DESC:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
A LIFTING ARRANGEMENT FOR LIFTING A SINGLE POINT LOAD USING A DUAL THROAT HOOK

Applicant:
Mazagon Dock Shipbuilders Limited
A company Incorporated in India under the Companies Act, 1956
Under Ministry of Defence,
(A Govt. of India Undertaking)
Having address:
Dockyard Road, Mazagon,
Mumbai - 400010, Maharashtra, India

The following specification particularly describes the invention and the manner in which it is to be performed.

CROSS-REFERENCE TO RELATED APPLICATION AND PRIORITY
[001] The present application claims priority from Indian Patent application no. (201821041651) filed on 02nd November, 2018.

TECHNICAL FIELD
[002] The present subject matter described herein generally relates to a lifting arrangement for lifting a single point load using a dual throat hook.

BACKGROUND
[003] Typically, Ramshorn hooks (dual throat hook) and C-type hooks are used for lifting objects by means of a crane using a single point lifting. Ramshorn hook is a shank hook with two throats opening, also called as a double hook, twin hook or dual throat hook. Ramshorn hooks are mostly used for heavy lifting purposes such as high capacity cranes used in shipyards and heavy engineering industries. Since the Ramshorn hook have two throats, it becomes unsuitable for lifting objects by single point lifting and generally requires multiple slings for lifting the objects. For the single point lifting using Ramshorn Hook one needs to use two slings of equal capacity. Thus, C-type hooks are found more efficient in used in such situations. Further, it has been observed that while lifting cylindrical objects using slings in basket configuration, the Ramshorn hook generates undue stresses at the splicing of eye-eye slings as well as on endless cylindrical slings.

SUMMARY
[004] Before the present apparatus is described, it is to be understood that this application is not limited to the particular machine or apparatus, as there can be multiple possible embodiments that are not expressly illustrated in the present disclosures. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only and is not intended to limit the scope of the present application. This summary is provided to introduce aspects related to a lifting arrangement for lifting a single point load using a dual throat hook, and the aspects are further elaborated below in the detailed description. This summary is not intended to identify essential features of the proposed subject matter nor is it intended for use in determining or limiting the scope of the proposed subject matter.
[005] The present subject matter describes a lifting arrangement for lifting a single point load using a dual throat hook. The lifting arrangement may comprise one or more plates. The one or more plates may further comprise at least three pinholes. The lifting arrangement may further comprise at least three pins, removably connected in the at least three pinholes, for facilitating connection of a dual throat hook with the one or more plates. Diameter of the at least two adjacent pins of the at least three pins may be proportionate with circumference of throats of the dual throat hook in order to facilitate gripping of the dual throat hook with the at least two adjacent pins. Further, the at least one pin of the at least three pins may be situated at vertically opposite direction from the at least two adjacent pins and is capable of receiving a sling connected with the single point load thereby enabling reception of the single point load using the dual throat hook.

BRIEF DESCRIPTION OF THE DRAWINGS
[006] The foregoing summary, as well as the following detailed description of embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure, however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawing.
[007] The detailed description is described with reference to the accompanying figures. In the figure, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawing to refer like features and components.
[008] Figure 1 illustrates a various part of the lifting arrangement 100, in accordance with an embodiment of the present subject matter.
[009] Figure 2 illustrates a front view 202, a rear view 204 and a side view 206 of the lifting arrangement 100, in accordance with an embodiment of the present subject matter.
[0010] Figure 3 illustrates an internal connection of the lifting arrangement 100, in accordance with an embodiment of the present subject matter.
[0011] Figure 4 illustrates a use of the lifting arrangement 100 to lift a beam connection 402, in accordance with an embodiment of the present subject matter.
[0012] The figure depicts various embodiments of the present disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the lifting arrangement illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION
[0013] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising", “having”, and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any apparatuses and methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, apparatuses and methods are now described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0014] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated, but is to be accorded the widest scope consistent with the principles and features described herein.
[0015] As described above, ramshorn hooks (may also be interchangeably referred to as a dual throat hook, hereinafter) is a shank hook with two throats opening, also called as a double hook, twin hook or dual throat hook. Ramshorn hooks are mostly used for heavy lifting purposes such as high capacity cranes used in shipyards and heavy engineering industries. Since the ramshorn hook have two throats, it becomes unsuitable for lifting objects by single point lifting. When the load having the single point lifting is lifted using the ramshorn hook, it becomes completely imbalanced and thus risk for any mishappening increases. Therefore, in such cases, it is necessary to use multiple slings for lifting the objects which further incur excessive consumption of resources and excessive maintenance cost. Further, it has been observed that while lifting cylindrical objects using slings in basket configuration, the Ramshorn hook generates undue stresses at the splicing of slings (an eye-eye slings as well as an endless cylindrical slings). Due to undue stress on the sling while lifting the load, life and durability of the sling decreases.
[0016] The present subject matter relates to a lifting arrangement for lifting a single point load using a dual throat hook. The lifting arrangement may comprise one or more plates. Each of the one or more plates may further comprise at least three pinholes. The lifting arrangement may further comprise at least three pins, removably connected in the at least three pinholes, for facilitating connection of a dual throat hook with the one or more plates. The at least three pins may be attached on the each of the one or more plates in such a way that at least two pins may be situated adjacent to each other and at least one pin may be situated at vertically opposite direction with respect to the at least two adjacent pins, thereby forming a triangular shape.
[0017] Further, diameter of the at least two adjacent pins may be proportional to the circumference of throats of the dual throat hook. Due to this, the tight and firm gripping of the dual throat hook with the at least two adjacent pins is ensured. Further, the at least one pin which is situated at vertically opposite direction from the at least two adjacent pins may be capable of receiving a sling which is connected with a single point load thereby enabling reception of the single point load using the dual throat hook in an efficient and balanced manner.
[0018] Hence, the lifting arrangement provides advantages by ensuring balanced and efficient reception of the single point load using the dual throat hook. It further ensures low maintenance cost, lesser consumption of resources and lesser risk for any mishappening. The lifting arrangement further reduces an undue stress on the sling while lifting the load. Due to reduction of the undue stress on the sling while lifting the load, life and durability of the sling increases. Further, the proposed lifting arrangement is configured to work in workshop with limited overhead space. In addition, the lifting arrangement may be suitable for single point lifting as well as basket/cylindrical lifting.
[0019] Referring to figure 1, that illustrates a various part of the lifting arrangement 100, in accordance with an embodiment of the present subject matter.
[0020] The lifting arrangement 100 may comprise one or more plates 102 which may further comprise at least three pinholes 122. The one or more plates 102 may be of different shapes such as but are not limited to a triangular shape, a rectangular shape, a square shape, etc.
[0021] The lifting arrangement 100 may further comprise at least three pins 110. The at least three pins 110 may be removably connected in the at least three pinholes 122. The lifting arrangement 100 may further comprise a connecting element 104. The connecting element 104 may connect the at least two plates 102 together. The connecting element 104 may be an I-shaped element stiffened by brackets 106 on both sides of the connecting elements. The lifting arrangement 100 may be an assembly of steel structure without any movable parts.
[0022] Each of the at least three pins 110 may further comprise a bar 116. The bar 116 may be of cylindrical shape. The bar 116 may further comprise an end cap plate 114 at one end. The end cap plate 114 may comprise a handle 112 in order to facilitates installation and retrieval with a dual throat hook 302 (shown in figure 3). Further, the bar 116 may comprise a hole 108 at another end for facilitating installation of a securing pin 120. The securing pin 120 may comprise a threaded rod 124 and a nut 118 connected with the threaded rod 124. The threaded rod 124 and the threaded nut 118 may be of hexagonal shape.
[0023] Now referring to figure 2, that illustrates a front view 202, a rear view 204 and a side view 206 of the lifting arrangement 100, in accordance with an embodiment of the present subject matter.
[0024] Now referring to figure 3, that illustrates an internal connection of the lifting arrangement 100, in accordance with an embodiment of the present subject matter.
[0025] The internal connection of the lifting arrangement 100 may comprise the dual throat hook 302 and a sling 304. The sling 304 may be of different types such as but are not limited to an eye-eye sling, an endless cylindrical sling etc. The at least three pins 110 may be attached on the each of the one or more plates 102 in such a way that at least two pins 110 may be situated adjacent to each other and at least one pin 110 may be situated at vertically opposite direction with respect to the at least two adjacent pins 110, thereby forming a triangular shape.
[0026] In one embodiment, the at least three pins 110 which may be removably connected in the at least three pinholes 122 may facilitate connection of the dual throat hook 302 with the one or more plates 102. A diameter of the at least two adjacent pins 110 may be proportional to the circumference of throats of the dual throat hook 302. Due to this, the tight and firm gripping of the dual throat hook 302 with the at least two adjacent pins may be ensured. Further, the at least one pin 110 which is situated at vertically opposite direction from the at least two adjacent pins 110 may be capable of receiving the sling 304 which may be connected with a single point load. Such connection may enable reception of the single point load using the dual throat hook 302 in an efficient and balanced manner.
[0027] Scantlings of various parts used in the lifting arrangement 100 may be chosen to suit the dual throat hook 302. Further, the lifting arrangement 100 may be designed same Safe Working Load (SWL) as the dual throat hook 302.
[0028] Now referring to figure 4, that illustrates a use of the lifting arrangement 100 to lift a beam connection 402, in accordance with an embodiment of the present subject matter.
[0029] In one embodiment, the lifting arrangement 100 may be capable to lift a beam connection 402. Conventionally, more than one dual throat hooks 302 and more than one slings 304 were used to lift the beam connection 402. However, use of more than one dual throat hooks 302 and more than one slings 304 may be a constraint when lifting large objects inside workshops where overhead space is limited. Therefore, the lifting arrangement 100 may be used to lift the beam connection 402 in limited overhead space and without any undue stress on the slings 304.
[0030] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
[0031] Some object of the present invention reduces the number of slings 304 and the lifting arrangement 100 required to lift an object.
[0032] Some object of the present invention ensures long life of the slings 304 due to avoiding of undue stress at lifting and can withstand wear and tear, ensuring long service life.
[0033] The proposed lifting arrangement 100 may facilitate the dual throat hook 302 compatible for lifting the beam connections 402 by providing connection between an eye of the lifting beams 404 and the dual throat hook 302 with minimum loss of overhead height.
[0034] Some object of the present invention enables dual throat hook 302 usable for lifting objects/loads by single point lifting.
[0035] The proposed lifting arrangement 100 for the dual throat hook 302 of cranes may be utilized in each industry with cranes for handling operations. Typical example of the industry includes, but not limited to, shipyards, heavy engineering firms, vehicle manufacturing sector, and infrastructure sector.
[0036] Although implementations for the lifting arrangement 100 have been described in language specific to structural features and/or methods, it is to be understood that the appended claims are not necessarily limited to the specific features described. Rather, the specific features are disclosed as examples of implementation for the lifting arrangement 100.
,CLAIMS:
1. A lifting arrangement for lifting a single point load using a dual throat hook, the lifting arrangement (100) comprising:
one or more plates (102), wherein each of the one or more plates (102) comprising at least three pinholes (122); and
at least three pins (110), removably connected in the at least three pinholes (122), for facilitating connection of a dual throat hook (302) with the one or more plates (102),
wherein diameter of the at least two adjacent pins (110) of the at least three pins (110) is proportionate with circumference of throats of the dual throat hook (302) in order to facilitate gripping of the dual throat hook (302) with the at least two adjacent pins (110); and
wherein the at least one pin (110) of the at least three pins (110) is situated at vertically opposite direction from the at least two adjacent pins (110) and is capable of receiving a sling (304) connected with a single point load thereby enabling reception of the single point load using the dual throat hook (302).

2. The lifting arrangement (100) of claim 1, wherein each of the at least three pins (110) comprises:
a bar (116) having end cap plates (114) at one end, wherein the end cap plates (114) comprises a handle (112) in order facilitates installation and retrieval with the dual throat hook (302); and
a hole (108) at another end for facilitating installation of a securing pin (120), wherein the securing pin (120) comprises a threaded rod (124) and a nut (118) connected with the threaded rod (124).

3. The lifting arrangement (100) of claim 1, wherein the shape of the threaded rod (124) and the threaded nut (118) is hexagonal.

4. The lifting arrangement (100) of claim 1, wherein the at least two plates (102) are connected to each other through a connecting element (104).

5. The lifting arrangement (100) of claim 4, wherein the connecting element (104) is an I-shaped element stiffened by brackets (106) on both sides of the connecting element (104).

6. The lifting arrangement (100) of claim 1, wherein shape of the one or more plates (102) is at least triangular, rectangular, square.

7. The lifting arrangement (100) of claim 1, wherein the lifting arrangement (100) is capable to lift a beam connection (402).