US3205845A

US3205845A - Trawler

Info

Publication number: US3205845A
Application number: US339273A
Authority: US
Inventors: Jan A Baron Van Slingelandt
Original assignee: SCHEEPSBOUWWERF Gebr POT NV
Current assignee: N V Scheepsbouwwerf Gebr Pot; SCHEEPSBOUWWERF Gebr POT NV
Priority date: 1964-01-21
Filing date: 1964-01-21
Publication date: 1965-09-14
Anticipated expiration: 1982-09-14

Description

Se t. 14, 1965 J. A. BARON VAN SLINGELANDT 3,205,345

TRAWLER Filed Jan. 21. 1964 3i J 3h 5 U8 0 INVENTOR:

JAN A.B.4RoN VAN Sunazmmor ATToRlIEYS United States Patent Ofiice 3,205,845 Patented Sept. 14, 1965 3,205,845 TRAWLER Jan A. baron van Slingelandt, Rotterdam, Netherlands, assignor to N.V. Scheepsbouwwerf Gebr. Pot, Bolnes, Netherlands, a limited-liability company of the Netherlands Filed Jan. 21, 1964, Ser. No. 339,273 2 Claims. (Cl. 114-5) The invention relates to a trawler with a hull structure in the stern post which forms a ramp in the net handling position for paying out and handling the fishing net.

A trawler of this kind is generally known. However, it could be dangerous that at sea waves and, especially, incoming waves at the stern can reach the deck over the ramp and flow from there via opened hatches into the tween deck, with all the inherent dangers. Moreover, the crew members can get into the water via the ramp, since the bulwarks is interrupted at the top of this ramp. Besides, the propellor and the rudder are left unprotected by this structure, in consequence whereof one is running the risk during handling the net, that the net may get entangled with the propellor, this eventually causing the net becoming severely damaged and the catch is lost; whereby the steering of the ship then becomes impossible.

It is an object of the invention to provide a trawler which is free from the above-mentioned disadvantages not requiring any intricate mechanisms.

This is attained according to the invention in that the hull structure has movably been connected with the stern post and is provided with a motion mechanism for the displacement between the net handling position and a sailing position, in which sailing position the movable hull structure is flush with the stern post of the main hull.

As a consequence of this it is attained that the movable hull structure is only lowered during the net handling, so during the paying out and the hauling of the fishing net by means of a motion mechanism and forms the proper ramp. Immediately after the net handling the movable hull structure is again brought into its highest position and is therein flush with the stern post of the main hull. In this sailing position the high, incoming waves at the stern cannot come inboard anymore, whereas also the crew cannot get into the water via the pump.

According to preferred embodiment of the invention the movable hull structure is at least provided with a substantially fiat part, which at the inboard end has been connected by means of hinges to the main deck of the stern post, and forms the proper ramp in the net handling position and a part of the upper deck in the sailing position, and is flush therewith. Furthermore the substantially flat part of the movable hull structure can have at the outboard end of the bottom side an apron with a hem which are in the sailing position flush with the transom and possibly with an overlap with the bottom of the stern part of the trawler. Moreover, this apron and hem can be placed under the water line in the net handling position and be placed, viewed from the stern part, in front of the rudder and the propellor. By application of these measures is attained in a simple way that the rudder and the propellor are well protected against getting fouled by the net, whilst the net in its turn does not run the risk of being damaged by the propellor and the rudder.

The invention will now be explaned with the aid of the accompanying drawing of a preferred embodiment.

FIGURE 1 is a schematic longitudinal section of the stern post of a trawler according to the invention.

FIGURE 2 is a schematic plan view of the trawler according to FIGURE 1.

According to the drawing a movable hull structure has been applied in the stern post of a trawler, said structure consisting of a substantially flat part 1 and an apron 2 which has a hem 6 at the bottom side. This hull structure is movably connected by means of the hinges 3 to the main deck. During the free sailing and the towing of the net the movable hull structure is fixed in the highest, thus in the sailing position, part 1 being flush with the main deck 4, the apron 2 with the transom 5 and the hem 6, possibly with an overlap, with the bottom side of the stern 7 of the ship.

For the handling of the net the hull structure is turned on the hinges 3 until part 1 forms the ramp, over which the net can be hauled inboard or can be payed out. In this net handling position the apron 2 and the hem 6 thereof lie under the water line behind the rudder 8 and the propeller 12, and thus cover at least a part of these elements without contacting them. Accordingly, the rudder 8 and propeller 12 are not only effectively protected from being fouled by the net but their freedom of movement is not hampered.

The motion mechanism for the hull structure consists of a steel wire or cable 9 attached to port and starboard, which runs each via a guide roll 10 to a winch 11 on deck, with which the steel wires can be eased off and drawn in respectively. Also other motion mechanisms are possible for this purpose, as for instance a screw rod or other movement apparatus.

The part of the stern post in which the movable hull structure has been applied, is completely watertight separated from the remaining part of the ship. Therefore the movable hull structure and this part of the main hull can possibly be made accessible for water which facilitates the movement of the hull structure.

What is claimed is:

1. In a trawler having a main deck, rudder, propeller, stern, port and starboard transoms the improvement comprising a movable hull structure disposed at the stern of said trawler and having a stem end, a forward end, a fiat portion, an apron and a hem at the bottom of said hull structure, pivot means secured to said deck and hull structure for connecting said hull structure at its forward end to said main deck, and power means including a cable connected to said hull structure forward of said transom for raising and lowering the stern end of the hull structure, said movable hull structure when in the lowered position being below the water line and serving to protect the rudder and propeller against fouling as a net is hauled over the apron and into the trawler and when in the raised position the flat part is flush with said main deck.

2. In a trawler having a main deck, rudder, propeller, stern, port and starboard transoms the improvement comprising a movable hull structure disposed at the stern of said trawler between said transoms and having a stern end, a forward end, a flat portion, an apron and a hem at the bottom of said hull structure, pivot means secured to said deck and hull structure for connecting said hull structure at its forward end to said main deck, and power means including a cable connected to said hull structure forward of said transom for raising and lowering the stem end of the hull structure, said movable hull structure when in the lowered position being below the water line and serving to protect the rudder and propeller against fouling as a net is hauled over the apron and into the trawler and when in the raised position the flat part is flush with said main deck.

References Cited by the Examiner UNITED STATES PATENTS 893,642 7/08 Morch 114-435 X 1,811,321 6/31 Kiwull 114-435 FOREIGN PATENTS 632,420 11/49 Great Britain. 810,344 3/59 Great Britain.

1,127,736 4/62 Germany.

MILTON BUCHLER, Primary Examiner.

FERGUS S. MIDDLETON, Examiner.

Claims

1. IN A TRAWLER HAVING A MAIN DECK, RUDDER, PROPELLER, STERN, PORT AND STARBOARD TRANSOMS THE IMPROVEMENT COMPRISING A MOVABLE HULL STRUCTURE DISPOSED AT THE STERN OF SAID TRAWLER AND HAVING A STERN END, A FORWARD END, A FLAT PORTION, AN APRON AND A HEM AT THE BOTTOM OF SAID HULL STRUCTURE, PIVOT MEANS SECURED TO SAID DECK AND HULL STRUCTURE FOR CONECTING SAID HULL STRUCTURE AT ITS FORWARD END TO SAID MAIN DECK, AND POWER MEANS INCLUDING A CABLE CONNECTED TO SAID HULL STRUCTURE FORWARD OF SAID TRANSOM FOR RAISING AND LOWERING THE STERN END OF THE HULL STRUCTURE, SAID MOVABLE HULL STRUCTURE WHEN IN THE LOWERED POSITION BEING BELOW THE WATER LINE AND SERVING TO PROTECT THE RUDDER AND PROPELLER AGAINST FOULING AS A NET IS HAULED OVER THE APRON AND INTO THE TRAWLER AND WHEN IN THE RAISED POSITION THE FLAT PART IS FLUSH WITH SAID MAIN DECK.