DESC:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patent Rules, 2003
COMPLETE SPECIFICATION
(See sections 10 & rule 13)
1. TITLE OF THE INVENTION
A SYSTEM AND METHOD FOR WATER TIGHT OPENING FOR ACCESSING EXTERIOR DEVICES FOR CABIN CREW IN VEHICLE
2. APPLICANT (S)
NAME NATIONALITY ADDRESS
BEML LIMITED IN BEML Soudha, No 23/1, 4th Main S.R. Nagar, Bengaluru- 560027, Karnataka, India.
3. PREAMBLE TO THE DESCRIPTION
COMPLETE SPECIFICATION

The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF INVENTION:
[001] The present invention relates to the field of leakage prevention device. The present invention in particular relates to a system and method for water tight opening for accessing exterior devices for cabin crew in vehicle.
DESCRIPTION OF THE RELATED ART:
[002] The existing cabin side openings in the train are mostly slide type and projects to outside on opening. Such assemblies have lot of issues w.r.t dust accumulation, cleaning and maintainability. The outside projected opening panel may interfere with the positioned PSD. The opening should be designed to protect all the equipment’s from damage by restricting the outside water to enter inside the train. It is very essential to stop the water entering the cabin area during the rainy season. Water ingress through the opening may damage the electronic equipment’s which are directly related to the safety of the passengers in the mass transportations systems viz:
1. Public announcement system: The system may get damaged electronically, if the water enters the equipment. This will lead to the failure of the announcement systems.
2. Signaling system failure: the presence of excess moisture in the electronic equipment of the signaling system which are mostly electronic devices will cause system to fail. This may cause accidents in the rails systems and disruption in the operations.
3. Platform devices: Some of the equipment’s are installed on the platform like platform screen doors etc. This equipment’s to be accessed by the crew in order to operate them whenever required. The platform screen door to be accessed by the crew during the emergency when the external doors are not opening due to technical problem. The crew member will access the doors operating panel through this opening. Hence, passengers can de-board the train.
[003] Reference may be made to the following:
[004] Publication No. CN208430898 relates to a skylight lock of excavator driver's cabin, including the driver's cabin, rectangular mouth has been seted up to the upper end of driver's cabin, there is the closing plate on the upper end right side of driver's cabin through hinge, the lower extreme left side fixedly connected with fixed block of closing plate, the fixed slot has been seted up to the lower extreme of fixed block, the right side notch department of fixed slot has seted up the mounting groove, be equipped with L type pole in the mounting groove, the department of buckling of L type pole rotates with the mounting groove through the pivot and is connected, the one end that the department of buckling was kept away from to the horizontal part of L type pole extends to the inside of fixed slot, T type spout has been seted up on the vertical portion right side of L type pole, sliding connection has T type slider in the T type spout. The utility model discloses, can increase the skylight locking dynamics in when locking lock, increase the leak proof ness between skylight closing plate and the driver's cabin, prevent that rainwater and dust from entering into the driver's cabin inside, the while has also reduced the noise of oscillation. In this invention assembly open to outside as L type of opening provided in the inner frame whereas in the present invention the opening opens up inside.
[005] Publication No. CN204956656 relates to a commercial car driver's cabin rear windshield where the river from through the rain water is guided through the V type groove which guides the water to the backside panel. The publication is suited only to the opening having small area and not to the area where the crew will utilize the opening to access the outside equipment. The publication explains the V type guide which can accumulate the small amount of rain water collected through the small opening however may not be self-sufficient for the large area openings as covered in the present invention.
[006] Publication No. CN208430570 relates to a rain -proof structure in excavator driver's cabin having a bearing assembly and a slider. In the present invention assembly, the sliding type of structure is avoided to overcome the maintenance issues arising due to the sliders.
[007] Publication No. CN207331806 explains the driver cab window which have a slope of 30 degrees inside which explains that the window opens up towards outside. In the present invention, the opening opens up inside which is a different invention from the mentioned publication.
[008] Publication No. CN206679085 relates to a driver's cabin subassembly, including A post, door and door and window glass, wherein, the A post includes the outer panel beating of A post, the interior panel beating of A post and A post reinforcing plate, and A post reinforcing plate includes fixed connection's top linkage segment, laminating section, parallel section and end linkage along with panel beating in the door, the outer panel beating of door and U -shaped car door pillar, adhesive tape and the door in the outside at the middle part of the outer panel beating of A post. The publication has so many parts which makes the assembly very complicated. The assembly uses adhesive tape which has its defined self-life. Hence the assembly may give up after some time in the running vehicles which may cause the damage the interior equipment’s. In the present invention, there are no components used which have effect in case of any failure.
[009] Publication No. CN204688113 specifies a pipe in the cabin crew for intake of the oxygen, the pipe is water tight. In the present invention it a openable water prevention device which will allow the cabin crew access to outside equipment’s and also restrict the water ingress when its closed. Both the patents have a difference functionality and serve different purpose.
[010] Thus, if rainwater ingress into driver cabin can damage all controlling electronic equipment. The damage of train controlling electronic equipment may cause issues like
(i) Failure of communication with train control center
(ii) Malfunctioning of lighting system
(iii) Malfunctioning door system and HVAC system
(iv) Malfunctioning of brake system and passenger safety will be at risk.
[011] The existing designs projects outside or slides over the fixed frame. The slid able assemblies have lot of issues of dust accumulation, cleaning and maintainability. Many times it has been observed that the slid able openings have the water leakage issues which creates failure of electronic equipment inside the cab.
[012] In order to overcome above listed prior art, the present invention aims to provide a system and method for water tight opening for accessing exterior devices for cabin crew in vehicle. The invention avoids any rainwater ingress into driver cabin of train and thereby to protect all train controlling electronic equipment.
OBJECTS OF THE INVENTION:
[013] The principal object of the present invention is to provide a system and method for water tight opening for accessing exterior devices for cabin crew in vehicle.
[014] Another object of the present invention is to provide a system to avoid any rainwater ingress into driver cabin of train and thereby to protect all train controlling electronic equipment.
SUMMARY OF THE INVENTION:
[015] The present invention relates to a system and method for water tight opening for accessing exterior devices for cabin crew in vehicle like EMU. The platform screen doors (PSD) provide access to commuters to board the train and block the path to railway tracks area in absence of a train in the railway station. The platform screen doors are designed in such a way, the PSD will operate in consequent to the temporary halting of train in the station. The PSD doors slide apart and exactly coincides in parallel with the doorway of the train to facilitate the boarding and alighting of commuters. There are some chances, where doorway of metro train and PSD doesn’t coincide in parallel. Due to this, the platform door doesn’t open at all, in such cases the cabin crew can open the PSD using key through a triangular window with opening/closing panel provided in the train by hand.
[016] The rain water may ingress through the triangular window provided on train cabin to access control panel of PSD. The water ingress needs to be arrested effectively to protect all train controlling electronic equipment housed in cabin.
BREIF DESCRIPTION OF THE INVENTION
[017] It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments.
[018] Figure 1 shows water tight opening for accessing exterior devices for cabin crew in vehicle;
[019] Figure 2 shows flowchart according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION:
[020] The present invention provides to a system and method for water tight opening for accessing exterior devices for cabin crew in vehicle like EMU. The platform screen doors (PSD) provide access to commuters to board the train and block the path to railway tracks area in absence of a train in the railway station. The platform screen doors (PSD) will operate in consequent to the temporary halting of train in the station. The PSD doors slide apart and exactly coincides in parallel with the doorway of the train to facilitate the boarding and alighting of commuters. There are some chances, where doorway of metro train and PSD doesn’t coincide in parallel. Due to this, the platform door doesn’t open at all, in such cases the cabin crew can open the PSD using key through a triangular window with opening/closing panel provided in the train by hand. Figure 1 shows water tight opening for accessing exterior devices for cabin crew in vehicle comprising outer frame (1), inner frame (2), hinge (3), lock (4), rubber seal (5), lock bracket (6), water collector strip (7), strip pasting adhesive (8), water discharge hole (9) and sealing air spurt hole (10).
[021] The rain water may ingress through the triangular window provided on train cabin to access control panel of PSD. The water ingress needs to be arrested effectively to protect all train controlling electronic equipment housed in cabin.
[022] In this invention a special kind of aluminum profile is provided. The aluminium profile is incorporated with obstructions to resist the flow of water by blocking its path. Also, the Aluminium profile is provided with the slot in that which help in fixing the rubber breeding to it without any adhesive. The Aluminium profile which restricts the entry of rainwater/liquid into driver cabin of train and also a rubber beading with the blind hole, provided on aluminum frame. The invention ensures a water leak-proof system for the triangular window. The invention avoids any rainwater ingress into driver cabin of train and thereby to protect all train controlling electronic equipment.
[023] Opening for accessing exterior devices for cabin crew/ pilot satisfies the requirement of the train operations like accessing the exterior equipment and avoid water ingress inside the cab area through this opening. This is done so that the outside equipment is fully and clearly visible to the train pilot when the provided opening is locked and is easily accessible when the opening is opened. The inner aesthetics matches with the cab interiors and outer skin matches with the exterior in order to retain the aesthetics of the train.
[024] The outer profile of the opening is Aluminum extrusion and cross section is so decided to provide maximum obstruction to the path of water flow Extrusion produces the precise part and reduces the weight of the assembly. Small holes are added to the outer frame of the assembly in such a way that if the water enters the cab while opening the inner frame will be forced out automatically.
[025] Rubber sealing is placed between the inner and the outer frame of the opening in order to make the assembly water tight. The rubber profile is provided with a blind opening in order to leak the entrapped air inside the rubber profile while the assembly in closed position. The present invention also allows the rubber to occupy the shape due to the present of the blind holes. Hence, when the opening is closed the entrapped air leaks out of the hole and butt the rubber surface and the metal surface perfectly.
[026] This assembly is opens into the cabin. The present invention also allows the rubber to occupy the shape due to the present of the blind holes. Hence, when the opening is closed the entrapped air leaks out of the hole and butt the rubber surface and the metal surface perfectly. The tiny holes present at the bottom of the assembly allow the entrapped water to leak outside making the assembly waterproof.
[027] The inside cab pressure is utilized through the entrapped water outside. Also, the CFD tool is used to analyze the entrapped air released when the opening is closed. The present invention also allows the rubber to occupy the shape due to the present of the blind holes on its profiles. Hence, when the opening is closed the entrapped air leaks out of the hole and butt the rubber surface and the metal surface closing the water ingress path. The tiny holes present at the bottom of the assembly allow the entrapped water to leak outside by utilizing the cab pressure.
[028] The present assembly opens into the cabin of train driver, hence interference of window opening panel with the already positioned PSD is ruled out as the train embarks the platform. The assembly is also maintenance free and do not have any issues like dust accumulation and cleaning.
[029] In the present invention, blind hole is made in the rubber to take the required shape of the frame in order to restrict the flow of water. Two holes are made in the outer frame of the assembly in order to force the water outside the cab by utilizing the inside pressure, if water get stagnated while opening the assembly.
[030] The present invention is a lighter assembly as only few parts are present in the assembly made through the special Al extrusions. This is about inside openable assembly having the advantages of reduced maintenance by avoiding dust accumulation and by eliminating the slid able parts in the invention.
[031] Figure 2 shows flow chart for design and development of water tight opening for accessing exterior devices for cabin crew in EMU’S.
[032] Step1. The requirements of the driver’s cab were analyzed thoroughly and found that the space required for fitting the window is very minimal. Also, there were requirements like the side view shall be clearly visible by the train pilot. The design features of the assembly have been conceptualized in BEML Ltd. The existing assemblies were checked and found not suiting the requirements.
[033] Step2. With the inflow of the basic vehicle information, 3D model is generated by considering following aspects
1. Crew member’s visibility from the opening
2. Crew member’s accessibility for the exterior equipment’s from the opening in seated position
3. Water tightness requirement
4. Noise suppression requirement.
[034] Preliminary analysis is done to check the overall shape and size of the opening.
[035] Step3. Detailed Design Review and Analysis report is prepared after analyzing static and dynamic behavior of the assembly with all the possible pressure of the water like washing plant and rain environment acting on the assembly.
[036] Step4. The assembly is checked for the manufacturing feasibility and the sample of the opening is prepared.
[037] Step5. Jigs and fixtures are prepared for the opening for checking against the water ingress. The set up is prepared for the water testing with more than 2 bar pressure.
[038] Step6. The opening is than checked for water tightness in the jig. The process is repeated many times and repeatedly opening and closing the assembly for the required operations. The rubber is also checked for the leakage by applying dye and observing the printed marks.
[039] Step7. Finally, the assembly is fitted in the train and checked for all the design aspects.
(i) In the present invention, blind hole is made in the rubber to take the required shape of the frame in order to restrict the flow of water.
(ii) The present invention, two holes are made in the outer frame of the assembly in order to force the water outside the cab by utilizing the inside pressure, if water get stagnated while opening the assembly.
(iii) The present invention is a lighter assembly as only few parts are present in the assembly made through the special Al extrusions.
(iv) The present invention is about inside openable assembly having the advantages of reduced maintenance by avoiding dust accumulation and by eliminating the slid able parts in the invention.
[040] Numerous modifications and adaptations of the system of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the true spirit and scope of this invention.
,CLAIMS:WE CLAIM:
1. A system and method for water tight opening for accessing exterior devices for cabin crew in vehicle comprises-
a) outer frame (1), inner frame (2), hinge (3), lock (4), rubber seal (5), lock bracket (6), and water collector strip (7);
b) aluminum profile incorporated with projections so that the straight water flow path is blocked and a slot for fixing the rubber breeding to it without any adhesive which restricts the entry of rainwater/liquid into driver cabin of train with a rubber beading with the blind hole (9), provided on aluminum frame wherein rubber occupies the shape due to the present of the blind holes and when the opening is closed the entrapped air leaks out of the hole (9) and butt the rubber surface and the metal surface perfectly;
c) water discharge hole (9) and sealing air spurt hole (10) wherein holes present at the bottom of the assembly allow the entrapped water to leak outside by utilizing the cab pressure characterized in that blind hole made in the rubber to take the required shape of the frame in order to restrict the flow of water and two holes are made in the outer frame of the assembly in order to force the water outside the cab by utilizing the inside pressure, if water get stagnated while opening the assembly.
2. The system and method for water tight opening for accessing exterior devices for cabin crew in vehicle, as claimed in claim 1, wherein the rubber occupies the shape due to the present of the blind holes.