Claims:CLAIMS
We claim:
1. A fluid level indicator assembly (2000) for hydraulic braking system comprising:
• a fluid level indicating housing (106),
• a floater (112) with a floater holder (110) and a floater cover (114),
• a wire harness with terminal assembly (116) having terminals (120),
• a cap structure (126),
wherein said cap structure (126) is a three piece structure comprises a cap upper body (100), a cap lower body (102) along with said fluid level indicating housing (106) placed inside said cap structure (126).
2. The fluid level indicator assembly (2000) for hydraulic braking system as claimed in claim 1, wherein said cap upper body (100) is press fitted with fluid level indicating housing (106) in a groove for press fit (138).
3. The fluid level indicator assembly (2000) for hydraulic braking system as claimed in claim 1, wherein said wire harness with terminal assembly (116) with said terminals (120) are placed on fluid level indicating housing (106).
4. The fluid level indicator assembly (2000) for hydraulic braking system as claimed in claim 1, wherein a slot (134) in said cap upper body (100) acts as locking arrangement along with a projection (122) provided in said fluid level indicating housing (106).
5. The fluid level indicator assembly (2000) for hydraulic braking system as claimed in claim 1, wherein said cap upper body (100) has slot (136) which is placed at right angles to the wire exit (124) and the wire is taken from said wire exit (124) to said slot (136) to said wire harness with terminal assembly (116).
6. The fluid level indicator assembly (2000) for hydraulic braking system as claimed in claim 1, wherein said cap upper body (100) is made of more flexible polymer than that of said cap lower body (102).
7. The fluid level indicator assembly (2000) for hydraulic braking system as claimed in claim 1, wherein said fluid level indicating housing (106) is to be used in three wheelers.

, Description:FIELD OF INVENTION
The present invention relates to a fluid level indicator assembly used in hydraulic braking system of motor vehicles. More particularly, the present invention relates to fluid level indicating assembly of the brake fluid reservoir to be used in motor vehicles, specifically for three wheelers.
BACKGROUND OF INVENTION
A brake fluid level indicator is used in almost all motor vehicles utilizing hydraulic brake system for the purpose of monitoring the brake fluid level. When the fluid goes beyond a minimum value the communication is sent to the driver by means of an indicating mechanism. The sensing of the fluid level is typically composed of wire harness terminals and a float mechanism whose movement is directed by the level of fluid in the cylinder and thereby indicating the lowering of fluid level.
Generally the fluid level indicator communicates with the master cylinder via brake lines or else it is integrated with the reservoir directly. Yet different vehicle makes different fluid level sensors. In the motor vehicles, either the geometry of the brake fluid reservoir or the electrical system differs between models. In three wheelers the fluid level indicator is positioned adjacent to the brake pedal. In such three wheelers, the fluid level indicator comes with quarter turn caps which has high tendency of dismantling due to leg movement of driver of the vehicle.
In the prior art US4805668, the brake fluid level indicator is integrated with the master cylinder. The level indicator has threaded cap structure which can be screwed with an internal thread to seal the fill connector. It also has a floater arrangement which indicates the minimum level of oil in the housing and thereby sends signals to the driver of the vehicle regarding the drop down of the oil level. But the said prior art does not have arrangement to prevent fault signalling or there is also no separate level indicating housing arrangement.
Another prior art US4500761 has a fluid reservoir with a fluid-level sensor consisting of two separate but co-operative rods. The rods are coaxial and free to move downward far enough to push the float to below. The reservoir cap is not threaded in the said prior art, which thereby leaves a chance of dismantling of the cap from the level indicating housing.
Hence, in light of the cited prior art and their limitations there is a requirement of a threaded cap structure with level indicating assembly and also a kind of structure so as to prevent water entry in the system.
Thus the first objective of the present invention is to provide a brake fluid level indicator which has a threaded cap structure so as to prevent the dismantling of the cap from the brake fluid reservoir assembly.
Second objective of the present invention is to provide a press fit arrangement between cap and level indicating housing assembly.
The third objective of the present invention is to provide components which will act as oil seal structure by providing a press fit arrangement between the level indicating assembly and the cap for the fluid level indicator.
The fourth objective of the present invention is to prevent water entry to the indicator.
The fifth objective of the invention is to preventing the structure form providing incorrect indication by glow of light at maximum fluid filled condition.
The sixth objective of the invention is to have a three piece structure for the brake fluid reservoir assembly.
The seventh objective of the present invention is to develop a fluid level indication assembly without changing the arrangement of the brake fluid reservoir assembly.
The final objective of the invention is to develop a level indicating structure for brake fluid reservoir which is easy to manufacture and durable at the same time.
BRIEF DESCRIPTION OF THE INVENTION
In order to achieve the above objects, the present invention provides a level indicating assembly for a brake fluid reservoir which is integrated with said brake fluid reservoir itself. Fluid level indicators are provided to indicate the level of fluid in the brake fluid reservoir. In the present invention the level indicating housing is provided with a threaded cap structure with upper and lower body structure of the same. The upper cap body is fitted into the level indicating housing with the help of press fit structure. The threaded cap structure prevents removal of the cap from the fluid level indicator assembly. Over and above, there is no relative movement between the cap lower body and cap upper body, whereas there is a relative movement between the cap upper body and the level indicating housing. This is facilitated by the locking structure so provided in the form of slot on the cap upper body and the projection on the level indicating housing. Thus the rotation of the cap lower body does not lead to the rotation of the cap upper body or the level indicating assembly and thus wire entanglement is prevented. The structure is also such that water entry is prevented in the housing.
The floater arrangement with floater cap is placed in the fluid level indicating housing which has a washer fitted on its top end. Once the brake fluid goes beyond the minimum level, the washer comes in contact with the terminals which are integrally placed in the cap structure above the level indicating assembly. This completes the electric circuit and results in signalling to the driver of the vehicle, in form of light glow, of the reduced level of said brake fluid.
Moreover to prevent fault signalling when fluid level is at maximum, an extension is provided on the cap upper body which prevents the washer to come in contact with the terminals at such condition.
Although the subject matter has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. As such, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiment contained therein.

BRIEF DESCRIPTION OF THE DRAWINGS
Other aspects of the invention will become apparent by consideration of the accompanying drawings and their description stated below, which are merely illustrative of a preferred embodiment of the invention and do not limit in any way the nature and scope of the invention.
Figure 1 illustrates the schematic diagram of the three wheeler vehicle with the hydraulic connections assembly in accordance with the present invention.
Figure 2 illustrates the cross sectional view of the brake fluid reservoir assembly in accordance with the present invention.
Figure 3 illustrates the perspective view of the fluid level indicator assembly and all the components of the same according to the present invention.
Figure 4A illustrates the perspective view of the fluid level indicator assembly according to the present invention.
Figure 4B illustrates the perspective view of the fluid level indicator assembly with the cap upper body open according to the present invention.

DETAILED DESCRIPTION OF THE DRAWINGS
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.
The Figure 1 illustrates the schematic diagram of the three wheeler vehicle with two rear wheels (10) and a front wheel (20). The brake fluid reservoir assembly (1000) is placed in the front side of the vehicle, adjacent to the brake pedal (30). The hydraulic lines (40, 50 and 70) goes respectively to the rear wheels (10), light indicator (60) and the rear wheel (20).
The Figure 2 shows the cross sectional view of the brake fluid reservoir assembly (1000) along with the integrated fluid level indicator assembly (2000 as shown in Figure 3). The fluid level indicator assembly (2000 as shown in Figure 3) is integrally placed over the brake fluid reservoir assembly (1000). The fluid level indicator assembly (2000 as shown in Figure 3) is threaded with the brake fluid reservoir assembly (1000) and the groove for press fit (138) helps in press fitting of the cap upper body (100 as shown in Figure 3) and the fluid level indicating housing (106). Said fluid level indicator assembly (2000 as shown in Figure 3) is placed in a way such that the floater holder (110) with the floater cap (112) inside the floater cover (114) floats on the top of the brake fluid (128) which is placed in the brake fluid reservoir (118). The inlet for brake fluid (130) allows the brake fluid (128) to enter the floater cover (114) and the floater (112) movement in linear direction happens accordingly with the amount of brake fluid (128) available in the brake fluid reservoir (118). A washer (104 as shown in Figure 3) is placed on the floater holder (110) which serves to connect or disconnect the terminals (120 shown in Figure 3) based upon the amount of brake fluid (128) level. When the washer (104 as shown in Figure 3) along with the terminals (120 as shown in Figure 3) completes the electric circuit, at the low brake fluid (128) level condition, a warning indication is being sent to the driver of the motor vehicle in form of glowing light in the light indicator (60 as shown in Figure 1). The extension (132) on the cap upper body (100 as shown in Figure 3) helps prevent the washer (104 as shown in Figure 3) to come in contact with the terminals (120 as shown in Figure 3) when the brake fluid (128) level is maximum and thereby prevent faulty signals.
The Figure 3 illustrates the perspective view of the fluid level indicator assembly (2000) which comprises of a cap structure (126), a washer (104), a fluid level indicating housing (106), a rubber seal (108) and a floater holder (110) with floater (112) and a floater cap (114) arranged sequentially with each other. The said cap structure (126) of the fluid level indicator assembly (2000) comprises of cap upper body (100) and cap lower body (102) which functions as a closing structure for the level indicating housing (106). The wire harness with terminal assembly (116) is placed in a way such that the terminals (120) are placed inside the level indicating housing (106) till the cap lower body (102). The level indicating housing (106) is integrally placed inside the cap structure (126). The floater (112) along with the floater holder (110) has washer (104) fitted at one end of the floater holder (110). When the fluid (128 as shown in Figure 2) is at optimum level in the brake fluid reservoir (118 as shown in Figure 2), the floater holder (110) along with the floater (112) moves up and thus the washer (104) is not in contact with the terminals (120). Thereby no indication is being transferred to driver. As and when the fluid (128 as shown in Figure 2) in the brake fluid reservoir (118 as shown in Figure 2) comes below a minimum level, the floater holder (110) along with the floater (112) moves down. In such condition the washer (104) comes in contact with the terminals (120) which thereby completes the circuit and results in indication in the form of light glow in the light indicator (60) to the driver of the motor vehicle.
The Figure 4A and 4B gives the close-up view of the fluid level indicator assembly (2000 as shown in Figure 3) and one without the cap upper body (100) of the fluid level indicator assembly (2000 as shown in Figure 3) respectively. The Figure 4B shows the internal arrangement of the terminals (120) inside the fluid level indicating housing (106 as shown in Figure 3). The cap upper body (100) has slot (134) which functions as lock arrangement for with the projection (122) in the level indicating housing (106). Such arrangement prevents the relative movement between the cap upper body (100) and cap lower body (102) and thereby the wire is prevented from entanglement. Another slot (136) is placed perpendicularly to the wire exit (124) for the wire of the wire harness with terminal assembly (116) so that the wire is bent from the wire exit (124) and taken out through the slot (136). This arrangement helps prevent water entry into the fluid level indicating housing (106) and thus protects from damage.
The technical advancements offered by the present disclosure include:
• The present invention results in elimination of the chances of reservoir cap damage or breakage due to foot movement of the driver inside the cabin of the motor vehicle by the means of its improved threaded arrangement.
• The level indicating housing arrangement with the upper and lower cap body is done such that there is no relative movement between the said parts, but movement is there between the cap upper body have the level indicating housing. Also the wire of wire harness with terminal is prevented from entanglement.
• Wire exit and slot in upper cap body through which wire is taken out are perpendicularly situated to each other which helps prevent water entry in the said level indicating housing.
• The contact break type sensor used in the present invention helps provide indication to the driver with regard to fluid level.
• The extension provided in the cap upper body helps prevent the fault signalling when fluid level is at maximum by preventing the washer to come in contact with the terminals at such condition.
While considerable emphasis has been placed herein on the specific features of the preferred embodiment, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiment without departing from the principles of the disclosure. These and other changes in the preferred embodiment of the disclosure 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 disclosure and not as a limitation.

LIST OF REFERENCE NUMERAL

10-Rear Wheels
20-Front Wheel
30-Brake Pedal
40, 50, 70-Hydraulic Lines
60-Light Indicator
100-Cap Upper Body
102-Cap Lower Body
104-Washer
106-Fluid Level Indicating Housing
108-Rubber Seal
110-Floater Holder
112-Floater
114-Floater cover
116-Wire Harness with Terminal assembly
118-Brake Fluid Reservoir
120-Terminals
122-Projection
124-Wire exit
126-Two piece Cap Structure
128-Brake Fluid
130-Inlet for Brake fluid
132-Extension
134, 136-Slot
138-Groove for press fit
1000-Brake Fluid Reservoir Assembly
2000-Fluid Level Indicator Assembly