DESC:FORM 2
THE PATENTS ACT 1970
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION:
RECOVERY BOTTLE CAP FOR AVOIDING SPILLAGE OF RADIATOR COOLANT
2. APPLICANT:
Name Nationality Address
Tata Toyo Radiator Ltd. Indian Survey No 235/245, Phase 1, Hinjewadi Rajiv Gandhi Infotech Park, Hinjawadi, Pune, Maharashtra 411057, India

3. PREAMBLE TO THE DESCRIPTION:
PROVISIONAL
The following specification describes the invention. COMPLETE
The following specification particularly describes the invention and the manner in which it is to be performed.

RECOVERY BOTTLE CAP FOR AVOIDING SPILLAGE OF RADIATOR COOLANT
FIELD OF THE INVENTION
The present invention relates to heat exchangers and, more particularly, the present invention relates to a recovery bottle cap to avoid spillage of coolant from the vent pipe in radiators.
BACKGROUND OF THE INVENTION
Normally, the radiators are used to dissipate the heat produced inside the engine cylinders in a vehicle. The radiator consists of a pressure cap that keeps the cooling system pressurized, which results in raise in the boiling point. In such situations, the radiator cap maintains the pressure of the system by controlling the flow of the fluid between the radiator and the recovery bottle (100) as shown in figure 1. Once the pressure exceeds the rated pressure in the radiator, the pressure cap valve opens, thereby allowing pressurized coolant to flow into a recovery bottle (100). Thus, the recovery bottle (100) is used as a reservoir for the excess flow of the coolant from the radiators and can be filled up to a level marked thereon as shown in figure 2. The marking of the maximum level on the top surface of the recovery bottle is considered as expansion volume (EV), and the minimum level is considered as drawdown volume (DV).
In certain unpleasant situations, such as the presence of air in the coolant system, the air content may cause steam pockets in the line. This may act like plugs preventing the coolant from continuing to flow. This results in engine overheating because the coolant is stationary inside or it moves very slowly. Hence removal of this air is mandatory and can be made through the recovery bottle (100), which is configured with a provision for a hole on a recovery bottle cap (20). This hole permits passage of the air through a vent pipe (30) to the atmosphere and a vent hose (40).
Additionally, when using the recovery bottle (100) for tractor applications, there is higher vibration impacting the individual parts mounted on the vehicle. Thereby, the splashing of the coolant is observed inside the recovery bottle (100), which in turn tries to enter the vent pipe (30) of the cap (20).
In one of the existing design of the recovery bottle cap (20), at least two openings are provided with a first opening (1) for coolant overflow and a second opening (2) for air passage. The first opening (1) and the second opening (2) are made in a dimension of 5 mm diameter and 2 mm diameter respectively. Further, when the vehicle is under running conditions, the coolant splashing in the expansion area comes directly in contact with these openings, pass therethrough and causes coolant loss. Moreover, the size of the second opening (2) on the cap (20) for air passage seems to be large enough to pass more coolant and no provision has been provided to restrict the coolant from entering to such air passage opening.
Accordingly, there is a need for a recovery bottle cap to avoid spillage of the coolant overflow from the vent pipe and improve the efficiency of the radiator in the vehicles.
OBJECT OF THE INVENTION
An object of the present invention is to keep a radiator cooling system robust and spillage-proof.
Another object of the present invention is to stop oozing out of the coolant from the vent pipe of the recovery bottle in a radiator.
Yet another object of the present invention is to vent the air content formed in the radiator cooling system out in a cost-effective and simpler way without affecting the functionality of the cooling system.

SUMMARY OF THE INVENTION
The present invention discloses a recovery bottle cap that can be hermetically fitted on a mouth of a recovery bottle containing coolant fluid therein. The recovery bottle cap comprising a first component having an upper surface configured with an opening, and a first skirt extending downwardly from the perimeter of the upper surface, a vent pipe mounted on top of the first component, a second component firmly fitted with the bottom side of the first component, and a cover rigidly secured around the first component.
The vent pipe at a first end connected to the upper surface of the first component via the opening and a second end opened to the atmosphere.
The second component has a bottom surface and a second skirt extending upwardly around the perimeter of the bottom surface. The bottom surface is configured with atleast two cavities. The circumferential area of the first and the second skirt forms a chamber between the upper surface of the first component and the bottom surface of the second component.
The cover is configured in contact with the outer wall of the circumferential area of the first skirt and the upper surface of the first component and the vent pipe. The cover is provided with a ledge having an outer ring for securing the first component around the open mouth of the recovery bottle.
Whenever the bottom surface of the second component comes in contact with the coolant fluid in the recovery bottle, the atleast two cavities allow the flow of the coolant fluid along with the air content therethrough towards the chamber and allow to fall back into the recovery bottle while allowing only the air content from the recovery bottle to be escaped through the vent pipe via the opening in the upper surface of the first component. Thereby avoiding spillage of fluid from the recovery bottle.

BRIEF DESCRIPTION OF THE DRAWINGS
The objects and advantages of the present invention will become apparent when the disclosure is read in conjunction with the following figures, wherein
Figure 1 illustrates a pictorial representation of a recovery bottle assembly in a radiator cooling system, in accordance with a prior art technique;
Figure 2 illustrates a pictorial representation of the recovery bottle assembly with markings for coolant level, in accordance with the prior art technique;
Figure 3a illustrates a pictorial view of a recovery bottle cap of the recovery bottle assembly in the radiator cooling system, in accordance with the prior technique;
Figure 3b illustrates a cross-sectional view of a recovery bottle cap of the recovery bottle assembly in the radiator cooling system, in accordance with the prior technique;
Figure 4 illustrates a perspective view of a recovery bottle cap, in accordance with an embodiment of the present invention;
Figure 5a illustrates a closer view of a first component of the recovery bottle cap, in accordance with an embodiment of the present invention;
Figure 5b illustrates a closer view of the second component of the recovery bottle cap, in accordance with an embodiment of the present invention; and
Figure 6 illustrates a cross-sectional view of the recovery bottle cap, in accordance with an embodiment of the present invention.
DETAIL DESCRIPTION OF THE INVENTION
The foregoing objects of the present invention are accomplished and the problems and shortcomings associated with the prior art, techniques, and approaches are overcome by the present invention as described below in the preferred embodiment.
The present invention provides a recovery bottle cap for the cooling system of a radiator. The recovery bottle cap provides a solution for the leakage of the coolant fluid to be escaped through the air vent configured on the cap of the recovery bottle thereby avoiding spillage of coolant fluid from the recovery bottle.
The present invention is illustrated with reference to the accompanying drawings, throughout which reference numbers indicate the corresponding parts in the various figures. These reference numbers are shown in the bracket in the following description.
Referring to figures from 1 to 3, there is shown a recovery bottle cap, in accordance with the prior art invention. Now, referring to figures from 4 to 6, there is shown a recovery bottle cap to be secured on the open mouth of a recovery bottle (100), in accordance with the present invention.
The recovery bottle cap (200) comprises a first component (21), fitted with a second component (22) and a vent pipe (23) for sealing the coolant fluid (“fluid”, hereinafter) contained in the recovery bottle (100) and a cover (25).
The first component (21) includes a flat upper surface (21a) with an opening (A) in a predefined dimension and a skirt (22b) extends downwardly from the perimeter of the upper surface (21a). In the embodiment, the opening (A) is configured at the top surface of the cap for receiving the vent pipe (23). The vent pipe (23) having a first end connected to the opening at the upper surface of the first component (21) and a second end freely opened to the atmosphere. This arrangement provides an air opening for the fluid contained in the recovery bottle (100) for releasing the air content therein to the outside environment. The first component (21) is fitted with the second component (22) at the bottom side.
The second component (22) includes a bottom surface (22a) and a second skirt (22b) extending upwardly around the perimeter of the bottom surface (22b). The bottom surface (22a) is a flat surface configured with atleast two cavities (B1, B2) with maximum distance therebetween. The second component (22) is firmly fitted with the bottom side of the first component (21) in such a way that the first skirt (21b) is circularly contiguous around the circumferential area of the second skirt (22b).
The cover (25) is a rigid component for securing the first component (21) and the vent pipe (23) therein. The cover (25) spans around the outer circumferential area of the first skirt (21b) upper surface (21a) of the first component (21) and the vent pipe (23) to provide a firm support thereto. The cover (25) is further provided with a ledge (25a) having an outer ring (25b) for securing the first component (21) around the open mouth of the recovery bottle (100). The contact between the inner perimeter of the outer ring (25b) and the circumferential area of the mouth of the recovery bottle makes a hermetical sealing of the recovery bottle and the fluid therein.
In one of the exemplary embodiments, the circumferential area of the first and the second skirt (21b, 22b) forms a chamber (26) between the upper surface (21a) of the first component (21) and the bottom surface (22a) of the second component (22). In the embodiment, the circumferential area of the first skirt (21a) abuts the circumferential area of the second skirt (21a) forms a vertical wall for the chamber.
In one of the embodiments, the cavities (B1, B2) are provided at the bottom surface of the second component (22) with maximum distance therebetween. The cavities (B1, B2) are made such that the fluid in the recovery bottle (100) may come in contact therewith when it is experienced with any splatter due to movements in the vehicle. The cavities (B1&B2) allow the flow of the fluid therethrough towards the chamber (26) and falling of the fluid back into the recovery bottle (100) while allowing the air from the recovery bottle (100) to be escaped through the vent pipe (23) via the opening (A) in the upper surface (A) of the first component (21). This also allows the air to be passed through the opening (A) and restricts the passage of the coolant through the air vent opening (A) of the first component (21).
Thus, the first component (21) creates restrictions for the fluid flow due to the smaller diameter of the openings on the first component (21) and the second component (22), thereby avoiding spillage of fluid in the recovery bottle (100).
In one of the exemplary embodiments, the first component (21) and the second component (22) are made using an injection molding process.
In one of the exemplary embodiments, the first component (21) and the second component (22) are assembled using the ultrasonic plastic welding process. In the ultrasonic plastic welding process, the joining or reforming of the thermoplastics is done through the use of heat generated from high-frequency mechanical motion. This is accomplished by converting high-frequency electrical energy into high-frequency mechanical motion.
In one of the exemplary embodiments, the atleast two cavities (B1, B2) are made with a diameter of 1.5mm.
In one of the exemplary embodiments, the opening (A) is configured with a diameter of 2mm.
Advantages of the invention
1. The recovery bottle cap (200) reduces the coolant fluid loss through the recovery bottle cap by restricting the direct coolant flow using the second component (22) therein.
2. The recovery bottle cap (200) provides a simple and cost-effective solution for the recovery bottle caps.
3. The recovery bottle cap (200) of the present invention provides much smaller sized openings in the cap as compared to existing ones.
The foregoing objects of the invention are accomplished and the problems and shortcomings associated with prior art techniques and approaches are overcome by the present invention described in the present embodiment. Detailed descriptions of the preferred embodiment are provided herein; however, it is to be understood that the present invention may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in virtually any appropriately detailed system, structure, or matter. The embodiments of the invention as described above and the methods disclosed herein will suggest further modification and alterations to those skilled in the art. Such further modifications and alterations may be made without departing from the spirit and scope of the invention.

,CLAIMS:We claim:
1. A recovery bottle cap (200), the recovery bottle cap (200) is hermetically fitted on a mouth of a recovery bottle (100) containing coolant fluid therein, the recovery bottle cap (200) comprising:
a first component (21) having an upper surface (21a) and a first skirt (21b) extending downwardly from the perimeter of the upper surface (21a), the upper surface (21a) is configured with an opening (A);
a vent pipe (23) mounted on top of the first component (21), the vent pipe at a first end (23a) connected to the upper surface of the first component (21) via the opening (A) and a second end (23b) opened to the atmosphere;
a second component (22) firmly fitted with the bottom side of the first component (21), the second component (22) having a bottom surface (22a) and a second skirt (22b) extending upwardly around the perimeter of the bottom surface (22b), the bottom surface (22a) is configured with atleast two cavities (B1, B2), wherein the circumferential area of the first and the second skirt (21b, 22b) forms a chamber (26) between the upper surface (21a) of the first component (21) and the bottom surface (22a) of the second component (22);
a cover (25) rigidly secured around the first component (21), the cover is configured in contact with the outer wall of the circumferential area of the first skirt (21b) and the upper surface (21a) of the first component (21) and the vent pipe (23), the cover (25) is provided with a ledge (25a) having an outer ring for securing the first component (21) around the open mouth of the recovery bottle (100);
wherein, whenever the bottom surface (22a) of the second component (22) comes in contact with the coolant fluid in the recovery bottle (100), the atleast two cavities (B1, B2) allow the flow of the coolant fluid along with the air content therethrough towards the chamber (26) and falling back into the recovery bottle (100) while allowing only the air content from the recovery bottle (100) to be escaped through the vent pipe (23) via the opening (A) in the upper surface (21a) of the first component (21), thereby avoiding spillage of fluid from the recovery bottle (100).
2. The recovery bottle cap (200) as claimed in the claim 1, wherein the first component (21) and the second component (22) are made using an injection molding process.
3. The recovery bottle cap (200) as claimed in the claim 1, wherein the first component (21) and the second component (22) are assembled using the ultrasonic plastic welding process.
4. The recovery bottle cap (200) as claimed in the claim 1, wherein the atleast two cavities (B1, B2) has a diameter of 1.5mm.
5. The recovery bottle cap (200) as claimed in the claim 1, wherein the opening (A) in the upper surface (21a) of the first component (21) has a diameter of 2mm.
Dated this on 8th day of December, 2022

Prafulla Wange
(Agent of Applicant)
(IN/PA-2058)