HRPK20180795B3 - Bow thruster guard - Google Patents

Abstract

The protection of the bow thruster (7) which is installed on the openings of the bow thruster tunnel (1) solves the technical problem of protecting the bow thruster (8) from damage, installation of protection without drilling and damage to the hull (9), and allows easy disassembly and assembly, for the needs of periodic service operations. It consists of a housing (3), an arm support (4), movable arms (2) with arm tips (10) and a movable conical nut (5) with a screw (6) whose movement acts on the ejection and retraction of the arms (2) in the manner that by tightening it acts to push the abutment of the arms (4) and ejects the arms (2) into the wall of the bow propeller tunnel (1) thus forming a solid connection without drilling the hull (9) or using screws and rivets, and loosening the conical nut (5) with with the screw (6), the arms (2) are retracted and the arms support (4) is released, so that the bow propeller guard (7) can be removed and replaced repeatedly without the need for mounting screws. The bow thruster guard (7) installed on the bow thruster tunnel openings (1) of the craft solves the technical problem of protecting the bow thruster (8) from damage, protecting it without drilling and damaging the hull (9), and facilitates its simple dismantling and installation, for the needs of periodic service operations. It consists of a housing (3), arms base (4), movable arms (2) with the arm tips (10) and a movable cone nut (5) with a screw (6), by moving it to eject and drag in the arms (2) in the way that by tightening it presses the arms base (4) and pulls the arms (2) out into the wall of the bow thruster tunnel (1), thus forming a firm connection without the need for drilling the hull (9) or the use of screws and rivets and by releasing the cone nut (5) with the screw (6), the arms (2) are being pulled in and the arms base (4) is being released so that the bow thruster guard (7) can be removed and placed repeatedly without the use of mounting screws.

Description

The field to which the invention relates

The invention relates to the field of shipbuilding and shipping, more precisely equipment for vessels.

Technical problem

The technical problem that is solved by this invention is how to protect the bow propeller from damage, by installing protection without drilling and damaging the vessel's hull, and at the same time enable simple disassembly and assembly of the same, for the needs of periodic service operations.

State of the art

After a personal search on the Internet (Google Patent Search, United States Patent & Trademark Office, Japan Patent Office, WIPO), I did not come across such or similar solutions that would enable, what enables the technical solution of my invention. Given that devices from the state of the art do not solve these technical problems and are not similar to my invention, this application is submitted.

Presentation of the essence of the invention

During operation, the bow propeller pulls in water from one side and expels it from the other. Along with the water come unwanted objects such as ropes, nylon bags, pieces of wood or plastic and other waste that can be found in the sea. These objects in practice damage or disable the propeller from performing its function due to contact with the bow propeller. The aim of the invention is to protect the damage of the bow propeller in such a way that the floating objects in the sea stop the way towards the bow propeller. During the approach to the marina and the use of the bow propeller, and in the vast majority of cases, it happens that the bow propeller pulls the rope that is in the sea, causing damage to the bow propeller.

During the regular annual service of the vessel, or in the event of a breakdown, it is necessary to dismantle the protection of the bow propeller in order to allow access to the bow propeller. Standard protections are attached to the hull of the barge with screws, which wear out the threads in the hull of the vessel during several unscrewing and screwing operations and can no longer perform their function, but it is necessary to repair the old holes and make new ones. This invention enables its assembly without screws and drilling holes in the vessel's hull. Installation of the propeller protection is possible while the vessel is at sea or on land, it is easy to assemble and disassemble. No special tools are required for assembly of the invention.

The invention can be assembled and disassembled countless times without any damage to the vessel's hull, unlike existing solutions where the protection of the bow propeller is attached with screws. During many years of work on vessels, he saw the problem of a large number of damaged bow propellers, and the idea for this invention came from this.

A short list of drawings

FIG. 1. shows a frontal view of the bow propeller protection

FIG. 2. shows a section of the components of the propeller protection in the open position

FIG. 3 shows a front view of the propeller guard in the released (open) position

FIG. 4 shows a front view of the propeller guard in the clamped (attached) position

FIG. 5. shows a cross-section of the vessel's hull with the bow propeller tunnel, the bow propeller and the bow propeller guards on both sides

List of used callsigns

1 Bow propeller tunnel

2 arm

3 housing

4 arm support

5 conical nut

6 screws

7 bow propeller protection

8 bow propeller

9 the hull of the vessel

10 tip of the arm

11 protective mesh

A detailed description of at least one way of realizing the invention

The bow propeller protection 7 is installed on the bow tunnel openings without drilling the hull of the vessel 9, i.e. without screws or rivets. It consists of a housing 3 that contains all the elements, namely the arm supports 4 to which the arms 2 with rubber or silicone arm tips 10 and the conical nut 5 with the screw 6 are attached (FIG. 2). By tightening or loosening the screw 6, the conical nut 5 moves, which, due to the movement of the cone, through the support of the arms 4, acts to eject the arms 2 with rubber or silicone tips of the arm 10. The supports of the arms 4 are also conical in shape so that they follow the slope of the conical nut 5. When tightening the screws 6, the conical nut 5 moves and transmits force to the fulcrums of the arm 4 and thus pushes the arms 2 in a vertical direction towards the surface of the tunnel of the bow propeller 1. When the arms 2 are sufficiently pushed into the tunnel of the bow propeller 1 and the contact of the surface of the tunnel of the bow propeller 1 with the tips arm 10 achieved, the protection of the bow propeller 7 is fixed (FIG. 4).

The procedure for removing the protection of the bow propeller 7 is reversed, that is, the protection is removed in such a way that the conical nut 5 with the screw 6 is loosened, which acts on the arms 2 so that it will retract, that is, release the contact surface of the tunnel of the bow propeller 1 and the tips of the arms 10, so then the protection with retracted arms 2 (FIG. 3) can be removed and the bow propeller 8, located inside the bow propeller tunnel 1 (FIG. 5), can be accessed without hindrance.

When applying the invention to larger vessels, where the dimensions of the tunnel of the bow propeller 1 are larger, the dimensions of the distance between the arms 2 of the protection of the bow propeller 7 automatically increase, through which smaller pieces of waste could pass, so in this case a protective mesh is added to the arms 2 11 (FIG. 6), which prevents the passage of even the smallest pieces of waste and thus additionally protects the bow propeller 8 from possible damage.

The best way to apply the invention

This device is intended for all types of vessels. The device is suitable for quick installation and does not require any additional devices or special installations. It is suitable for installation in new vessels or as an upgrade of existing systems. The invention enables a practical, useful and durable device, which is technically easy to perform, and represents significant improvements compared to previously known solutions. It is made of durable, strong, waterproof materials that are common in the manufacture of equipment for boats and meet the necessary standards. It will be apparent to experts that it is possible to apply various construction variants and designs of this device, such as adding a certain number of arms, or adding a protective mesh for the purpose of better protection, but without leaving the scope and spirit of the invention.

Claims (3)

1. Protection of the bow propeller, which is installed on the openings of the bow tunnel of the vessel, characterized by the fact that it consists of a housing (3), arm supports (4), movable arms (2) with arm tips (10) and a movable conical nut (5) with a screw (6) with the movement of which we act to eject and retract the arms (2) in order to attach and remove the bow propeller protection (7) to the bow propeller tunnel (1) in order to protect the bow propeller (8). 2. Protection of the bow propeller, according to claim 1, indicated by the fact that the solid connection of the protection of the bow propeller (7) with the wall of the tunnel of the bow propeller (1) is realized through the arms (2) with the tips of the arms (10), by the action of the conical nut (5) with with a screw (6), which, by tightening, acts to push the support of the arms (4) and pushes the arms (2) into the wall of the bow propeller tunnel (1), thus forming a solid connection without the need to drill the vessel's hull (9) or use screws and rivets. 3. Protection of the bow propeller, according to requirements 1 and 2, characterized by the fact that the dismantling of the protection of the bow propeller (7) is achieved by loosening the conical nut (5) with the screw (6), which releases the supports of the arms (4) and retracts the arms (2), which the protection of the bow propeller (7) loses contact with the wall of the bow propeller tunnel (1), and is used, removed and put on, repeatedly, without the need to use mounting screws.