FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
THE PATENTS RULES, 2006
COMPLETE
Specification
(See Section 10 and Rule 13)
TAMPER PREVENTING ARRANGEMENT FOR KINETIC AIR VALVES
KIRLOSKAR BROTHERS LTD.
an Indian Company,
Of Yamuna, 2nd floor, S. No. 98/3-7,
Baner, Pune-411 045,
Maharashtra, India.
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF INVENTION
The invention relates to the field of valves.
In particular the invention relates to the field of valves used in water
pipelines.
BACKGROUND
Kinetic air valves are commonly used in air venting or admission service in water pipelines. Kinetic air valves are designed to operate with floating balls. When the pipelines starts filling with water, air in the pipeline is compressed and flows into the air valves which releases the air through a large Orifice chamber. When the water reaches the air valve, it fills the large orifice chamber, and some of the water enters into a seal operating chamber, causing sealing assemblies to close. Pressure is developed in the high pressure chamber which pushes the ball upwards and allows complete contact with kinetic nozzle and closes the passage.
During normal working condition accumulated air under pressure is released through a nozzle provided in the high pressure chamber of the kinetic air valve.
With a reduction in the pressure in the pipeline during drainage or shut-off, the force is reduced on the kinetic sealing assembly and releases its contact with the large orifice ball. This opens the kinetic nozzle which results in drawing air from the atmosphere into the system.
However, the kinetic air valves are severely damaged by tampering of the valve with external mechanisms. Tampering is carried out in order to

illegally collect water for daily usage. One method of tampering is carried out by pressing the ball and/or damaging the ball located in the large orifice chamber. When the ball is pressed, water comes out from the large orifice chamber due to internal pressure. The second method of tampering is carried out by loosening or removing the cowl covering the air valve by inserting rod or other tools. Still another method of tampering is to remove the nozzle of the small orifice air release valve.
Once the valves are tampered, it causes continuous leakage through the valve and hence leads to wastage of water through the pipe lines. The valves once tampered with are very difficult to repair and increases the cost of maintenance.
Several attempts have been made to manufacture kinetic air valves.
Accordingly, U.S. patent 5511577 discloses an air release valve for pipelines. The air release valve of U.S. patent 5511577 comprises a valve chamber having an inlet and an outlet. Inside the chamber there is provided a control float which is responsive to changes in liquid level in the chamber. There is also provided a stack of valve members in the chamber above the control float. The valve members have vent passages through them which increase in size with increasing height in the stack but which are smaller than the outlet. The top valve member in the stack is designed to be lifted up, by differential air pressures acting on it, to seat on the outlet and thereby reduce the effective size of the outlet when a pipeline is filled with liquid and the liquid displaces air through the valve. The air valve of U.S. patent 5511577 is not effective in preventing the tampering of the valves for

unauthorized withdrawal of water through the valve. The air vent passages can be easily damaged for removal of water.
Again, U.S. patent 4209032 discloses an air-relief valve for pipelines. A housing is provided having a large orifice at its upper end for releasing or admitting air when filling or emptying the water line to which it connected and a float formed with an axial bore. A first valve member having a depending stem disposed in the axial bore of the float. A small orifice is provided so as to communicate with the large orifice of the housing. A second valve member actuated by the float is provided such that when the float rises, it causes the second valve member to close the small orifice in the first valve member. The rising of the float also causes the first valve member to rise so as to close the large orifice in the housing. U.S. patent 4209032 does not provide effective means for preventing tampering of the valve for unauthorized withdrawal of water from the pipeline.
Thus, there was felt a need for providing an arrangement for preventing tampering of the kinetic air valves.
OBJECT OF THE INVENTION
An object of the present invention is to prevent tampering of the valves.
Another object of the present invention is to prevent leakage of water.
Still another object of the present invention is to increase the working life of air valves.

Yet another object of the present invention is to reduce the cost of maintenance.
SUMMARY OF THE INVENTION
In accordance with the present invention there is provided a tamper preventing arrangement for kinetic air valve having a high pressure chamber and a low pressure chamber, each chamber having a cover and an orifice ball, the arrangement comprising:
a. at least one socket head cap screw adapted to internally fit
the cover of the low pressure chamber and the high pressure
chamber to the low pressure chamber and the high pressure
chamber respectively;
b. a cowl having a tube formation adapted to be fitted to the
cover of the low pressure chamber, the tube formation being
provided with a cross-wire shaped formation; and
c. a high pressure nipple fitted to the cover of the high
pressure chamber, the high pressure nipple having a base
portion located within the high pressure chamber and a
threaded stud portion formed on the base portion.
Typically, the socket head cap screw is internally fitted within the low pressure chamber and high pressure chamber.
Typically, the threaded stud portion is adapted to project from the cover of the high pressure chamber.

BRIEF DESCRIPTION OF THE FIGURES
Other aspects of the invention will become apparent by consideration of the accompanying drawing and their description stated below, which is merely illustrative of a preferred embodiment of the invention and does not limit in any way the nature and scope of the invention.
Figure 1 illustrates a perspective view of the kinetic air valve in accordance with the present invention;
Figure 2 illustrates a sectional view of the kinetic air valve in accordance with the present invention;
Figure 3 illustrates a detail sectional view of the cowl of the low pressure chamber in accordance with the present invention;
Figure 4 illustrates the detailed sectional view of the cross-wire shaped formation in the cowl of the low pressure chamber in accordance with the present invention;
Figure 5 illustrates the detailed sectional view of the high pressure nipple of the high pressure chamber of the kinetic air valve; and
Figure 6 illustrates the observations after installation of the tamper preventing arrangement for kinetic air valve.

DETAILED DESCRIPTION
The invention will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.
Referring to the accompanied drawings, a tamper preventing arrangement for a kinetic air valve, in accordance with this invention is generally indicated by the reference numeral (10) and is particularly shown in figure 1 of the drawings. Figure 2 illustrates the sectional view of the tamper preventing arrangement for a kinetic air valve (10) in accordance with the present invention. The kinetic air valve (10) has high pressure chamber (14) and a low pressure chamber (12). The high pressure chamber (14) is provided with a high pressure orifice ball (26) and the low pressure chamber (12) is provided with a low pressure orifice ball (24).
In accordance with one aspect of the tamper preventing arrangement of the kinetic air valve (10), includes a plurality of hexagonal socket head cap screws (18), shown in figure 1. The hexagonal socket head cap screws (18) are typically single size hexagonal cap screws. The hexagonal socket head cap screws (18) are fitted from within the low pressure chamber (12) so as to prevent that the hexagonal cap screws (18) from being easily visible and identified. Special tool, typically Allen Key is used for assembling and maintenance of the kinetic air valve (10). The hexagonal cap screws (18) help in avoiding tampering of the cowl (16) of the low pressure chamber (12) with commonly available tools. The hexagonal cap screws (18) help in fixing of the cowl (16) and the high pressure cover (20) with valve body of the kinetic air valve (10).

In accordance with another aspect of the tamper preventing arrangement of the kinetic air valve (10), the low pressure chamber (12) is provided with a cowl (16), shown in figure 3. The cowl (16) is provided above a low pressure plate (not shown in figure) of the low pressure chamber (12). A tube formation (15) is formed on the cowl (16). The tube formation (15) of the cowl (16) is provided with a cross-wire shaped formation (28), shown in figure 4, to prevent unauthorized access to the low pressure orifice ball (24). The cowl (16) along with the tube formation (15) eliminates tampering of the kinetic air valve (10) caused by pressing the low pressure orifice ball (24) of the low pressure chamber (12).
In accordance with another aspect of the tamper preventing arrangement for kinetic air valve (10), a high pressure cover (20) with a high pressure nipple (22), shown in figure 5, is provided in the high pressure chamber (14). The high pressure nipple (22) is fitted from the inner side of the high pressure cover (20). The high pressure nipple (22) is provided with a threaded stud portion (31) formed on a base portion (30). The base portion (30) is located within the high pressure chamber (14) while the threaded stud portion (31) of the high pressure nipple (22) protrudes from the high pressure cover (20). Thus, the base portion (30) prevents the high pressure nipple (22) from being removed from the outside even in case the threaded stud portion (31) of the high pressure nipple (22) located outside the high pressure cover (20) is cut or damaged.

TEST CONDUCTED
Figure 6 illustrates the observation after installation of the tamper preventing arrangement for kinetic air valve over a period of 8 months. Periodic observation illustrates that there was no tampering caused to the valve and no leakage was detected.
TECHNICAL ADVANTAGES
The product as described herein above offers several advancements. The present invention helps in preventing the tampering of the air valve which leads to wastage of water from a pipeline while ensuring optimum usage of water which is a natural resource. The air valve of the present invention helps in reliable long term performance of valve. The air valve of the present invention helps in increasing the service life of the valve. The maintenance of the valve of the present invention can easily be carried out on site. Again the cost of maintenance of the air valve is minimal.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the invention. These and other changes in the preferred embodiment as well as other embodiments 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.

We Claim;
1. A tamper preventing arrangement for kinetic air valve having a high pressure chamber and a low pressure chamber, each chamber having a cover and an orifice ball, said arrangement comprising:
a. at least one socket head cap screw adapted to internally fit
the cover of the low pressure chamber and the high pressure
chamber to the low pressure chamber and the high pressure
«
chamber respectively;
b. a cowl having a tube formation adapted to be fitted to the
cover of the low pressure chamber, said tube formation
being provided with a cross-wire shaped formation; and
c. a high pressure nipple fitted to the cover of the high
pressure chamber, said high pressure nipple having a base
portion located within the high pressure chamber and a
threaded stud portion formed on said base portion.
2. The tamper preventing arrangement for kinetic air valve as claimed in claim 1, wherein said socket head cap screw is internally fitted within the low pressure chamber and the high pressure chamber.

3. The tamper preventing arrangement for kinetic air valve as claimed in claim 1, wherein said threaded stud portion is adapted to project from the cover of the high pressure chamber.