DESC:This application claims priority from provisional patent application number 202321016729 titled “Lifting tool for Submarine Shaft Line Nut” filed on 13/03/2023.
FIELD OF DISCLOSURE
[0001] The present invention relates generally to tools used in marine engineering, and more specifically, to a lifting tool designed for the efficient and safe removal and installation of nuts associated with submarine shaft lines.

BACKGROUND OF THE DISCLOSURE
[0002] Submarine shaft lines typically involve intricate and critical components, including nuts that require periodic maintenance, inspection, or replacement. The current methods for handling these nuts during maintenance operations can be time-consuming, labour-intensive, and may pose safety risks.
[0003] In the maritime industry, dock gate operations involve the precise control of water levels within dock facilities, ensuring safe passage for vessels. This process often necessitates the manipulation of large valves and gates, which traditionally rely on manual labour. The invention offers an automated drive system that simplifies and streamlines these operations, reducing the time and effort required for opening and closing valves in dock gate systems. By doing so, it enhances efficiency and minimizes the margin of error associated with manual control.
[0004] Conventional submarine shaft line maintenance and repair procedures involve intricate tasks such as the removal and replacement of nuts securing various components. Existing tools for these tasks are often cumbersome, lack precision, and may pose challenges in the confined spaces of a submarine environment. Traditional tools may require extensive disassembly or complex manoeuvres, leading to increased downtime and operational inefficiencies.
[0005] The nut being a heavy object and working at heights, this activity becomes risky for both man and job. Also, the nut being a special and expensive one, the same needs to be man handled with utmost care.
SUMMARY OF THE DISCLOSURE
[0006] The following is a summary description of illustrative embodiments of the invention. It is provided as a preface to assist those skilled in the art to more rapidly assimilate the detailed design discussion which ensues and is not intended in any way to limit the scope of the claims which are appended hereto in order to particularly point out the invention.
[0007] According to illustrative embodiments, the present invention addresses the challenges associated with submarine shaft line nut maintenance by providing a lifting tool designed for secure and controlled handling of these nuts. The tool ensures efficient removal and installation while minimizing the risk of damage to the nuts or surrounding components.
[0008] An objective of the present invention is to allow users to access confined or distant areas that would be otherwise challenging to reach.
[0009] Users can accomplish tasks more efficiently, potentially reducing the time and effort required for certain applications.
[0010] The lifting tool boasts a precision-engineered design, allowing for accurate and controlled handling of submarine shaft line nuts. This design minimizes the risk of damage during removal and installation procedures.
[0011] Unlike traditional tools, our lifting tool is optimized for manoeuvrability in the confined spaces of a submarine. This ensures access to nuts in tight spaces without the need for extensive disassembly of surrounding components.
[0012] The innovative design of the tool streamlines maintenance processes, significantly reducing downtime associated with the removal and installation of submarine shaft line nuts. This time efficiency contributes to improved overall operational availability.
[0013] The lifting tool is constructed with the unique challenges of a submarine environment in mind. It is durable, corrosion-resistant, and capable of withstanding the harsh conditions commonly encountered in underwater applications.
[0014] By simplifying and expediting maintenance procedures, the lifting tool enhances the operational efficiency of submarine propulsion systems.
[0015] The precision and adaptability of the tool minimize the risk of damage to nuts and associated components, ensuring the longevity and reliability of the submarine shaft lines.
[0016] The time savings and reduced need for extensive disassembly contribute to cost-effective submarine maintenance, providing a tangible economic benefit.
[0017] In light of the above, in one aspect of the present disclosure, a lifting tool for a submarine shaft line nut is disclosed. The lifting tool includes an MS structural frame (body) configured to provide structural support and stability to the lifting tool during operation. The lifting tool further includes a stud attached to the MS structural frame, serving as a connection point for other components and facilitating the lifting operation. The lifting tool further includes an eye bolt affixed to the stud, enabling secure attachment to the submarine shaft line nut for lifting purposes. The lifting tool further includes a locking nut threadedly engaged with the stud to secure the eye bolt in a fixed position during operation. The lifting tool further includes a holding piece strategically positioned on the MS structural frame to support and stabilize the lifting tool during the lifting process. The lifting tool further includes two rollers mounted on the MS structural frame, facilitating smooth movement and manoeuvrability of the lifting tool within the confined spaces of a submarine environment.
[0018] These and other advantages will be apparent from the present application of the embodiments described herein.
[0019] The preceding is a simplified summary to provide an understanding of some embodiments of the present invention. This summary is neither an extensive nor exhaustive overview of the present invention and its various embodiments. The summary presents selected concepts of the embodiments of the present invention in a simplified form as an introduction to the more detailed description presented below. As will be appreciated, other embodiments of the present invention are possible utilizing, alone or in combination, one or more of the features set forth above or described in detail below.
[0020] These elements, together with the other aspects of the present disclosure and various features are pointed out with particularity in the claims annexed hereto and form a part of the present disclosure. For a better understanding of the present disclosure, its operating advantages, and the specified object attained by its uses, reference should be made to the accompanying drawings and descriptive matter in which there are illustrated exemplary embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS
[0021] To describe the technical solutions in the embodiments of the present disclosure or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description merely show some embodiments of the present disclosure, and a person of ordinary skill in the art can derive other implementations from these accompanying drawings without creative efforts. All of the embodiments or the implementations shall fall within the protection scope of the present disclosure.
[0022] The advantages and features of the present disclosure will become better understood with reference to the following detailed description taken in conjunction with the accompanying drawing, in which:
[0023] FIG. 1 illustrates a side view of a lifting tool for a submarine shaft line nut, in accordance with an exemplary embodiment of the present disclosure disclosed herein;
[0024] FIG. 2 illustrates a perspective view of a lifting tool for a submarine shaft line nut, in accordance with an exemplary embodiment of the present disclosure disclosed herein.
[0025] Like reference, numerals refer to like parts throughout the description of several views of the drawing.
[0026] The lifting tool for various sizes of elbow pipes for clamping on lathe machine is illustrated in the accompanying drawings, which like reference letters indicate corresponding parts in the various figures. It should be noted that the accompanying figure is intended to present illustrations of exemplary embodiments of the present disclosure. This figure is not intended to limit the scope of the present disclosure. It should also be noted that the accompanying figure is not necessarily drawn to scale.
DETAILED DESCRIPTION OF THE DISCLOSURE
[0027] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure.
[0028] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be apparent to one skilled in the art that embodiments of the present disclosure may be practiced without some of these specific details.
[0029] Various terms as used herein are shown below. To the extent a term is used, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0030] The terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items.
[0031] The terms “having”, “comprising”, “including”, and variations thereof signify the presence of a component.
[0032] Referring now to FIG. 1 to FIG. 2 to describe various exemplary embodiments of the present disclosure.
[0033] The lifting tool comprises a robust MS (Mild Steel) structural frame, serving as the primary body. The frame is designed to provide structural integrity and support for the various components of the lifting tool. It is configured with precision to accommodate the unique dimensions and requirements of submarine shaft line nuts. The MS structural frame ensures durability and corrosion resistance, essential for reliable operation in the challenging marine environment.
[0034] The MS structural frame includes a protective coating to resist corrosion and enhance durability in the harsh submarine environment.
[0035] The lifting tool (100) includes an MS structural frame (body) configured to provide structural support and stability to the lifting tool during operation. The MS structural frame is constructed from a corrosion-resistant material suitable for underwater applications, ensuring durability in submarine environments.
[0036] The lifting tool (100) further includes a stud attached to the MS structural frame, serving as a connection point for other components and facilitating the lifting operation.
[0037] The lifting tool (100) further includes an eye bolt affixed to the stud, enabling secure attachment to the submarine shaft line nut for lifting purposes. The eye bolt includes a load distribution feature to evenly distribute forces during lifting, preventing localized stress and potential damage to the submarine shaft line nut.
[0038] The lifting tool (100) further includes a locking nut threadedly engaged with the stud to secure the eye bolt in a fixed position during operation. The lifting tool (100) further includes a holding piece strategically positioned on the MS structural frame to support and stabilize the lifting tool during the lifting process. The holding piece is adjustable to accommodate variations in the size and shape of submarine shaft line nuts, providing versatility in the lifting operation.
[0039] Further, the locking nut comprises a quick-release mechanism for efficient and rapid securing and releasing of the eye bolt. The eye bolt includes an anti-rotation feature to prevent undesired movement during the lifting operation.
[0040] The lifting tool (100) further includes two rollers mounted on the MS structural frame, facilitating smooth movement and manoeuvrability of the lifting tool within the confined spaces of a submarine environment. The rollers are designed with a low-friction surface to minimize resistance during movement and enhance the tool's manoeuvrability within the submarine shaft line environment.
[0041] Additionally, the two rollers are positioned at opposite ends of the MS structural frame to optimize stability and balance during the lifting operation.
[0042] Integrated into the MS structural frame are one or more threaded studs. The studs are strategically positioned to engage with the threaded portion of the submarine shaft line nut. The threading on the studs is compatible with the corresponding threading on the nuts, facilitating a secure and precise connection during the lifting and manoeuvring operations.
[0043] The lifting tool features an eye bolt that is securely attached to the MS structural frame. The eye bolt provides a point of attachment for lifting equipment, such as a crane or other hoisting mechanisms. Its design ensures a reliable connection, distributing the lifting forces evenly to prevent stress concentrations on the tool or the submarine shaft line nut.
[0044] A handle attached to the MS structural frame, providing a gripping point for manual handling and positioning of the lifting tool.
[0045] The threaded stud extends through a locking nut, which serves a dual purpose. Firstly, it allows for the fine adjustment of the lifting tool's height to accommodate different sizes of submarine shaft line nuts. Secondly, once the optimal height is achieved, the locking nut ensures the stud remains securely in place during the lifting and manoeuvring processes, preventing unintentional adjustments and enhancing the overall stability of the lifting tool.
[0046] A holding piece is strategically positioned on the MS structural frame to provide additional support and stabilization during the lifting operation. This component helps distribute the load evenly, preventing tilting or misalignment of the lifting tool while engaged with the submarine shaft line nut. The holding piece is designed to complement the contours of the submarine shaft line nut, ensuring a secure and balanced grip.
[0047] The lifting tool is equipped with two rollers positioned on either side of the MS structural frame. These rollers facilitate smooth movement and rotation of the lifting tool around the submarine shaft line nut. The rollers are strategically placed to minimize friction during the lifting and manoeuvring processes, allowing for precise positioning and alignment of the lifting tool with the nut.
[0048] In combination, the MS structural frame, stud, eye bolt, locking nut, holding piece, and rollers create a lifting tool that is not only durable and adaptable but also facilitates efficient and precise operations in the maintenance and repair of submarine shaft line nuts.
[0049] FIG. 1 provides a general overview of the lifting tool for Submarine Shaft Line Nut. The tool comprises a robust MS Structural Frame (Body) designed to withstand the demands of submarine maintenance operations. The various components, including Stud, Eye Bolt, Locking Nut, Holding Piece, and Rollers, are positioned to showcase their spatial relationships within the overall assembly;
[0050] The frame serves as the primary support structure for the lifting tool, providing stability and durability during the lifting and manoeuvring processes;
[0051] The Stud and Eye Bolt configuration is illustrated, demonstrating their interconnected design. The Stud acts as a connecting element between the MS Structural Frame and the Eye Bolt, ensuring a secure attachment that facilitates controlled lifting of submarine shaft line nuts.
[0052] The Locking Nut secures the Holding Piece in place, forming a crucial part of the tool's precision mechanism. This assembly allows for controlled and stable engagement with the submarine shaft line nuts during removal and installation procedures;
[0053] The two rollers integrated into the lifting tool. These rollers are strategically positioned to enhance manoeuvrability within confined spaces, providing smooth and controlled movement during operations. The rollers contribute to the tool's adaptability in the unique environment of submarine propulsion systems.
[0054] The MS Structural Frame (Body) provides a stable foundation, while the Stud, Eye Bolt, Locking Nut, Holding Piece, and Rollers collaborate to efficiently lift and handle submarine shaft line nuts with precision and ease
[0055] While the invention has been described in connection with what is presently considered to be the most practical and various embodiments, it will be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
[0056] A person of ordinary skill in the art may be aware that, in combination with the examples described in the embodiments disclosed in this specification, units and algorithm steps may be implemented by electronic hardware, computer software, or a combination thereof.
[0057] The foregoing descriptions of specific embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described to best explain the principles of the present disclosure and its practical application, and to thereby enable others skilled in the art to best utilize the present disclosure and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but such omissions and substitutions are intended to cover the application or implementation without departing from the scope of the present disclosure.
[0058] Disjunctive language such as the phrase “at least one of X, Y, Z,” unless specifically stated otherwise, is otherwise understood with the context as used in general to present that an item, term, etc., may be either X, Y, or Z, or any combination thereof (e.g., X, Y, and/or Z). Thus, such disjunctive language is not generally intended to, and should not, imply that certain embodiments require at least one of X, at least one of Y, or at least one of Z to each be present.
[0059] In a case that no conflict occurs, the embodiments in the present disclosure and the features in the embodiments may be mutually combined. The foregoing descriptions are merely specific implementations of the present disclosure, but are not intended to limit the protection scope of the present disclosure. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present disclosure shall fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
,CLAIMS:I/We claim:
1. A lifting tool (100) for a submarine shaft line nut, the lifting tool (100) comprising:
an MS structural frame (body) configured to provide structural support and stability to the lifting tool during operation;
a stud attached to the MS structural frame, serving as a connection point for other components and facilitating the lifting operation;
an eye bolt affixed to the stud, enabling secure attachment to the submarine shaft line nut for lifting purposes;
a locking nut threadedly engaged with the stud to secure the eye bolt in a fixed position during operation;
a holding piece strategically positioned on the MS structural frame to support and stabilize the lifting tool during the lifting process; and
two rollers mounted on the MS structural frame, facilitating smooth movement and manoeuvrability of the lifting tool within the confined spaces of a submarine environment.
2. The lifting tool (100) as claimed in claim 1, wherein the MS structural frame is constructed from a corrosion-resistant material suitable for underwater applications, ensuring durability in submarine environments.
3. The lifting tool (100) claimed in claim 1, wherein the rollers are designed with a low-friction surface to minimize resistance during movement and enhance the tool's manoeuvrability within the submarine shaft line environment.
4. The lifting tool (100) claimed in claim 1, wherein the holding piece is adjustable to accommodate variations in the size and shape of submarine shaft line nuts, providing versatility in the lifting operation.
5. The lifting tool (100) claimed in claim 1, wherein the eye bolt includes a load distribution feature to evenly distribute forces during lifting, preventing localized stress and potential damage to the submarine shaft line nut.
6. The lifting tool (100) claimed in claim 1, further comprising a handle attached to the MS structural frame, providing a gripping point for manual handling and positioning of the lifting tool.
7. The lifting tool (100) claimed in claim 1, wherein the two rollers are positioned at opposite ends of the MS structural frame to optimize stability and balance during the lifting operation.
8. The lifting tool (100) claimed in claim 1, wherein the MS structural frame includes a protective coating to resist corrosion and enhance durability in the harsh submarine environment.
9. The lifting tool (100) claimed in claim 1, wherein the locking nut comprises a quick-release mechanism for efficient and rapid securing and releasing of the eye bolt.
10. The lifting tool (100) claimed in claim 1, wherein the eye bolt includes an anti-rotation feature to prevent undesired movement during the lifting operation.