets for facilitating the clearing of disaggregated ice chunks from the cutting region In order to assist ice chunks along preferred discharge paths in a large scale ice disaggregation system employing counter-rotating twin cutters, water is pumped tangentially across the trailing edges of the counter-rotating cutters against the direction ... | 02/07/1984 |
| 4422399 | Means for increasing the efficiency of an ice disaggregation system In an ice disaggregation system employing teeth affixed to a bracket which is spirally disposed around the outer periphery of a cylindrical rotating drum and held in spaced relationship therefrom, the cutting capacity is improved by tilting the plane of e... | 12/27/1983 |
| 4365571 | Ice disaggregation system Improved apparatus is disclosed for supporting the cutting teeth on the periphery of a rotating cylindrical drum ice cutter affixed to a floating arctic structure. The cutting teeth are individually removably affixed to brackets which extend spirally (eit... | 12/28/1982 |
| 4350114 | Semi-submersible tanker with directional ice cutters A tanker having a submersible hull has a mast extending above the hull supporting a bridge section. The base of the mast is journaled in the hull for rotation about a vertical axis. The bridge section is rotatably supported on the mast. Drive means rotate... | 09/21/1982 |
| 4348059 | Multiple-tine ice disaggregation system In an ice disaggregating system employing one or more rotating drums with peripherally positioned ice engaging teeth, the improvement in which the teeth are multiple-tined. In one configuration, each tooth has two equal length, pointed tines. In a preferr... | 09/07/1982 |
| 4294183 | Cutter configuration for efficient ice disaggregation and clearing In order to improve the efficiency and reliability of the cutter units employed in large scale ice disaggregation systems, a cutter configuration is employed characterized by an outwardly extending arm which sweeps rearwardly from the direction of travel ... | 10/13/1981 |
| 4276845 | Ice cutting and breaking vessel An ice cutting and breaking vessel is disclosed for providing a shipping channel through an ice layer. The bow of the vessel is provided with a plurality of reciprocating cutting blades for cutting the ice into slabs. The slabs of ice slide under the bow ... | 07/07/1981 |
| 4230423 | Ice-breaking apparatus for structure for use in icy waters A rotary ice-breaking body having a spiral rotary blade is attached to a structure for use in icy waters at a part falling in contact with an ice lump or ice floe. The rotary blade is actuated to bite into the ice lump and to lift up or press down the ice... | 10/28/1980 |
| 4198917 | Ice-breaking means for ships Disclosed are ice-breaking units for ships adapted to be installed at the bow and/or bottom portion of the ship's hull, consisting of two ice-breaking units each of which can be reversibly driven independently of each other, for performing ice-breaking an... | 04/22/1980 |
| 4170187 | Arctic drilling and production platform A mobile drilling and production platform for arctic regions in which a hull having a deck forming the production platform is supported on a first set of parallel runners secured to the underside of the hull and extending fore and aft with spaces between ... | 10/09/1979 |
| 4152999 | Ice-breaking apparatus for ships and barges for operation on icy waters An ice-breaking apparatus for use in ships and barges operating on icy waters, including nozzles for jetting high pressure fluid, is disclosed. By impinging force or cavitation caused by the high pressure fluid jetted from the nozzles, grooves or cracks a... | 05/08/1979 |
| 4137986 | Captured air bubble arctic vehicle with ice cutters An arctic vehicle is provided for the rapid transport of goods, machinery, and personnel over ice, snow and frozen ground surfaces. The vehicle is supported partially while at rest and/or under way by a cushion of air which is entrained by a system of seals. S... | 02/06/1979 |
| 4102288 | Operations vessel for ice covered seas A mobile monopod operations platform for use in ice covered seas and adapted for carrying out two modes of ice disaggregation, either or both such modes being selectively useable during either transit or relatively stationary operations. An ice breaker bo... | 07/25/1978 |
| 4077225 | Apparatus for ice disaggregation An ice cutter movably mounted on a marine structure for cutting encroaching ice floes or ice sheets. A cutter blade is mounted on the structure so that it may be conveniently moved into a position on the structure toward which the ice is moving. Acoustica... | 03/07/1978 |
| 4070062 | Method of and apparatus for disaggregating particulate matter A cutting-chipping system comprising an interconnected triaxial array of rotating drums each mounted for independent rotation. Each drum includes a plurality of spaced, outwardly extending teeth to sequentially cut, chip and break particulate mass such as... | 01/24/1978 |
| 4069783 | Method of and apparatus for disaggregating particulate matter An ice disaggregation system comprising a multiplicity of aligned and successively longer sledging teeth outwardly extending from a rotatable drum. The drum rotation allows the successively longer teeth to sequentially cut and chip deepening grooves in va... | 01/24/1978 |
| 4022142 | Ice cutter having injection of low density fluid An ice cutting system in which a low density fluid, such as air or exhaust gas, is injected into the cutting region. The injection of the low density fluid results in a more efficient cutting operation, and also reduces the buoyancy of the ice chips resul... | 05/10/1977 |
| 4005666 | Fluid vacuum release for ice cutting systems There is described a comminuting type ice cutter for use with vessels operating in ice-covered waters. Fluid, such as water or air, is injected into the region of each cutter edge to break the partial vacuum which is created at the cleavage interface of t... | 02/01/1977 |
| 3973509 | Icebreaker vessel An icebreaker having a cantilever forecastle from which is suspended one sliding carriage or a plurality of sliding carriages. Each sliding carriage mounts one planing tool or a plurality of planing tools with increasing depth of cut, in a tandem arrangem... | 08/10/1976 |
| 3965835 | Arctic transport and marine operation system A buoyant, cylindrical metal drum, having a plurality of elongate teeth protruding outwardly from the periphery thereof is mounted for rotation about its longitudinal axis in a generally U-shaped framework. The frame is pivotally attached to the front of ... | 06/29/1976 |
