FORM -2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE
Specification
(See Section 10; rule 13)
PUMPS
KIRLOSKAR BROTHERS LTD.
an Indian Company
of Kirloskarwadi, Dist: Sangli,
Pin: 416308, Maharashtra, India.
INVENTORS:
1. PATIL SUJITSINH DINKAR
2. MORE SARJERAO SHIDU
3. KULKARNI PRASAD MADHAVRAO
4. ADMUTHE AMOL ADINATH
5. LONDHE RANJIT SHIVAJIRAO
The following specification particularly describes the invention and the manner
in which it is to be performed.

FIELD OF THE DISCLOSURE
The present disclosure generally relates to pumps.
Particularly, the present disclosure relates to pumps, such as submersible pumps, having low weight.
BACKGROUND
Pumps, such as submersible pumps, are widely used in sewage applications for handling fluids such as unscreened sewage, contaminated effluents, industrial waste water, storm water and the like. Submersible pumps are made of various materials depending upon nature of liquid handled, solid contents in the liquid, specific gravity of the liquid, viscosity of the liquid and environmental conditions.
Conventional submersible pumps are heavy in weight. The conventional submersible pumps include a pump casing, a stator housing, a mechanical seal housing, an upper bearing holder and a lower bearing holder. The various parts of the conventional submersible pumps are heavy in weight and hence cause an increase in the weight of the conventional submersible pump. The heavy weight of the conventional submersible pumps poses problems in handling, assembling and disassembling of the conventional submersible pumps. Further, the conventional submersible pumps generate comparatively more vibrations.
Accordingly, there is need of a pump, such as a submersible pump, that has comparatively low weight. Also, there is need of a pump that is easy to handle,

assemble and dis-assemble. Additionally, there is need of a pump that generates comparatively less vibrations.
OBJECTS
Some of the objects of the system of the present disclosure which at least one embodiment herein satisfies are as follows:
It is an object of the system of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
An object of the present disclosure is to provide a pump, such as a submersible pump, that has comparatively low weight.
Also, an object of the present disclosure is to provide a pump that is easy to handle.
Additionally, an object of the present disclosure is to provide a pump that is easy to assemble and dis-assemble.
Furthermore, an object of the present disclosure is to provide a pump that generates comparatively less vibrations.
Other objects and advantages of the system of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present
disclosure.

SUMMARY
In accordance with one aspect of the present disclosure, a pump is disclosed. The pump includes an integral stator housing, an integral mechanical seal housing and a double bellow mechanical seal. The integral stator housing is formed by integrating structural and functional configuration of an upper bearing holder and a stator housing. The integral mechanical seal housing is functionally connected to the integral stator housing. The integral mechanical seal is formed by integrating structural and functional configuration of a mechanical seal housing and a lower bearing housing. The double bellow mechanical seal is functionally connected to the integral stator housing and the integral mechanical seal housing. The double bellow mechanical seal is formed by integrating structural and functional . configuration of an inboard mechanical seal and an outboard mechanical seal.
Typically, the pump is a submersible pump.
In one embodiment, the double bellow mechanical seal is of rubber.
Further, a motor end cover is disposed over the integral stator housing.
In one embodiment, a plurality of eyebolts is disposed on the motor end cover.
In one embodiment, a cooling chamber is used for facilitating cooling of a motor of the submersible pump.
More specifically, a hose pipe is provided on the cooling chamber.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The pumps of the present disclosure will now be explained in relation to the non-limiting accompanying drawings, in which:
FIGURE 1 illustrates a sectional view of a submersible pump, in accordance with one embodiment the present disclosure;
FIGURE 2 illustrates a perspective view of an integral mechanical seal housing of the submersible pump of Figure 1;
FIGURE 3 illustrates a perspective view of an integral stator housing of the submersible pump of Figure 1;
FIGURE 4 illustrates a perspective view of a double bellow mechanical seal of the submersible pump of Figure 1;
FIGURE 5 illustrates a perspective view of a motor end cover of the submersible pump of Figure 1;
FIGURE 6 illustrates a perspective view of a cooling chamber in accordance with the present disclosure;
Figure 7 illustrates a front view of the submersible pump of Figure 1 in stationary wet installations, where the submersible pump is completely submerged in the fluid and is not provided with a cooling chamber; and
Figure 8 illustrates a front view of the submersible pump of Figure 1 in stationary wet installations, where the submersible pump is not completely submerged and is provided with the cooling chamber.

DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The pumps of the present disclosure will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The description hereinafter, of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with

modification within the spirit and scope of the embodiments as described herein.
A conventional pump has a separate upper bearing holder and a stator housing, both of which are heavy in weight and are difficult of assemble. Similarly, a conventional pump have a separate mechanical seal housing and a lower bearing holder which are again heavy and poses difficulty in assembling and disassembling,
The present disclosure envisages a pump to overcome the drawbacks of the conventional pumps. Figure 1 illustrates a pump (10), such as a submersible pump, in accordance with the present disclosure. The upper, bearing holder and the stator housing of the conventional pump is integrated structurally and functionally to form an integral stator housing (11), as illustrated in Figures 1 and 3, thus, eliminating the upper bearing holder of the conventional pump. The structural and functional integration includes integration of the structural and functional features/ characteristics of the upper bearing holder and the stator housing that are essential to do their intended function and removing un¬necessary features. The integral stator housing (11) reduces the problems involved in assembling the stator housing with the upper bearing holder. Similarly, the mechanical seal housing and the lower bearing housing are integrated structurally and functionally to form an integral mechanical seal housing (12), as illustrated in Figures 1 and 2, so as to eliminate the lower bearing holder of the conventional pump. The structural and functional integration includes integration of the structural and functional features/ characteristics of the mechanical seal housing and the lower bearing housing that are essential to do their intended function and removing un-necessary features.

The conventional pump is provided with an inboard mechanical seal and an outboard mechanical seal having two stationary faces and two rotary faces. The inboard mechanical seal and the outboard mechanical seal of the conventional pump are replaced by a single integrated double bellow mechanical seal (14), illustrated in Figures 1 and 4, made of rubber. More specifically, the double bellow mechanical seal (14) is formed by integrating structural and functional configuration of an inboard mechanical seal and an outboard mechanical seal. The structural and functional integration includes integration of the structural and functional features/ characteristics of the inboard mechanical seal and the outboard mechanical seal that are essential to do their intended function and removing un-necessary features. The double bellow mechanical seal (14) has reduced length and weight in comparison to the conventional mechanical seal and provides ease in assembling and disassembling.
The motor end cover (16), illustrated in Figures 1 and 5, of the present disclosure is reduced in height in order to reduce the weight of the motor end cover. Conventional pumps are provided with bulky handle for lifting the pump. In accordance with the present disclosure, the handle is replaced by eyebolts (18). Thus, the reduction in height of the motor end cover (16) and replacing the handle with the eyebolts (18) enables in reducing the total weight of the motor end cover (16).
The submersible pump (10), in accordance with the present disclosure, may be provided with a cooling chamber (20), illustrated in Figures 1 and 6, for lower submergence. The cooling chamber (20) is provided with a hose pipe (22). The fluid surrounding the motor of the pump (10) is used for cooling the motor, thus, ensuring that certain quantity of the fluid remains in the cooling chamber (20) upto the motor body. This arrangement allows for lower submergence of

the pump in the fluid. Thus, the submersible pump (10) in accordance with the present disclosure enables the use of the pump for the following arrangement:
1. Stationary Wet Installations wherein the pump is completely
submerged in the fluid and is not provided with the cooling chamber
(illustrated in Figure 7); and
2. Stationary Wet Installations wherein the pump is not completely
submerged and is provided with the cooling chamber (illustrated in
Figure 8).
Referring to Figures 7 and 8, the letter "S" denotes 'Suction'Point', the letter "D" denotes "Delivery Point" and the letter "W" denotes "Minimum water level".
TECHNICAL ADVANCEMENTS AND ECONOMICAL
SIGNIFICANCE
The technical advancements offered by the system of the present disclosure which add to the economic significance of the disclosure include the realization of:
> a pump, such as a submersible pump, that provides reduction of weight in the range of 70 - 80 Kg in comparison to the conventional pumps;
> a pump that provides reduction in total height of the pump in the range of 325 to 335 mm in comparison to the presently available conventional pumps:
> a pump that is cost effective;
> a pump that is easy to assemble and dis-assemble due to less number of parts which cause to very less maintenance cost;

> a pump that is easy to handle due to low weight and improved handling configuration; and
> a pump that generates comparatively less vibrations due to less number of parts and low weight.
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.

We claim:
1. A pump comprising:
• an integral stator housing formed by integrating structural and functional configuration of an upper bearing holder and a stator housing;
• an integral mechanical seal housing functionally connected to said integral stator housing, said integral mechanical seal housing formed by integrating structural and functional configuration of a mechanical seal housing and a lower bearing housing; and
• a double bellow mechanical seal functionally connected to said integral stator housing and said integral mechanical seal housing, said double bellow mechanical seal formed by integrating structural and functional configuration of an inboard mechanical seal and an outboard mechanical seal.

2. The pump as claimed in claim 1 is a submersible pump.
3. The pump as claimed in claim 1, wherein said double bellow mechanical seal is of rubber.
4. The pump as claimed in claim 1, further comprising a motor end cover disposed over said integral stator housing.
5. The pump as claimed in claim A, further comprising a plurality of eyebolts disposed on said motor end cover.
6. The pump as claimed in claim 1, further comprising a cooling chamber for facilitating cooling of a motor of said pump.

7. The pump as claimed in claim 6, further comprising a hose pipe provided on said cooling chamber.