This invention relates to a brake fluid reservoir for a motor vehicle.
The known hydraulic brake system for motor vehicles consists of a master cylinder assembly including a first pressure chamber and a second pressure chamber independent of each other. Also provided are a pair of front wheel brake assemblies, each including two front wheel brake cylinders, a pair of rear brake wheel assemblies, each including rear wheel brake cylinders, one of said front wheel brake cylinders in each front wheel brake assembly having two pistons slidably mounted therein, normally contacting each other, and having different effective diameters. These pistons provide first and second wheel brake chambers independent of each other, the other of said front wheel brake cylinders in each front wheel brake assembly being provided with a third wheel brake chamber therein, said first wheel brake chamber being connected for fluid communication with the first pressure chamber of the master cylinder assembly and with the third wheel brake chamber. The second wheel brake chamber is connected for fluid communication with second pressure chamber of the master cylinder assembly and with rear wheel brake cylinder.
This invention relates to hydraulic brake systems, and more particularly to improved dual brake systems for use on vehicles in which when one of the hydraulic brake circuits fails or is damaged the remaining brake circuit is utilized to actuate the brakes.
To assure effective operation of the dual brake systems it is essential that the front and rear wheel brake circuits be completely independent during brake application. It is also essential that the brake capacity of the front wheel brake assemblies of the vehicle be greater than that of the rear wheel brake assemblies, for instance 66 percent of the total brake forces are supplied to the front wheel brake assemblies while 34 percent thereof are supplied to the rear wheel brake assemblies, since the vehicle load applied onto the front wheels is greater than that applied onto the rear wheels due to transference of the vehicle
loads during brake application. Thus, in the event of failure of the front wheel brake circuit the total brake capacity of conventional systems will be only 34 percent. This is highly undesirable because of insufficient brake capacity.
In order to avoid this drawback, there have been proposed several hydraulic dual brake systems in which each wheel brake assembly is supplied with two independent hydraulic circuits. However, such brake systems require the complicated structures for each wheel brake cylinder and hydraulic brake circuits which result in great cost in manufacture.
The novel features of this invention are:
Integral one-piece molded brake fluid reservoir More number of chambers with single mould No separator required for different chambers Ease of mounting with master cylinder High strength
No special welding to join primary and secondary chambers required since it is single moulded
This invention will now be described with reference to the accompanying drawings which illustrate by way of example, and not by way of limitation, one of possible embodiments.
Fig 1 shows the reservoir integral master cylinder, which has single mould reservoir with cap. Reservoir has two chambers, primary and secondary chambers connected to master cylinder primary and secondary chambers by means of fasteners. Reservoir has threaded type cap with fluid level indicator. Reservoir Integrated Master Cylinder is assembled to the chassis in a vehicle with master cylinder mountings. Pivot brake pedal mounted with brake pedal as shown in fig 2
The embodiment illustrates an integral one-piece molded brake fluid reservoir that has enhanced structural strength. The brake fluid reservoir has a body and a fluid level detecting device. The body is hollow and integrally one-piece molded and has a top, a bottom, two sides, and two chambers, a fluid inlet and two fluid outlets. The chambers are defined in the body and have an inner surface which is connected to two different outlets. The fluid inlet is defined in the top and communicates with the chamber. The fluid outlets are defined in the bottom respectively near the two sides of the body and communicate with common chamber. The fluid level detecting device is mounted in the cap.

We Claim:
1. A brake fluid reservoir for a motor vehicle constituted by an integral one- piece molded body with cap and a fluid level detecting device, said body having primary and secondary chambers connected to master cylinder primary and secondary chambers by means of fasteners, a fluid inlet and two fluid outlets, the fluid inlet located at the top and communicating with the common chamber, and the fluid outlets located at the bottom respectively near the two sides of the body and communicating with primary and secondary chamber, the fluid level detecting device being mounted in the cap.
2. A brake fluid reservoir for a motor vehicle substantially as herein described and illustrated with reference to the accompanying drawings.