FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
AND
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10; rule 13)
TITLE OF THE INVENTION
“OPENWELL SUBMERSIBLE PUMP”
APPLICANT
CG POWER AND INDUSTRIAL SOLUTIONS LIMITED
of CG House, 6th Floor, Dr. Annie Besant Road, Worli, Mumbai-400030, Maharashtra,
India; Nationality : India;
& Versil Pumps LLP
of GONDAL MAIN ROAD, NEAR KANGASIYALI VILLAGE, DHOLARA-360022, RAJKOT -
GUJARAT; Nationality : India
The following specification particularly describes the invention and the manner in which it is to be performed

OPENWELL SUBMERSIBLE PUMP FIELD OF THE INVENTION
The present invention is related to a submersible pump. More specifically, the
present invention is related to a horizontal open well submersible pump.
BACKGROUND OF THE INVENTION
Generally, a horizontal submersible pump is submersed in the fluid which is to be pumped from the well. A motor of the pump drives the impeller so that fluid is driven to enter from the inlet, and then discharged from the outlet. The fluid inside the pump rotates with the blades and is separated from the impeller under centrifugal action and ejected outwards.
The Japanese publication JP2022046955A discloses a horizontal submersible electric pump comprises: a motor 1 arranged so that a rotational shaft 2 extends in a horizontal direction (X direction); a pump casing 41 that forms a pump chamber 4 in which an impeller 3 connected to the horizontally extending rotational shaft 2 is arranged; a grip part 6; and a grip part mounting member 7 that is provided outside the motor 1, and includes a mounting part 73 to which the grip part 6 is connected, and a leg part 72 for mounting in an installation position.
submersible pump.

The horizontal submersible pumps are operated by means of the manual control of a power switch to avoid continuous running of the submersible pump. When the water level relative to the submersed pump drops to a height that is lower than the pump's intake suction pipe, the submersible pump takes in air and operates without its body being completely filled with water. As a result, the seals are damaged, and water infiltrates into the motor, causing the motor to burn out.
A control panel of the pump is provided separately and away from the pump. Thereby the installation of the pump is complex. Moreover, the 3 core cable is provided without the earthing lead from the control panel to the pump. This leads to complex electrical connections.
A capacitor is an electronic device to store energy. In a submersible pump the capacitor increase the torque of the pump at the start of the pump to boost the motor rotation to the required/critical speed for operation. The capacitor is provided away from the pump and in the control panel along with the MCB (Miniature Circuit Breaker).
Generally the control panel comprises plurality of MCB for various electrical components of the facility. Due to voltage fluctuations, the capacitor is in control panel, may burst and leads to the accidents and failure of power supply to the other components. Also, there is limitation of placing the capacitor along the pump as it is submerged in water, if capacitor become wet it gets damage and stop its function.
Therefore, there is a need in art to provide a submersible pump which overcomes the above stated problem.

OBJECTIVES OF THE INVENTION
The object of the present invention is to provide a submersible pump with a
capacitor integrated in it.
is easy to install.-_..-a submersible pump which
is safe to operate even when the water is not surrounded to the pump.
Yet another object of the prese to provide a submersible pump
which is cost efficient.
SUMMARY OF THE INVENTION
assembly coupled to the motor assembly.
The motor assembly comprising a housing. The housing houses a drive shaft. The drive shaft is positioned in the center of the housing and axially in the housing. A rotor is coupled to the shaft. The rotor is surrounded with a stator.
The pump chamber comprising a chamber housing. The chamber housing having an inlet and an outlet. A first cover is affixed at a first end of the motor assembly. An O-ring or gasket is provided between the housing of the motor and the first cover. The first cover having a first bearing, a mechanical seal and an oil seal. An impeller affixed to the drive shaft at the first end. The drive shaft is driven to drive

the impeller in the radial direction over the axis of the drive shaft. The fluid entered through the inlet is ejected out of the pump through the outlet because of the centrifugal action of the impeller.
The capacitor assembly having a second cover. The second cover is coupled to the motor assembly at a second end of the motor assembly. The second cover having pockets to accommodate a terminal box housing and a diaphragm. A capacitor is housed in the terminal box housing. The capacitor is electrically connected with the motor assembly. Thereby, a 3 core cable with earthing lead is provided from the submersible pump. The box terminal housing is enclosed by means of a terminal box cover. The terminal box cover can have a plurality of apertures. The 3 core cable with earthing lead from the capacitor can pass through the apertures for electrical connection with the power source. The pocket having diaphragm is covered by means of a lid. The diaphragm hermetically seals the box terminal housing. This hermetical sealing avoids the fluid contact, leakage, or seepage of fluid inside the box terminal housing. Thereby capacitor is protected from the fluid surrounding the pump.
The advantageous effect of the present invention is that a separate control panel is not required. Furthermore, a 3 core cable with earthing lead is provided with the pump, which simplifies the installation of the pump. Also, the electrical connection of the pump to the power source is easy like plug and play.
The submersible pump is safest pump in case of capacitor burst due to voltage fluctuations, as capacitor is hermetically concealed inside the capacitor assembly. Furthermore, the rotor and the stator is thermally (cooling fluid inside) & electrically (overload) protected.

BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 depicts a submersible pump the present invention.
Figure 2 shows the enlarged view of a capacitor assembly of the submersible pump.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention as embodied by a “submersible pump" succinctly fulfils the above-mentioned need(s) in the art. The present invention has objective(s) arising as a result of the above mentioned need(s), said objective(s) being enumerated below. In as much as the objective(s) of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective(s) are not exhaustive of the present invention in its entirety, and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative(s) and/or any functional equivalent(s) even though, such structural alternative(s) and/or any functional equivalent(s) are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any

improvisation(s)/modification(s) applied to the structural alternative(s)/functional alternative(s) within its scope and purview. The present invention may be embodied in other specific form(s) without departing from the spirit or essential attributes thereof.
Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
A submersible pump comprising a motor assembly (20) having a first end (25) and a second end (26), a pump chamber (10) coupled to the motor assembly (20) at the first end (25) and a capacitor assembly (30) coupled to the motor assembly (20) to the second end (26).
The motor assembly (20) comprising a housing (21). The housing (21) houses a drive shaft (22). The drive shaft (22) is positioned longitudinally in the center of the housing (21).The drive shaft (22) is positioned in such a way that the drive shaft (22) overhangs from the housing (21) of the motor assembly (20) at both the first end (25) and the second end (26). A rotor (23) is coupled to the shaft. The rotor (23) is radially surrounded with a stator (24).
The pump chamber (10) comprising a chamber housing (11). The chamber housing (11) having an inlet (12) and an outlet (13). The inlet (12) is in axial direction of the submersible pump. The outlet (13) is in tangential direction of the submersible pump. A first cover (15) is affixed at the first end (25) of the motor assembly (20). A first O-ring/gasket (19) is provided between the housing (21) of the motor assembly (20) and the first cover (15). The first cover (15) having a first bearing (18), a mechanical seal (17) and an oil seal (16). An impeller (14)

affixed to the drive shaft (22) at the first end (25). The drive shaft (22) is driven to drive the impeller (14) in the radial direction over the axis of the drive shaft (22). The fluid entered through the inlet (12) is ejected out of the submersible pump through the outlet (13) because of the centrifugal action of the impeller (14).
The first cover (15) can have a cavity (110) for supplying an oil for lubrication of the submersible pump. The cavity (110) is enclosed by means of a plug (111). The plug (111) seals the cavity (110) to prevent the flow of fluid from the outside of the submersible pump.
The capacitor assembly (30) having a second cover (31). The second cover (31) is coupled to the motor assembly (20) at the second end (26) of the motor assembly (20). The second cover (31) having pockets to accommodate a terminal box housing (32) and a diaphragm (35). A capacitor (33) is housed in the terminal box housing (32). The capacitor (33) is electrically connected with the motor assembly (20). Thereby, a 3 core cable with earthing lead (39) is provided from the submersible pump. The terminal box housing (32) is enclosed by means of a terminal box cover (34). The terminal box cover (34) can have a plurality of apertures. The 3 core cable with earthing lead (39) from the capacitor (33) can pass through the apertures for electrical connection with the power source.
The pocket having the diaphragm (35) is covered by means of a lid (36). The diaphragm hermetically seals the terminal box housing (32). This hermetical sealing avoids the fluid contact, leakage or seepage of fluid inside the terminal box housing (32). Thereby capacitor (33) is protected from the fluid surrounding the submersible pump. Moreover, a sealing means (40) is provided between the terminal box cover (34) and the terminal box housing (32). The sealing means

(40) can be a gasket or a grommet or a combination of the gasket and the
grommet.
The capacitor assembly (30) having a second O-ring/gasket (37) and a second bearing (38). The second O-ring/gasket (37) is positioned between the housing
(21) of the motor assembly (20) and the capacitor assembly (30). The drive shaft
(22) is passed through the second bearing (38) in the capacitor assembly (30), thereby the drive shaft (22) is aligned axially and appropriately.
A tie rod (201) is provided to hold outside the housing (21) of the motor assembly (20), first cover (15) and the second cover (31). The tie rod (201) is positioned longitudinally between the first cover (15) and the second cover (31).
The first bearing (18) and the second bearing (38) can be a ball bearing.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the spirit and the scope of the invention may be made by a person skilled in the art.

WE CLAIM:
1. A submersible pump comprising:
a motor assembly (20) having a first end (25) and a second end (26),
the motor assembly (20) comprising a housing (21) to house a drive shaft (22), said drive shaft (22) is positioned longitudinally in the center of the housing (21) and overhangs from the housing (21) of the motor assembly (20) at both the first end (25) and the second end (26), a rotor (23) is coupled to the shaft, and a stator (24) radially surrounding the rotor (23);
a pump chamber (10) coupled to the motor assembly (20) at the first end
(25),
the pump chamber (10) having a chamber housing (11), a first cover (15) affixed at the first end (25) of the motor assembly (20), and an impeller (14) affixed to the drive shaft (22) at the first end
a capacitor assembly (30) coupled to the motor assembly (20) to the second end (26), wherein
the capacitor assembly (30) having a second cover (31) coupled to
the motor assembly (20) at a second end (26) of the motor
assembly (20), the second cover (31) having pockets to
accommodate a terminal box housing (32) and a diaphragm (35),
a capacitor (33) housed in said terminal box housing (32),
the capacitor (33) is electrically connected with the motor
assembly (20) and a 3-core cable with earthing lead (39) is
provided from the submersible pump, the terminal box
housing (32) is enclosed by means of a terminal box cover
(34), and

the pocket having the diaphragm (35) is covered by means of a lid (36), the diaphragm hermetically seals the terminal box housing (32) to the fluid contact, leakage or seepage of fluid inside the terminal box housing (32).
2. The submersible pump as claimed in claim 1, wherein between the housing (21) of the motor assembly (20) and the first cover (15) a first O-ring/gasket (19) is provided, and between the housing (21) of the motor assembly (20) and the capacitor assembly (30) a second O-ring/gasket (37) is provided.
3. The submersible pump as claimed in claim 1, wherein the drive shaft (22) is driven to drive the impeller (14) in the radial direction over the axis of the drive shaft (22).
4. The submersible pump as claimed in claim 1, wherein said chamber housing (11) having an inlet (12) and an outlet (13).
5. The submersible pump as claimed in claim 4, wherein the inlet (12) is in axial direction of the submersible pump and the outlet (13) is in tangential direction of the submersible pump, the fluid entered through the inlet (12) is ejected out of the submersible pump through the outlet (13) because of the centrifugal action of the impeller (14).
6. The submersible pump as claimed in claim 1, wherein the first cover (15) having a first bearing (18), a mechanical seal (17) and an oil seal (16), positioned on the drive shaft (22) at the first end (25) of the motor assembly (20), and the capacitor assembly (30) having a second bearing

(38) positioned near the second end (26) of the motor assembly (20), thereby the drive shaft (22) is appropriately aligned axially.
7. The submersible pump as claimed in claim 1, wherein the first cover (15) having a cavity (110) exteriorly for supplying oil for lubrication of the submersible pump, said cavity (110) is enclosed by means of a plug (111) to prevent the flow of fluid from the outside into the submersible pump.
8. The submersible pump as claimed in claim 1, wherein the terminal box cover (34) comprises a plurality of apertures, said 3-core cable with earthing lead (39) from the capacitor (33) is capable of being pass through the apertures for electrical connection with a power source.
9. The submersible pump as claimed in claim 1, wherein between the terminal box cover (34) and the terminal box housing (32) a sealing means (40) is provided, said the sealing means (40) can be a gasket or a grommet or a combination of the gasket and the grommet.
10. The submersible pump as claimed in claim 1, wherein outside the housing (21) of the motor assembly (20) a tie rod (201) is provided to hold first cover (15) and the second cover (31), said tie rod (201) is positioned longitudinally between the first cover (15) and the second cover (31).