Claims:1. A window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising:
an opening to form a window in the stuck window glass;
a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius;
a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window;
a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel,
wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously.

2. The window assembly as claimed in claim 1, wherein said U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length.

3. The window assembly as claimed in claim 1, wherein said channel has plurality of opening in the lower arm to drain out the accumulated water through the water path guides.

4. The window assembly as claimed in claim 3, wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means.

5. The window assembly as claimed in claim 1, wherein said channel is designed to hold a liner material to retain and secured against glass siding forces.

6. The window assembly as claimed in claim 1, wherein said channel is designed to hold a liner material to allow minimal sliding force as well as give water tight sealing on sliding glass.

7. The window assembly as claimed in claim 1, wherein the sliding window gets locked automatically with a window latch designed to function smooth lock.
8. The window assembly as claimed in claim 6, wherein the latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

9. The window assembly as claimed in claim 1, wherein said assembly is not having any protrusion outside.

10. A window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising:
an opening to form a window in the stuck window glass;
a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius;
a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window;
a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel,
wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means.

11. The window assembly as claimed in claim 10, wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously.

12. The window assembly as claimed in claim 10, wherein said U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length.

13. The window assembly as claimed in claim 10, wherein said channel is designed to hold a liner material to retain and secured against glass siding forces.

14. The window assembly as claimed in claim 10, wherein said channel is designed to hold a liner material to allow minimal sliding force as well as give watertight sealing on sliding glass.

15. The window assembly as claimed in claim 10, wherein the sliding window gets locked automatically with a window latch designed to function smooth lock.

16. The window assembly as claimed in claim 15, wherein the latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

17. The window assembly as claimed in claim 10, wherein said assembly is not having any protrusion outside.

18. A window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising:
an opening to form a window in the stuck window glass;
a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius;
a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window;
a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel,
wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously, and wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means.

19. The window assembly as claimed in claim 18, wherein said U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length.

20. The window assembly as claimed in claim 18, wherein said channel is designed to hold a liner material to retain and secured against glass siding forces.

21. The window assembly as claimed in claim 18, wherein said channel is designed to hold a liner material to allow minimal sliding force as well as give water tight sealing on sliding glass.

22. The window assembly as claimed in claim 18, wherein the sliding window gets locked automatically with a window latch designed to function smooth lock.

23. The window assembly as claimed in claim 22, wherein the latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

24. The window assembly as claimed in claim 18, wherein said assembly is not having any protrusion outside.
, Description:Field of the Invention
This invention, in general relates to field of automobiles. More specifically, the present invention provides a window assembly enabling open the window & get fresh air as well as managing the leakage of AC effectively in stuck glass of vehicle.

Background of the Invention
Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the present invention, or that any publication specifically or implicitly referenced is prior art.

Generally, in Tropical countries, the passenger cars and vans are seen with windows having rolling mechanism for glass. This is either a mechanical winding arrangement or automated arrangement aka power window. In passenger vehicles -vans or buses the window glasses are preferred to be sliding in channel shaped guide ways.

In current Market we have only 2 type of Scope i.e. for Non-A/C a Regular Sliding window with Aluminium Chanel or for AC Vehicle Stuck Glasses. In case of Ac failure with stuck glass window there is no ventilation which causes suffocation & in hilly areas there is potential that few peoples may have Nausea and may need fresh Air.

The glass thus provides free way for breeze to keep the cabins ventilated, unless vehicle is air conditioned.

The latest trend is to avoid moving glass in the window using pasted window glasses on the body. ( If it is required for some specific reason, alternate arrangement of intake / exhaust of air needs to be installed. It also calls for interlocking systems to ensure that Intake / exhuast openings are air tight when A/c is functioning . Thus only one out of two, either the A/c or intake exhaust system is operatable at a time).There are various works done in this direction.

JP2006151165 (A) discloses a water draining structure for a window glass of a vehicle capable of enlarging the size of a direct view window while the inner glass of the direct view window is prevented from attachment of water. The water draining structure of the window glass is equipped with the window glass of whole area rising and falling type held over the direct view window consisting of an inner glass and outer glass mounted on an inner panel and outer panel of each vehicle door whose waist line is inclined down forward and able to rise and fall between the inner glass and the outer glass along a front and a rear channel-shaped guide member installed upright inside the door, a seal member attached to each guide member and forming a water draining path inside the guide member while it is in slide contact with the side of the window glass, and a splash preventing member mounted at the bottom of the window glass and preventing the water flowing down along the window glass from splashing in the direction of the inner glass.

US3050332 discloses a window and window frame structure wherein the window frame structure is adapted to be operatively connected to a window regulator mechanism and window guiding means and includes means for adjusting the window within a window opening simultaneously with respect to both the window regulator mechanism and the window guiding means without requiring any adjustment of the mechanism or of the guiding means with respect to the support thereof.

DE102010006443 discloses a vehicle window glass mounted in a vehicle component and movable to open and close a window is disclosed. The window glass may comprise a generally vertical first side edge; a generally vertical second side edge in opposed relation to the first side edge; and a bottom edge extending between the first side edge and the second side edge and including a first downward sloping portion extending from the first side edge in a downward sloping direction and a first drip notch recessed into the bottom edge along the first downward sloping portion, whereby water wicking along the first downward sloping portion of the bottom edge will drop from the window glass when the water makes contact with the first drip notch.

US3452477 discloses A shutter assembly for use on an exterior wall surface at a window opening or the like comprising a plurality of horizontally reciprocable pairs of apertured shutters restrained in reciprocable movement by guide rails, and moveable in relatively smooth relative reciprocation by a pair of opposed gear racks respectively connected to at least one pair of shutters and operated by a transversely disposed shaft including a pinion meshed with the gear racks, and in which the gear racks and pinions are disposed in a hollow chamber generally below the path of travel of the shutters, and in which the chamber opens outwardly and is closed by a displaceable access panel.

However, many challenges are still there. On one hand it provides perfect sealing (air tight) to increase the air-conditioning effect and avoids risk of temperature variations, while on other hand it causes big issue of ventilation in closed (air tight ) vehicle, in case of failures of air-conditioner itself.

Some solutions are provided where two way fans have been introduced allowing air intake or exhaust, however this solution does not facilitate the “air tight “feature for air-conditioned vehicle.

Therefore, it is important to work on alternative system and method to provide a window assembly within stuck window to provide proper AC cooling along with ventilation as and when required and also keep the aesthetic right.

Summary of the Invention
The various objectives and embodiments of the present invention as presented herein are understood to be illustrative of the present invention and not restrictive thereof and are non-limiting with respect to the scope of the invention.

It is a primary objective of the present invention is to provide a window which will give advantage of stuck glass (Exterior look & reduce leakage of AC) & sliding window (freedom to open the window & get fresh air).

It is another objective of the present invention to provide a window with clean glass finish from outside while have facility to open when required.

Yet another objective of the present invention is to provide a leak proof window with good look which serves the both the purpose of fresh air in case of Ac failure.

Still another objective of the present invention to provide a window in window wherein there is no protrusion outside therefore avoid any hazards for other vehicle running on road.

Still another objective of the present invention to provide window in window without compromising the aesthetics of the vehicle.

Yet another objective of the present invention to provide an innovative drainage system in window in window assembly to prevent water leakage.

The above and other objectives of the present invention are achieved according to the following embodiments of the present invention. However, the disclosed embodiments are exemplary based on the preferred and best mode of the invention and not limit the scope of the present invention.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein said U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein said channel has plurality of opening in the lower arm to drain out the accumulated water through the water path guides and wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, The window assembly as claimed in claim 1, wherein said channel is designed to hold a liner material to retain and secured against glass siding forces, wherein said channel is designed to hold a liner material to allow minimal sliding force as well as give water tight sealing on sliding glass and wherein the sliding window gets locked automatically with a window latch designed to function smooth lock and wherein the latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in an AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in an AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means, wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously and wherein said U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in an AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means, wherein said channel is designed to hold a liner material to retain and secured against glass siding forces and wherein said channel is designed to hold a liner material to allow minimal sliding force as well as give water tight sealing on sliding glass.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in an AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means, wherein the sliding window gets locked automatically with a window latch designed to function smooth lock and wherein the latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously, and wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously, and wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means, wherein said U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length and wherein said channel is designed to hold a liner material to retain and secured against glass siding forces and allow minimal sliding force as well as give water tight sealing on sliding glass.

In accordance with one embodiment of the present invention, there is provided a window assembly within a stuck glass window for use in a AC vehicle, said window assembly comprising an opening to form a window in the stuck window glass, a U shape preformed channel on to the stuck window glass adapted to slide a glass having varying radius at two places corresponding to the stuck window glass radius, a window glass adapted to be operatively slide on the channel having different radius on the top and bottom edge of the glass corresponding to the channel to suitably close the window, a stopper designed at the other end of the channel adapted to limit the sliding glass stroke preventing it to come out from said channel, wherein bending of the channel is done through higher side of section without forming wrinkles on face employing a special machine enabling the U Frame of unequal radius simultaneously, and wherein said channel has plurality of opening in the bottom arm to drain out the accumulated water through the water path guides wherein said plurality of holes are operatively connected with water path guide means enable to guide the remaining drip to drain out via deflector connected with the water path guide means, wherein the sliding window gets locked automatically with a window latch designed to function smooth lock and wherein the latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

These and other embodiments, processes and features of the invention will become more fully apparent when the following detailed description is read with the accompanying drawing figures. However, both the foregoing summary of the invention and the following detailed description of it represent one potential embodiment and are not restrictive of the invention or other alternate embodiments of the invention.

Brief Description of the accompanying Drawings
The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

Figure 1 illustrate the windows assly with sliding glass in fully closed condition
Figure 2 illustrate the window assly with sliding glass in partially open condition
Figure 3 illustrate the windows assly with sliding glass in fully open condition
Figure 4 illustrate an elevation view of special purpose machine (SPM)

Figure 5& 6illustrate a side view of special purpose machine (SPM) detailing split roller and atop reloaded arrangement.
Figure 7illustrates a general view of SPM showing a section bending mechanism

Detailed Description of the Invention
The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure.

Various terms as used herein are shown below. To the extent a term used in a disclosure is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.

According to the present invention an optimized window has been developed with the objective that it is able to serve 2-in-1 function thus solving the problem being faced in case of stuck glass window at the time of an AC failure, passengers sitting inside the vehicle might feel suffocated or symptoms such as nausea can be seen in hilly areas.

The present invention discloses a very unique structure of a window which is an amalgamation of a leak proof and a slidable window, thus serving the purpose of an AC vehicle and the same window can be slid in case of an AC failure and passengers can get fresh air from outside thus it is capable of avoiding symptoms such as suffocations and nausea in hilly region.

The glasses herein according to the present invention are affixed into an aluminium frame and they are sealed using betamate sealant which is to be applied on top and bottom sides of aluminium frame to make it leak proof and give a good exterior look.

The entire system herein the present invention is mounted on PU FOAM self-adhesive surfaces over which it can be slide smoothly according to the requirement. This system is giving an advantage of stuck glass and sliding window in one window while technical advancement being the use of combination of leak proof and sliding features of the window in one window. Further, a separate water path has been designed which is to be drained out in case of any water leakage.

Advantage of the present invention is to obviate the drawback associated with the existing arts and provide a window assembly within stuck glass window of a AC vehicle, wherein the assembly comprises a glass window slidably fixed at the channel on the stuck glass window of the vehicle, wherein said channel is U shaped operatively fixed inside of the inner side of stuck glass window and having different radius at the top and bottom channel corresponding to the radius of base window glass. The top and bottom channel is absolutely parallel to each other wherein front side of channel is curved corresponding to window glass front edge which enable leak proof and smooth locking employing a customised latch. Further, the bottom channel is having plurality of holes which are operatively connected with the guide means to enable water drain out from vehicle.

The drainage system according to the present invention, wherein the lower arm of channel (102)is having plurality of holes which are operably connected with a water drainage guide. Referring figure 1 the rain water or water during vehicle washing gets on outer surface of Glass (105) is restricted to enter in the channel (102) due to Liner material (111) placed in it. Although the Liner material (111) is designed to arrest max water ingress, yet after prolonged use small droplets are likely to inter in channel through the sealing material. Outlets are provided in the channel lower arm at appropriate positions and seal has opening at the bottom portion at respective outlets in the channel. The water drained from the outlets, get channelized systematically through the polyamide drainage guide pasted exactly below the outlet opening in the lower arm of channel (102).

Referring Figures 1, the pasted window glass (100) is made with suitable opening (113) (Figure3) to form a window in the base window glass, wherein the window glass in fully open condition. The location of cut out is closely maintained with respect to basic curved glass(100)overall profile. This is state of art process as the opening is finely finished to provide smooth rounded off edges all over, eliminating accidental bruises to passengers travelling in the vehicle. The glass (100) is made dark on borders(109)to give a look of two windows in it-one is with through opening(113) Fig 3 and other is transparent see-through area(114) fig 1. The basic curved glass (100) Fig 1 is stuck on body well located using polyamide locators (107)Fig 1 using suitable Polyurethane sealing compound all over periphery, to make the joint air and water tight.

Referring to Figure 1 the state of art “U shape”(102)preformed channel made from nonferrous anti rusting material is pasted to basic curved Glass inner surface (101) with special compound(110)with high bonding strength. This is an innovative idea to meet the requirements of perfect adhesion to curved glass(100). The basic glass(100) would have large radius in two planes thus the same profile needs to be provided on the “U Frame”. Next critical part is precision location of U frame on basic curved glass (100) with respect to opening provided in it. The height to thickness ratio is almost over 1:1.63 thus bending of the channel is done on special machine (General View of Machine)specifically manufactured to perform this operation. This machine makes both bends of U Frame of unequal radius simultaneously Ref Fig 4. Bending section (402) through higher side of section without forming wrinkles on face is state of the art process. It uses split roller (406) fig 6 and auto preload mechanism (407) fig 6 even though the inner profile projections in section (102) Fig 1 makes it further difficult to give external Ironing force while bending.

The term ‘Basic glass’ and ‘ curved glass’ are having similar meaning, wherein basic glass has curved shape matching to vehicle body curvature in two directions i.e. first is Top to bottom when vehicle is seen from rear or front and another is front to rear when seen from top.

The U shape channel arms are perfectly parallel to each other to take up sliding glass and allow uniform sliding over full length. The design of U shape frame in polyamide material is also possible with advance injection moulding expensive dies. The U frame is required to be made in LH and RH version hence two separate injection moulding dies are required for polyamide version. Design of the channel inner profile is such to hold the liner material(111) Fig 1 in exact place and retain it secured against glass siding forces. The liner is designed to allow minimal sliding force as well as give water tight sealing on sliding glass 112 (Figure 1).

The U channel ends are closed with suitable polyamide parts which act as stoppers(106) (Figure 1 & 2) to limit the sliding glass stroke preventing it to come out from the U Chanel. The U channel has opening in the bottom arm to drain out the accumulated water through the water path guides(104) (Figure 1). Further, the base profile plate used in SPM (405) Fig 6 corresponding to Inner profile of U bend frame is prepared considering the spring back factor. The Straight section (402) Fig 4 is placed on Base Profile Plate passing through roller assly (406) Fig 6. The rollers on both sides are actuated with hydraulic cylinders (403, 403.1) Fig 4 bending the section to form U frame. The U frame is ejected with ejection mechanism (404) Fig 4. The final U frame (401) Fig 4 is pushed Upwards to eject it out. The wrinkles in section are eliminated in bending process completely. The rollover pulleys (406) Fig 6 are made with split construction. An auto preload mechanism(407) Fig 6 is housed in the split pulley assly. This gives adequate positive force on the section giving ironing effect on flanges. Further, the U frame is bend slightly to achieve the matching profile of window glass. Thus, special purpose machine (SPM) designed for U bend frame ensures the parallality of legs, simultaneous bending of section, providing precise corner radius at both corners and give matching radius on frame to suit the window glass.

At the end of closing stroke, the sliding window gets locked automatically with the special feature provided on the window latch 103 (Figure 1).The sliding glass can be taken at other end only after putting a pinching force together with opening force (refer Figure 2). This latch is specially designed to function smooth without making any crackling sound. The latch has a part fixed on the sliding glass with backup plate ensuring leak proof joint to arrest water entry through mounting holes in the glass.

It will be appreciated by those skilled in the art that the foregoing description was in respect of preferred embodiments and that various alterations and modifications are possible within the broad scope of the appended claims without departing from the spirit of the invention with the necessary modifications.

Based on the description of disclosed embodiments, persons skilled in the art can implement or apply the present disclosure. Various modifications of the embodiments are apparent to persons skilled in the art, and general principles defined in the specification can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments in the specification but intends to cover the most extensive scope consistent with the principle and the novel features disclosed in the specification.