FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION
"HYDRAULIC BRAKE"
2. APPLICANT
VALERA, RUSHIT JAYSUKH; an Indian National Having address at 6, patel colony,Near Radha-krishna
Temple, Jamnagar-361008, Gujarat.
3. PREAMBLE OF THE DESCRIPTION
The following specification describes the invention.

TECHNICAL FIELD
[001] The present subject matter generally relates to hydraulic braking system. Preferably it relates to hydraulic braking system used to operate and control the movement of rotating device. More particularly it is useful in the automobiles.
BACKGROUND
[002] Braking system is an essential component of a moving object. Normally braking system is used to operate and control the movement of the moving object. It is mainly used to stop the movement of the moving object such as four wheeled and two wheeled vehicle. Hence prevent from severe accidents.
[003] Now the available braking systems are mechanical and/or hydraulic in nature with certain limitations. The mechanical braking system used cam and linkages to operate the braking system; where limited amount of force could be transferred to brake shoe, therefore it is not safe and user friendly for moving object such as automobile. The problem of mechanical braking system may be of getting stuck due to high friction between the worn-out surfaces of cam and shoe. Also the force exerted is limited which may not be sufficient to stop a vehicle at high speed or sometimes when the load is more and momentum is high.
— [004] To overcome above problems, many inventors attempted and came up with hydraulic brake system. The hydraulic brake system replaced the cam with the expander unit . to apply force on the shoes to apply braking force. Thus the introduction of hydraulics in applying brakes significantly improved the efficiency of the mechanical brakes with ensuring smooth operation. But the problem of equal distribution of force is still lacking in the hydraulic brake system. And because of that non-uniform force over whole shoe resulted in non-uniform wear of brake linings and ultimately wastage of brake pads during its replacement, as some part has been used completely and remaining is left unused. And still the required amount of force needed to apply the brakes instantly was not generated significantly.

[005] Further to overcome the problems of hydraulic brake. Several inventors invented "disc brake" technology. In this technology, the axial brake is operated by hydraulic force. Thereby it is user friendly as compared to mechanical & hydraulic brake system.
[006] But the disc brake technology has certain limitations such as more wear of pads compared to radial internal expanding shoe brakes, complicated design for smooth application of brakes, poor parking brake performance, costly, etc. Also as the frictional area of pads is very less compared to the drum brake, the pressure intensity required is considerably higher.
[007] Hence there is an unmet need of brake system which is cost effective, user friendly, easy to operate.
Object of the invention
[008] The primary object of the present invention is to provide braking system having equal uniformly distributed fluid force system.
[009] Another object is to control the wastage of the shoe linings as the wear of each one is uniform and all would be replaced after same time interval.
[0010] Yet anotherobjectjstoprovidebetterefficiehcy system.
[0011] The present invention also can be installed in the existing vehicles with little modification. Thus the existing ones can be replaced easily.
Summary of the invention
[0012] To overcome the abovementioned problems, the present subject matter describes a hydraulic brake system, wherein force is uniformly & equally distributed on all the brake shoes. The system has fluid (oil) inside the casing and creating the arrangement of the master cylinder having the fluid and the casing of the brakes having shoes such that the pressure of the fluid is distributed uniformly on all the shoes with the application of force in the master cylinder. Thus highly efficient and uniform braking force is developed which ultimately

helps in applying smooth brakes Also the wastage of the brake pads or brake linings can be avoided as all pads wear uniformly and have same life.
[0013] In another embodiment, the present subject matter also describes the process to operate the system of the present subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 describes the hydraulic brake system of present subject matter.
1- Casing: This is the main part of the brake which encloses and holds other moving parts inside it. It not only holds other parts but also protects them from direct external damage and also environmental effects on them. It comprises of two disks and four shoe guides arranged between two disks as shown in fig.2.
2- Brake shoe: This.is the member of the assembly on which the actual pressure force generated by the fluid is applied. Due to this it slides out from the casing and applies the braking force on the external rotating drum just outside the casing and thus retards or stops the motion of the vehicle. The return mechanism of the shoes is due to the suction force created when the shoe paddle is released. Shoes can also be provided with the rings or some liner on its surface to prevent the leakage of oil.
3- Shoe pad: This acts as an interface between the shoe and the rotating drum outside, to get required co-efficient of friction and also to prevent the wear of the drum. For that the material used for it is not harder than the drum material but little softer. This ensures that only the pad gets worn out due to the friction between them and not the drum.
4- Fluid inlet: It is the entry hole through which the fluid will enter inside the casing.
5- Fluid: It is the working medium for the transfer of force from the brake pedal to the brake shoes. Generally the fluid used is oil i.e. brake oil.
. 6- Pressure force distribution inside the casing on the shoes
7-Solid disks: It acts as the housing or the support structure for all the shoe guides and brake shoes.

8- Shoe guides: They are mainly used to give specific path to the brake shoes and
confine their motion. They also form a part of the casing and make a part of the brake
structure.
FIG. 2 shows the 3D diagram of the invention. Here the shoes are in expanded position
when the brakes are applied.
FIG. 3 shows the solid disks which may form the casing of the invention.
FIG. 4 shows the guides for the shoes which would channel the shoes in particular
direction i.e. radially outwards.
FIG. 5 shows the shoes of the brakes which would slide out when the force of fluid(oil)
acts on it and it comes back to its original position due to suction when the brake is
released.
DETAILED DESCRIPTION OF THE SUBJECT MATTER
[0014] Before the present subject matter is described in further detail, it is to be understood that the subject matter is not limited to the particular embodiments described, as such may, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting, since the scope of the present invention will be limited only by the appended claims. It must be noted that as used herein and in the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise.
[0015] The hydraulic brake system of present subject matter comprises casing(i), brake shoe(2), shoe pad(3),shoe guide(8), fluid(5) and brake drum which is rotating outside the brake along with the wheel of an automobile vehicle . The casing(1) is an assembly of the solid disks(7) and brake shoe guides(8). It acts as the guide way for brake shoes(2) and holds them at their place. The brake shoes(2) slides in and out as per the force acting on them due to the fluid(5) i.e. the brake shoes(2) slides out when the brakes are applied or when the brake paddle is pressed, and the brake shoes(2) comes back to their original place when the brake paddle is released. There is shoe pad(3) on the brake shoe(2). The brake shoe{2) transmits the radial force of the fluid to the brake drum and stops its rotating motion and hence the vehicle. The

shoe pad(3) acts as an interface between the surfaces of brake shoe(2) and brake drum providing required co-efficient of friction and also preventing the wear of the brake drum by the brake shoe(2) as the hardness of its material is less than that of the brake drum. Fluid(5) present inside the casing transmits the force to the brake shoes(2) which in turn acts on the rotating drum and stops it.
[0016] The present system operate on the principle of Pascal's law or the principle of transmission of fluid-pressure which states that pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure ratio (initial difference) remains the same.
[0017] In this system the fluid comes through the fluid inlet(4) at the center and gets distributed in whole of the casing(i) exerting uniform force on all the brake shoesU). Thus the brake shoes(2) slide outside, applying braking force on the rotating drum and smooth brakes are applied.
[0018] Now here as the force is directly transmitted through the fluid and as there are no mechanical linkages, the force is transmitted more efficiently and smoothly. Also more amount of force can be transmitted by changing the pressure ratio and thus even heavy and fast moving vehicles can also be stopped easify.
[0019] Here we would get uniform force acting on the brake shoes(2) and thus its wear will also be uniform.
[0020] While the subject matter may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and-have been described herein. Alternate embodiments or modifications may be practiced without departing from the spirit of the present subject matter. The drawings shown are schematic drawings and may not be to the scale. While the drawings show some features of the subject matter, some features may be omitted. Alternatively, in some other cases some features may be emphasized while others are not. Further, the methods disclosed herein may be performed in manner and/or order in which the methods are explained. Alternatively, the

methods may be performed in manner or order different than what is explained without departing from the spirit of the present subject matter. It should be understood that the subject matter is not intended to be limited to the particular forms disclosed. Rather, the subject matter is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the subject matter.
CLAIMS
I claim:
i) A hydraulic brake mechanism comprising multiple shoes and fluid (oil) inside the casing, wherein pressure generated by the master cylinder is transmitted to the brake shoes directly through fluid (oil).
2) A hydraulic brake mechanism as claimed in claim i, wherein all shoes apply force radially.
3) A hydraulic brake mechanism as claimed in claim 1, wherein all the shoes slides in and out equally as they get uniform pressure force.
4) Ahydraulic brake mechanism as claimed in claim 1, wherein there is uniform pressure generated at each points inside the body.
5) A hydraulic brake mechanism as claimed in claim 1, wherein there is uniform wear of the shoe linings.
6) A hydraulic brake mechanism as claimed in claim 1, wherein the force can be varied easily and provides smooth operation.