FORM - 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION (See section 10 and rule 13)
INSERTS FOR BACKHOE LOADER
Applicant:
MAHINDRA & MAHINDRA LIMITED
An Indian Company,
GATEWAY BUILDING, APOLLO BUNDER, MUMBAI - 400001,
MAHARASHTRA, INDIA.
Inventors;
SHAMIT SHRIVASTAV,
RASHID ANWAR,
JAYESH BHOSLE,
all Indian Nationals.
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

Field of the Invention
The present invention relates to the inserts for backhoe loader, particularly a plurality of inserts for a backhoe loader, more particularly a set of inserts for backhoe loader.
Background of the Invention & Prior-art
A backhoe loader is an earthmoving machine used for excavating the earth and loading the excavated material into trucks. The backhoe loader does this with the help of the buckets attached at its both ends. The backhoe loader is used for various applications, such as for road construction, making plots, laying pipes, land-levelling in agricultural application and in pipe trench filling and for waste management etc. Apart from earth excavation and loading, the buckets of the backhoe loader are also used for spreading sand and/or aggregates, both in linear and lateral directions in applications, such as road construction. Often, these buckets are also required to do compacting of soil during pipe-laying.
The embodiment of the present invention is discussed in the following relates a backhoe loader used for rural road construction. However, it should be understood that the idea underlying the invention can be applied equally well for any other earth-moving and construction operations including and not limiting to those discussed above.
In a developing country like India, a good road network has an important role to play in the economic growth of its citizens. Moreover, rural connectivity is perceived as one of the major factors for increasing the agricultural output and thereby the earning capacity of the rural population. Good accessibility to rural areas also provides an improvement in governance and in providing other facilities such as post offices, access to police in case of emergencies and also in making available other necessary communication system. As a measure of poverty reduction, Government of India has launched Pradhan Mantri Gram Sadak Yojana

(PMGSY) in December, 2000. Since the inception of this PMGSY scheme, building roads in rural areas by adopting innovative and low-cost options in road construction technology has been the guiding factor. This stress on low-cost technology means that the all the stake-holders involved in rural road construction have to adopt cost-efficient technologies and equipment for faster and cost-effective quality construction of rural roads.
A typical rural road construction activity includes the following main stages:
Stage 1: Earthwork-
a) Terrain inspection and marking by a manual process,
b) Road width cutting by using backhoe loader/s,
c) Laying and spreading murum or subgrade by using backhoe loader/s,
d) Compaction by static roller/s;
Stage 2: Sub-base-
e) Stone breaking using rural manpower,
f) Sub-base laying with approx 60 mm size stones/aggregates again using backhoe loader/s,
g) Spreading sub-base using both backhoe loader/s and rural manpower,
h) Compacting by static roller/s;
Stage 3: Base-
i) Base laying with approx 40 mm size stones/aggregates using backhoe
loader/s, j) Spreading base using both backhoe loader/s and rural manpower, k) Compacting the base by using static roller/s; and
Stage 4: Surface course-
1) WBM (Water bound macadam) surfacing using local manpower,
m) Carpeting hot-mix by manual spraying, and
n) Sealing coat + powder application using local manpower.

The backhoe loader has one bucket each at either end. The loader bucket at one end of the backhoe loader is usually used as a loading or dozing bucket, while the backhoe bucket is primarily used for digging and also for side spreading and compaction of the construction materials, such as soil and aggregates.
In the conventional backhoe loaders, both these buckets are directly used for handling road construction materials, e.g. soil and aggregates. Since these road construction materials are directly handled by these buckets, these buckets normally get worn out very fast and need frequent repairs or replacements as well.
While pushing soil and aggregates by the loader bucket during levelling and dozing operations, the material cannot be levelled evenly which necessitates a higher number of passes to be made by the backhoe loader for obtaining correct levelling of the material for proper road construction. Similarly, during side spreading operation by the backhoe bucket, due to its curved sides, the material to be spread cannot be spread evenly and crests and troughs are normally formed in the surface of the spread material, and even thickness of the material to be spread for road construction is not achieved. Finally, during compaction of the material laid by the operations discussed above, because of the curved surface of the backhoe bucket, again, the compaction of the material is also not satisfactory.
It was observed that the conventional configuration of the backhoe loader/s used during some of these operations, e.g. c), g) and j) above was not satisfactory and not fast enough. Similarly, some other operations, e.g. d), f) and i) above also needed improved performance from the backhoe loader/s.
For example, during land-development in applications like plotting and rural road construction, during levelling of uneven land to be plotted, the quality of the land profile obtained is not satisfactory and the time required is also substantially higher due to higher number of passes required for this operation.

During compacting of the soil/earth, the conventional bucket strokes compress a limited area and the amount of compaction achieved is not sufficient. Further, during the spreading operation, the conventional bucket of the backhoe loader does not allow large areas to be swept.
This complicates subsequent levelling operation. Moreover, crests and troughs are clearly visible, which make the land development unsatisfactory. Since the buckets of the backhoe loaders are directly involved in these operations, the bucket surfaces are subjected to high wear and tear and thereby the service life of the backhoe loader buckets is also reduced substantially.
In the same manner, during pipe/cable laying work, once pipes/cables are laid in the trench dug therefor, the backhoe loader bucket pushes soil and other filling materials from one side of the trench and pulls them from the other side of the trench. However, in its present configuration, the backhoe loader bucket requires to make a large number of passes during compaction of this soil for covering the pipes/cables laid in the trench.
Although, several manufacturers offer special attachments for some of the above operations, these attachments are exorbitantly priced and cannot be afforded by the contractors involved in low-cost applications, such as rural road construction. Moreover, these attachments can only be used by removing the buckets of backhoe loader, which also requires substantial time for dismounting and mounting the buckets and these attachments from/to the backhoe loader, thereby further increasing the costs of rural road construction.
Disadvantages with the prior art & solution offered to remove the same
Therefore, the conventional configurations of the backhoe loader buckets is best suited to do digging and loading operation, however it is unsuitable for spreading or compacting soil. In order to improve upon the conventional backhoe loader/s,

the applicants have devised various inserts; rather a kit or set of inserts, which when fitted on the conventional backhoe loader/s could be effectively activated and deactivated to reduce the time required in various road construction activities. These inserts significantly improved the quality of road construction by using them for backhoe loader buckets.
From the application of pipe/cable laying discussed above, the applicants came to the conclusion that there is also a possibility to improve upon the present pipe/cable laying process using the backhoe loader by reconfiguring the backhoe loader buckets by equipping them with these inserts. However, all the inserts mounted on the backhoe bucket or the loader bucket of the backhoe loader do not have any negative affect on other design criteria and performance of the bucket as compared to the conventional buckets of the backhoe loader (configured without the inserts/insert mountings).
Objects of the Invention
Some of the objects of the present invention - satisfied by at least one embodiment of the present invention - are as follows:
The object of the present invention is to provide inserts for buckets of backhoe loader for a cost-effective road construction.
An object of the present invention is to provide inserts for buckets of backhoe loader for facilitating a more effective backhoe loader operation during road construction, plotting and other land development activities.
A further object of the present invention is to provide inserts for buckets of backhoe loader, which reduces the time required for dismantling/mounting them on backhoe loader.

Another object of the present invention is to provide inserts for buckets of backhoe loader, which involve substantially lower capital costs.
Yet another object of the present invention is to provide inserts for buckets of backhoe loader, which impart substantially higher service life to the conventional buckets of the backhoe loaders.
Still further object of the present invention is to provide inserts for buckets of the backhoe loader, which dispenses with any need for dismantling/mounting buckets of the backhoe loader for attaching specialized attachment for different applications, e.g. excavation, trenching and sand applications,
A yet further object of the present invention is to provide inserts for buckets of backhoe loader, which particularly facilitate spreading, compacting and dozing operations.
Summary of the Invention:
In accordance with the present invention, a plurality of inserts for the backhoe loader having a loader bucket and a backhoe bucket, wherein a respective insert is provided on each bucket for carrying out operations, such as levelling and/or spreading and/or compacting, and wherein each of said buckets is provided with at least a plurality of holes for fixing said respective insert on said buckets.
Typically, one of said insert is a levelling or dozing insert configured 'L'-shaped and having a flat horizontal base, a substantially vertical face with side extensions, said base is configured with at least a plurality of holes corresponding to holes provided on the respective bucket for mounting the bucket teeth.
Typically, the one of said inserts is a spreading insert configured with a substantially flat surface and having straight or curved edges for carrying out uniform spreading of the material by the respective bucket, said flat surface is

provided with at least a plurality of holes corresponding to the holes provided on said respective bucket for mounting it on said respective bucket.
Typically, the one of said inserts is a compacting insert configured with a substantially flat surface with a plurality of holes for passing a respective mounting pin therethrough, for fixing said insert on said bucket for compacting of material being handled by said bucket, wherein one compression spring is mounted on the respective mounting pin and disposed between said bucket and said insert, said springs absorb the shocks generated during compaction strokes of said bucket, prevent transmission of said shocks to the backhoe loader and assist in compaction strokes of said bucket by using energy stored therein.
Typically, the inserts are made of a wear-resistant material, e.g. metal, alloy, plastic.
Typically, at least one of the straight edges thereof is configured to be wear resistant for increasing the service life of said insert.
Typically, the holes in the backhoe buckets are covered by caps when the inserts are not in use.
Description of the Present Invention
The idea underlying the present invention is to make these backhoe loader buckets more efficient in performing the tasks of spreading, levelling and compacting. This is achieved, e.g. by incorporating specialized components configured on the buckets of the backhoe loader of the applicant, i.e. by trade name 'Earthmaster'. In the above description, these are generally referred to as "inserts". These inserts can be easily mounted on the conventional buckets to perform the desired road construction activities, such as spreading, levelling and compacting. However, these are not merely limited applications for these operations. The configurations of the inserts proposed and developed in accordance with the present invention are

explained in more detail in the following description with reference to the accompanying drawings.
Brief Description of the Accompanying Drawings
The present invention will be briefly described with reference to the accompanying drawings, which include:
Figure 1 shows a perspective view of a backhoe loader bucket ready to be provided with a levelling or dozing insert in accordance with the present invention, which is ready to be fitted on a backhoe loader bucket;
Figure 2 shows a perspective view of a backhoe bucket of the backhoe loader ready to be provided with a side spreading insert in accordance with the present invention;
Figure 3A shows a perspective view of a backhoe bucket of the backhoe loader ready to be provided with a compaction insert in accordance with the present invention;
Figure 3B shows an orthogonal side view of a backhoe bucket ready to be provided with a compaction insert by means of fasteners as shown in Figure 3A above;
Figure 4A shows a road surface made by using a conventional backhoe loader by a conventional backhoe bucket during levelling or dozing operation;
Figure 4B shows an improved road surface obtained by using a backhoe bucket provided with a levelling insert in accordance with the present invention which improves the levelling and dozing operation;
Figure 5A shows an illustrative sketch of the road surface made by using a backhoe loader with a conventional backhoe bucket during spreading operation;

Figure 5B shows an illustrative sketch of the improved road surface obtained by using the backhoe loader bucket provided with a spreading insert in accordance with the present invention during spreading operation;
Figure 6A shows an actual site image of a conventional backhoe loader working on the road surface made during a conventional spreading operation;
Figure 6B shows an actual site image of an improved road surface obtained by using a backhoe loader bucket provided with a spreading insert in accordance with the present invention, while carrying out the spreading operation;
Figure 7A shows an actual site image of backhoe loader with a conventional backhoe bucket while working on the road surface obtained by conventional levelling operation;
Figure 7B shows an actual site image of an improved road surface obtained by using a backhoe loader with a backhoe bucket fitted with a levelling/dozing insert in accordance with the present invention by carrying out the levelling operation;
Figure 8A shows an actual site image of a conventional backhoe loader with a conventional backhoe bucket while working on the road surface and the road surface obtained by conventional compacting operation;
Figure 8B shows an actual site image of an improved road surface obtained by using a backhoe loader bucket provided with a compacting insert in accordance with the present invention by carrying out the improved compacting operation; and
Figure 8C shows a typical road surface laid with road construction material, which is obtained one side by a conventional backhoe bucket and on the other side by the backhoe bucket provided with the insert in accordance with the present invention.

Detailed Description of the Accompanying Drawings
Various inserts configured in accordance with the present invention to be fitted on the bucket of the backhoe loader will now be described in more details with reference to the accompanying drawings. These inserts are only represented and explained as preferred embodiments of the invention and do not limit the scope and ambit of the present disclosure in any way.
Figure 1 shows a backhoe loader bucket 10 fitted with a levelling or dozing insert 20. The bucket 10 has two substantially vertical side surfaces 12, a curved or profiled rear surface 13, a lower flat surface 14 and a top surface 15 substantially parallel to the lower flat surface 14. These four surfaces 12,13,14 and 15 together form the loader body which is normally used for levelling and dozing operation. During the forward movement of the backhoe loader, the loader bucket 10 collects construction material, e.g. soil or aggregates etc. to its capacity depending on the selective tilting of the bucket by the loader operator and then this material is loaded on a waiting truck or vehicle. Alternatively, it merely pushes or pulls the material in a forward or rearward direction, wherein the material is laid in an undulating layer, which is not uniform due to the vehicle movement and vibrations occurring because of uneven surface on which the backhoe loader is moving. Similarly, the material can be dozed and levelled using this bucket loader, i.e. by moving in a forward direction using the front edge 19 of bucket 10 or by moving in a rearward direction using either the base 17 or the top surface 15 of the bucket 10, when bucket 10 is rotated backwards on its axis by the loader operator. However, the dozed or levelled surface is not satisfactory and therefore the applicants have configured the loader body by providing the levelling or dozing insert 12 for a more effective and uniform levelling and dozing operation. The embodiment of the levelling and dozing insert 20 represented here is described further in more detail. L-shaped dozing or levelling insert 20 is preferably made of a single wear resistant material plate, which is formed with a horizontal flat surface 22 with two side edge extensions 24 and a vertical flat surface 23. The

insert 20 can be fixed to the lower surface 14 of the bucket 10 by means of a plurality of mounting bolts 25 and locking nuts 26. The lower flat surface of the bucket 10 and the horizontal flat surface 22 of the insert 20 are provided with respective holes 18, 28 for fixing the insert 20 under the lower flat surface 14 of the backhoe loader bucket 10. In an alternative configuration (not represented here), the insert can be configured such that the 22, 23 and 24 are suitably hinged to each other and thus can be retracted and/or folded away from the front edge 19 of the bucket 10 for normal loading operation. Any conventional retraction/folding mechanism, e.g. hydraulically or pneumatically operated system or any other similarly functioning mechanism can be used for selectively activating and deactivating the insert 20 fitted on the bucket 10 by the backhoe loader operator. This may help in preventing any damage to the insert mechanism during normal loading operations as well as may help in saving precious time for repeated mounting and dismounting the insert 20 on the loader bucket 10.
Figure 2 shows a backhoe bucket 30 of the backhoe loader BL and a preferred embodiment of the flat side insert plate 40 configured for road construction material spreading operation. This side insert 40 is fitted on one of the sides of the backhoe bucket 30 by means of fasteners 46, which pass through holes 48 therein. The sides 32 of the backhoe bucket 30 are also provided with corresponding holes 37 for fastening this side insert plate 40 on the backhoe bucket 30 by means of nuts 38 tightened on the inner side of the bracket 32 of the backhoe bucket 30. The backhoe bucket 30 is also provided with teeth 36 and side teeth 39 for excavation and digging operations. Alternatively, the side insert plate 40 may be configured such that it consists of a plurality of pieces which can be retracted and/or folded and safely locked within the projection of the bracket 32 of the backhoe bucket 30. Again, any conventional retraction and/or folding mechanism, i.e. either a hydraulically or pneumatically operated system or any other similarly functioning mechanism can be used by the backhoe loader operator for selectively retracting and/or folding the side insert 40 provided on the backhoe bucket 30. This may help in preventing any damage to the insert mechanism during normal excavating

and/or digging operations of the bucket as well as may help in saving precious time for repeated mounting and dismounting the side insert 40 on the loader bucket 40.
Figure 3A shows a flat compaction insert plate 60 to be fitted under a backhoe bucket 50. The plate insert 60 includes a plurality of holes 62 for passing a corresponding mounting pin 64 to be tightened by means of a respective nut 68. One compression spring 66 each is placed between the bottom surface of the backhoe bucket 50 and the plate insert 62. The compression springs 66 absorb any shocks being generated from the compaction strokes and also prevent these shocks from being transmitted to the machine. The energy stored in the springs also assists in compaction strokes. As discussed in respect of Figures 1 and 2, the backhoe bucket 50 includes side brackets 52 joined to a curved surface 53. A plurality of excavating and/or digging teeth 56 and side teeth 59 are provided on the front portion 54 of the curved portion 53 and a flat top surface 55 is provided at the other end of the curved surface 53. A plurality of holes 58 are provided near the front portion 54 for passing mounting pins 64 for fixing the compaction insert plate 60 by means of nuts 68.
The holes in the backhoe buckets can be covered by caps when the inserts are not in use, also alternate mounting mechanism can eliminate the need for holes on the bucket.
Figure 3B shows an orthogonal projection of the backhoe bucket 50 and the compaction plate insert 60 to be fitted thereunder for compaction of the soil/earth layer and/or of the trench covering earth/soil. Alternatively this compaction plate 60 can be integral part of the machine and can also be activated or deactivated using any conventional mechanism - hydraulic (using cylinders) or electrical system (using motors).

Figure 4A shows a road surface made by a conventional backhoe loader during a spreading operation using conventional buckets, i.e. buckets without the insert in accordance with the present invention. Here, the road sides 72 are shown, between which the road construction materials, e.g. soil/aggregate 74 are levelled for subsequent operation of spreading and compacting. However, it can be seen that road surface 76 is uneven and many tyre marks of the backhoe loader are also present thereon, making the road surface unsuitable and of poor quality, which is not good enough for subsequent spreading and compacting operations.
Figure 4B shows an improved road surface obtained by using a backhoe loader using the buckets provided with levelling inserts for carrying out the levelling/dozing operation. It can be seen that the road surface 76 is uniform here and very few tyre marks are observed in the road surface in the soil/aggregate 74 after the levelling operation. This makes it of desired quality which is suitable for subsequent spreading and compacting operations.
Figure 5A shows an illustrative sketch of the road surface obtained by spreading the road construction materials by a conventional backhoe loader BL by means of a backhoe bucket B (which conventionally has no insert) which can be moved sidewise in the direction of arrows S. It can be seen in this figure that the road surface has many unevenness 78 (crests and troughs), which make it unsuitable for subsequent compacting operation. This happens because of the curved profile for the backhoe bucket used for spreading of road construction materials.
Figure 5B shows an illustrative sketch of the improved road surface obtained by using a backhoe loader having a backhoe bucket B provided with an insert plate I for spreading the material for the road construction. Since insert I has a straight edge, the obtained road surface 80 is even and uniform, and is thus suitable for subsequent compacting operations. Preferably, the insert I is provided only on one side of the backhoe bucket B in order to reduce the load on backhoe loader.

Figure 6A shows an actual image at site of conventional backhoe loader BL using a backhoe bucket B for spreading the road construction material AG on the road surface.
Figure 6B shows an actual image at site of a backhoe loader backhoe using a bucket B provided with a spreading insert I for carrying out spreading operation from the heap of road construction material AG.
Figure 7A shows an actual image at site of a conventional backhoe loader BL using a loader bucket LB for obtaining the road surface 78 by levelling of road material spread from heaps of material AG in a conventional operation-Figure 7B shows an actual image at site of an improved road surface 80 obtained by using a backhoe loader bucket LB provided with a levelling insert I by carrying out the levelling operation, whereby the road surface obtained is much improved as compared to that obtained by the conventional backhoe loader bucket.
Figure 8A shows an actual image at site of a conventional backhoe loader having a conventional backhoe bucket B for spreading road construction material AG on the road surface 78 obtained, which is uneven and non-uniform, thus making it unsuitable for subsequent compacting operations-Figure 8B shows an actual image at site of an improved road surface 80 obtained by using a backhoe loader bucket B fitted with a compacting insert I after carrying out the compacting operation. The obtained road surface 80 is even and uniform, thus suitable for subsequent compacting operations.
Figure 8C shows a comparative layer thickness of road construction material obtained on the road surface by using conventional buckets on backhoe loader (case A) and by using a bucket provided with a compacting insert (case B). It is clear from the example shown here, that the original road construction material

layer thickness RL of about 8.5" spread on the road surface is reduced to a thickness RLa of about 7,5" by the conventional bucket, whereas it is reduced to a thickness RLb of about 6" by using the bucket with inserts provided in accordance with the present invention. This is a substantial improvement in road surface by using very cost-effective inserts on the conventional buckets of the backhoe loader and that too without removing the buckets therefrom. This obviates the requirement of purchasing high-cost sophisticated specialized attachments available in the market by contractors working at low margins, e.g. in rural road construction work. Moreover, these attachments are heavy in comparison to the set of inserts in accordance with the present invention, which can also be provided to the purchaser of the backhoe loaders either along with the loader as a kit or can be bought by the existing owners of the backhoe loaders at a very nominal additional cost.
The following table briefly indicates the benefits accrued by using various inserts configured in accordance with the present invention, when used on the buckets of the backhoe loader-

Operation done
on the
heaps/piles of
material Operation i achieved Speed of operation

Conventional Bucket Bucket with
Insert of the
Invention*
Remarks
Spreading YES YES Faster than
conventional
machine * Better than conventional bucket
Levelling YES YES Faster than
conventional
machine * Better than conventional bucket
Compaction up to 6" NO YES - * Much better to conventional bucket

Technical advantages and economic signiilcance:-
(i) The bucket of backhoe loader fitted with the inserts in accordance with the present invention increase the effectiveness of the backhoe loader operation, wherein:
• During levelling operation, the quality of surface produced is substantially better than conventional buckets of backhoe loaders,
• Reduced number of passes (to and fro motion of backhoe loader bucket) are necessary for obtaining the desired surface quality,
• During compaction of soil/earth, each compaction stroke of the bucket compresses a much larger area and the amount of compaction achieved is also higher compared to the conventional bucket of the backhoe loader,
• During spreading of soil/aggregate, the plate insert allows a larger area to be swept, thereby aiding in the next operation of levelling,
• The bucket fitted with inserts in accordance with the present invention produces lower magnitude crests and troughs as compared to the conventional bucket of the backhoe loader, e.g. Mahindra's EarthMaster,
(ii) The inserts according to the present invention, fitted on the bucket of the backhoe loader render it more versatile and also increase its productivity by performing the operations faster than the conventional bucket of backhoe loaders,
(iii) The inserts according to the present invention increase the service life of bucket of the backhoe loader because of lower wear and tear of bucket, as it is not directly used for these operations,

(iv) The most important advantage of using these inserts is that no separate attachments are required to be installed in place of the buckets,
(v) The inserts according to the present invention are mounted on the buckets by means of nuts and bolts,
(vi) All the inserts mounted on the buckets of the backhoe loader do not negatively affect other design criteria and performance of the bucket as compared to the conventional buckets (configured without inserts/insert mountings).
It should be understood that the embodiment described herein is merely a preferred embodiment of the present invention. Therefore, the person skilled in the art may practice it with any modification within the spirit and ambit or scope of the embodiment as described in accordance with the present invention.
Accordingly, this illustrative exemplary embodiment should not be construed as limiting the scope of the present invention. It is to be understood that the phraseology or terminology employed in this specification is merely for the purpose of description and not for limiting the scope thereof.
The exemplary embodiment described in this specification is intended merely to provide an understanding of various manners in which this embodiment may be used and further to enable the skilled person to practice this invention in the relevant art. The description provided herein is purely by way of example and illustration.
Various features and advantageous details are explained with reference to the non-limiting embodiment described above in accordance with the present invention. The descriptions of well-known components and manufacturing and processing techniques are consciously omitted in this specification, so as not to unnecessarily obscure the specification.

While considerable emphasis has been placed on the specific features of the preferred embodiment described here, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiments without departing from the principles of the present invention. These and other changes in the preferred embodiment of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation thereof.

We claim:
1. A plurality of inserts for the backhoe loader having a loader bucket and a backhoe bucket, wherein a respective insert is provided on each bucket for carrying out operations, such as levelling and/or spreading and/or compacting, and wherein each of said buckets is provided with at least a plurality of holes for fixing said respective insert on said buckets.
2. Inserts as claimed in claim 1, wherein one of said insert is a levelling or dozing insert configured 'L'-shaped and having a flat horizontal base, a substantially vertical face with side extensions, said base is configured with at least a plurality of holes corresponding to holes provided on the respective bucket for mounting the bucket teeth.
3. Inserts as claimed in claim 1, wherein one of said inserts is a spreading insert configured with a substantially flat surface and having straight or curved edges for carrying out uniform spreading of the material by the respective bucket, said flat surface is provided with at least a plurality of holes corresponding to the holes provided on said respective bucket for mounting it on said respective bucket.
4. Inserts as claimed in claim 1, wherein one of said inserts is a compacting insert configured with a substantially flat surface with a plurality of holes for passing a respective mounting pin therethrough, for fixing said insert on said bucket for compacting of material being handled by said bucket, wherein one compression spring is mounted on the respective mounting pin and disposed between said bucket and said insert, said springs absorb the shocks generated during compaction strokes of said bucket, prevent transmission of said shocks to the backhoe loader and assist in compaction strokes of said bucket by using energy stored therein.

5. Inserts as claimed in anyone of the preceding claims, wherein said inserts are made of a wear-resistant material, e.g. metal, alloy, plastic.
6. Inserts as claimed in anyone of the preceding claims, wherein at least one of the straight edges thereof is configured to be wear resistant for increasing the service life of said insert.
7. Inserts as claimed in anyone of the preceding claims, wherein the holes in the backhoe buckets are covered by caps when the inserts are not in use.