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| Number | Title | Issue Date |
| 7405999 | Sensor module for trawl The invention relates to a module (100) which is attached to a trawl, and which at least comprises measuring sensors (330) and a power supply unit. (320) The sensors are basically inactive, but can be activated as the need arises to measure diff... | 07/29/2008 |
| 7367153 | Collapsible planar board The planar board disclosed features a convexo-concave board characteristic that allows the boards to channel the water creating a water rail for smoother more controlled performance. The planar board also features one removable cross member end that allows for colla... | 05/06/2008 |
| 6138397 | Method and device for operation of a trawl There is referred to a process and an arrangement for control of one or more trawls (12, 40, 42) which are towed after a vessel (10), where the trawl(s) (12, 40, 42) are connected to the vessel by means of a number of cables (16, 14; 44, 45, 46), and wher... | 10/31/2000 |
| 6131327 | Otter board The invention relates to an otter board (20) which may be used for generating a spreading force in connection with trawl fishing. The otter board according to the invention comprises at least two foils (1-3) which are suspended between a number of longitu... | 10/17/2000 |
| 5444933 | Trawl fishing gear and trawl fishing method Trawl fishing gear characterized by providing net-mouth expanding bodies at respective predetermined positions near or upstream of upstream ends of respective wing portions of the trawl net. This adjusts the angle and/or surface area of the net-mouth expa... | 08/29/1995 |
| 5341591 | Planer board A trolling assembly, adapted to be connected to a fishing boat by a tow line so that the assembly is drawn behind the boat and laterally to the course of the boat allowing a plurality of trolling fishing lines from the boat to be connected to spaced point... | 08/30/1994 |
| 5283972 | Otter board A towable Otter Board having upstream facing flap portions is disclosed for use in trawl fishing applications. The flap portions are used to divert fluid flow from the concave lower board surface to the upper convex board surface which serves to shift a v... | 02/08/1994 |
| 5267408 | Otter board An otter board, the net-mouth expanding force of which can be freely adjusted corresponding to the fishing style. The otter board according to the invention is charactrized in that, said otter board having biplane otter board members, an outer board membe... | 12/07/1993 |
| 5265367 | Otter board Otter board which is provided with a means for adjusting net-mouth expanding force which can be driven by liftingrope thereby to freely vary said force. According to the first embodiment of the invention, said otter board is formed by biplane construction... | 11/30/1993 |
| 5201137 | Hydrodynamic trawl opening device A hydrodynamic trawl opening device is disclosed consisting of a structure 11) with at least two flexible superimposed wings (12, 13), joined together by a plurality of flexible dividing walls (14) which are transverse with respect to said wings. Fixing me... | 04/13/1993 |
| 5193300 | Tripanel hydrodynamic depressor for fishing lines The plate body of a hydrodynamic depressor is composed of a flat central panel flanked along its opposite longitudinal edges by side panels disposed at dihedral angles to the central panel. The central panel carries a guide rod extending fore and aft alon... | 03/16/1993 |
| 5105572 | Construction of and technique for fastening wear shoes to a trawl door A wear shoe apparatus for protecting the bottom of a trawl door used to open a trawl being pulled behind a fishing boat. A lower wear shoe is provided with a bottom and two walls extending upward therefrom to define a channel sized to accommodate therein ... | 04/21/1992 |
| 4894946 | Otter board An otter board comprising a front board member and rear board member. The rear board member is connected to the front board member through variable connecting mechanism, so that the relative positions of both the front and rear board members may be freely... | 01/23/1990 |
| 4879830 | Trawl door A trawl door is disclosed including a V-shaped member having two louvers and a three point tow cable attachment system. One louver is located on each side of the central longitudinal axis and includes a slat extending into an obtuse included angle of the ... | 11/14/1989 |
| 4653213 | Low resistance net-supporting frame assembly An end door for a trawling net has an open framework for clearance of debris and panel structure secured to the framework therebehind for providing the required resistance to keep the mouth of the net open while the trawl is under tow in fishing waters. T... | 03/31/1987 |
| 4640037 | Trawl doors A member (3) is pivotally mounted on the inner face of a trawl door 1, and said member can be attached to a trawl warp which is attached to a trawler. A resilient connection (12) is provided between the member and a point on the inner face of the trawl do... | 02/03/1987 |
| 4597214 | Trawling apparatus Trawling apparatus, including otterboards, sleds and mid-water boards (47) have transverse slats (50,54) fixed to a frame, has uprights (48) and a shoe. The apparatus is towed via a towing yoke (49) attached to a towing cable. The slats (50,54) have uprig... | 07/01/1986 |
| 4344247 | Otterboard An otterboard and a method of manufacturing an otterboard are disclosed wherein the otterboard is comprised of a plate member, a shoe member and a sole plate. The shoe member is formed of a tough wear resistant material and attached to a bottom side of th... | 08/17/1982 |
| 4180935 | Hydrofoil trawl door A hydrodynamically superior trawl door with increased efficiency in harvesting fish and reducing fuel expenditures is composed of curved steel panels, which may be of constant radius to allow for economy in manufacturing. The door approximates an ideal hy... | 01/01/1980 |
| 4045901 | Trawler doors A cooperating pair of trawler doors is disclosed wherein each door comprises a longitudinally arcuate body with a convex inner side and a concave outer side, at least one louver in the body providing slots for passage of water through the doors, first att... | 09/06/1977 |
