FORM 2
THE PATENTS ACT, 1970
(39 of 1970) & The Patents Rules, 2003
PROVISIONAL/COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION
Device to simulate and test the refueling valves on fighter aircraft
2. APPLICANT(S)
(a) NAME: HINDUSTAN AERONAUTICS LIMITED
(b) NATIONALITY: INDIAN
(c) ADDRESS: SM(PP-SUROH), Aircraft Overhaul Division, Nasik
3. PREAMBLE TO THE DESCRIPTION
PROVISIONAL The following COMPLETE The following specification
specification describes the particularly describes the invention and
invention. the manner in which is to be performed.
x I ^
4. DESCRIPTION (Description shall start from next stage.) Refer Annexure I
5. CLAIMS (Not applicable for provisional specification. Claims should start with fhe preamble - "I/We claim" on separate page)
Refer Annexure II
6. DATE AND SIGNATURE (to be given at the end of last page of specification)
7. ABSTRACT OF THE INVENTION (to be given along with complete specification on separate page)
Refer Annexure III
Note:-
*Repeat boxes in case of more than one entry.
*To be signed by the applicant(s) or by authorized registered patent agent.
*Name of the applicant should be given in full, family name in the
beginning.
*Complete address of the applicant should be given stating the postal index
no./code, state and country.
*Strike out the column(s) which is/are not applicable.

1 Title of the Invention
Device to Simulate and Test the Refueling Valves on Fighter Aircraft
2 Field of the Invention
The invention relates to electrical, mechanical and aerospace engineering in general and the specifically to fighter aircraft repair.
3 Background of the Invention
In fighter aircraft fuel systems, fuel is commonly pumped to fuel tanks of aircraft through fuel tankers on ground. Fuel systems enable fuel to be loaded, stored, managed and delivered to the engine as per the condition of aircraft. Fuel management system measures the fuel quantity available on an aircraft and rate at which fuel flows to the aircraft. Based on the specified operating conditions fuel management system operates the refueling valves, multiple refueling valves are used in a complex fuel management system of fighter aircraft for regulating the flow of fuel on different tanks of fighter aircraft as per the capacity and sequencing of fuelling.
Refueling valves is electrically driven electro-mechanism with an automated rotating drive used for remotely opening and closing of refueling valves. It is intended to work along with fuel management system of aircraft and as per desired electrical and mechanical condition of aircraft, the signal generated by fuel management system (i.e. opening or closing of valve) based on the position of refueling valves on fighter aircraft. As per the signal, electrically driven electro-mechanism of refueling valve has to move accurately, precisely to complete open or complete close position and also generate the feedback about its position to the fuel management system. In case of abnormality noticed by Fuel management system during operation of refueling valves, it is to be replace. The trial and error process is adopted for simulate and test the refueling valves on fighter aircraft and it is a tedious, time consuming and resource intensive process.

3.1 Prior Art
European patent EP 3020941: Aircraft fuel system, describes the general
design aspect of aircraft fuel systems and delivery of fuel by complex fuel
management system inside the aircraft. Though it is related to an aircraft
fuel system, it does not related to the present invention either on the scope
or on the functionality.
US patent US 10822119: Fuelling arrangement and method, describes a
method of fuelling an aircraft for a flight to a predetermined destination and
the general design aspect of aircraft fuel systems. Though it is related to an
aircraft fuel system, it does not related to the present invention either on the
scope or on the functionality.
US patent US 8844583: Refuel valve assembly and method for refuelling
an aircraft, is about refuelling valve assembly for refuelling an aircraft with
two or more tanks. It does not deal with control of valves during installation
on fighter aircraft and also testing of valve on aircraft.
4 Brief Summary of the Invention
The present invention is a portable device to simulate and test the refueling valves on fighter aircraft. ( i.e in situ of aircraft) used in fuel management system. Refueling valves are electrically driven electro-mechanism used in complex fuel system of fighter aircraft. This system is intended to work along with fuel management system of aircraft and as per desired electrical and mechanical condition of aircraft, the signal generated by fuel management system (i.e. opening or closing of valve) is based on the position of refueling valves on fighter aircraft. As per the signal, electrically driven electro-mechanism of refueling valve has to move accurately, precisely to complete open or complete close position and also generate the feedback about its position to the fuel management system. Refueling valve foremost consist of valve flap assembly coupled to electrical driven mechanism driven by motor.

The present invention deals with the innovative design of portable device for simulate and test the refueling valves on fighter aircraft used in complex fuel management system in a simple, less time consuming and with highly safer mode
5 Detail Description of the Drawings
The invention can be better understood by reading the detail description of
the disclosed embodiment followed by the accompanied drawings:
Figure 1: Schematic diagram of Device to simulate and test the
refueling valves on fighter aircraft.
Figure-2: Block diagram of device to simulate and test the refueling
valves on fighter aircraft.
Details of figure 1 & 2
1. Connecting Element-1
2. Connecting Element-2
3. Connecting Element-3
4. Connecting Element-4
5. Power Supply indication
6. Power Supply control
7. Selecting Element-1
8. Selecting Element-2
9. Selecting Element-3
10. Indicating Element-1
11. Indicating Element-2
12. Indicating Element-3
13. Indicating Element-4
14. Indicating Element-5
15. Indicating Element-6
16. Rotary Selecting Element
17. Measuring Element
18. Sealing

19. Electrical insulating casing
20. Device to control and test the fuelling valve of fighter aircraft
6 Detail Description of the Invention
Electrically driven refueling valve is an automated drive used for remotely opening and closing of refueling valves in complex fuel management systems on ground while refueling of aircraft. Refueling valves consist of two major assembly, a mechanical valve assembly and an electro-mechanism. Number of refueling valves is based on the design and quantity fuel tanks on the fighter aircraft. Present invention is a device to simulate and test the three refueling valves on fighter aircraft specifically. A full understanding of the invention can be gained, when wherein parts are referred by the numerals read in conjunction with;
Figure 1: Schematic diagram of Device to simulate and test the refueling valves on fighter aircraft.
Figure 2: Block diagram of device to simulate and test the refueling valves on fighter aircraft.
Device (20) simulate and test the three refueling valves on fighter aircraft consist of Connecting Element-1 (1) for connecting the device with the interface as per the complex fuel management systems of fighter aircraft, Connecting Element-2 (2) is a flexible loom for safer distance operation of device(20). Connecting Element-3 (3) and Connecting Element-4 (4) is connected with the source of ground power supply. The presence of power is indicated by Power Supply indication (5), Power Supply control (6) is used to control the power input to the refueling valve.
For simulating the refueling valve 1 on fighter aircraft, selecting element-1 (7) activates the refueling valve 1 in open or closed position as per the indicated by indicating element-1 (10) and indicating element-2 (11). Open condition is indicated by indicating element-1 (10) and closed position is indicated by indicating element-2 (11).

To test voltage drop across the electric circuit of refueling valve 1, Rotary Selecting Element (16) consist of rotating selector switch was internally connected with measuring element (17) on the device (20) for both open and closed position of refueling valve. When Rotary Selecting Element (16) is bring into voltage test of refueling valve 1, Voltage drop is indicated by indicating measuring element (17) on the device (20). For simulating the refueling valve 2 on fighter aircraft, selecting element-2
(8) activates the refueling valve 2 in open or closed position as per the
indicated by indicating element-3 (12) and indicating element-4 (13). Open
condition is indicated by indicating element-3 (12) and closed position is
indicated by indicating element-4 (13).
To test voltage drop across the electric circuit of refueling valve 2, Rotary Selecting Element (16) consist of rotating selector switch was internally connected with measuring element (17) on the device (20) for both open and closed position of refueling valve. When Rotary Selecting Element (16) is bring into voltage test of refueling valve 2, Voltage drop is indicated by indicating measuring element (17) on the device (20). For simulating the refueling valve 3 on fighter aircraft, selecting element-3
(9) activates the refueling valve 3 in open or closed position as per the
indicated by indicating element-5 (14) and indicating element-6 (15). Open
condition is indicated by indicating element-5 (14) and closed position is
indicated by indicating element-6 (15).
To test voltage drop across the electric circuit of refueling valve 3, Rotary Selecting Element (16) consist of rotating selector switch was internally connected with measuring element (17) on the device (20) for both open and closed position of refueling valve. When Rotary Selecting Element (16) is bring into voltage test of refueling valve 3, Voltage drop is indicated by indicating measuring element (17) on the device (20). All the electrical elements are connected through electrical wire as per figure No. 1 and figure No. 2.

Sealing compound (18) used for sealing the portable device and device casing is made of electrical insulating material (19). The sealed portable device (20) specific operates the refueling valve and indicate the open or close position of refueling valves in a highly safer mode and also test the refueling valves on aircraft in case of abnormality. The sealed portable device is portable and simple to use.

Figure 1

Figure-2

Title: Device to simulate and test the refueling valves on fighter aircraft
Claims
We Claim,
1. A device (20) to simulate and test the refueling valves on fighter aircraft comprising;
Connecting element-1(1) and connecting element-2 (2) for
connecting the refueling valves on fighter aircraft with device (20);
Connecting element-3 (3), connecting element-4 (4), Power Supply
indication (5) and power supply control (6) for connecting device
(20) with input power supply;
Rotary Selecting Element (16) and measuring element (17) for
testing the voltage drop across the electric circuit of refueling
valves;
Selecting element-1 (7), selecting element-2 (8) and selecting
element-3(9) for feeding the electrical power to the refueling valves
on fighter aircraft; and
Indicating element-1 (10), indicating element-2 (11), indicating
element-4 (12), indicating element-5 (13), indicating element-6 (14)
and Indicating element-6 (15) for indicating the position of refueling
valve on the device (20).
2. The device (20) claimed in Claim-1, Sealing compound (18) used for sealing the device (20) improve the safety condition.
3. The device (20) claimed in Claim-1, made of Electrical insulating casing (19) electrical insulating material improve the safety condition and portable to operate.