Brake system

Details Brake system Brake system

2000-12-14

2003-02-18

Lavinder, Jack (Department: 3613)

Brakes

Internal-resistance motion retarder

Using yieldable or fluent solid or semisolid

Reexamination Certificate

active

06520302

ABSTRACT:

BACKGROUND OF THE INVENTION
Various forms of brakes and brake systems are well known and have been used for years. For example, brakes have been used on automobiles from the beginning. In the early days of wheeled devices, the first brakes are believed to have been some sort of chock or anchor. In the early days of the bicycle a “spoon” brake involved a lever that pressed a block of wood against the wheel. In the early 1900's, the internal expanding drum brake was developed. Since then, numerous forms of brakes for automobiles and other devices have been developed.
Today, the typical brakes on automobiles are disc brakes, although drum brakes are still used. Disc brakes use a clamping action to produce friction between a rotor and pads mounted in a caliper attached to a suspension and actuation system. Inside the calipers, are pistons which press against the pads as a result of pressure generated in a master cylinder. The pads then rub against the rotor, thereby slowing the vehicle. Drum brakes usually use two semi-circular shoes to press outward against the inner surfaces of a steel drum. Older cars often had drum brakes on two or four wheels, and many new cars now have four wheeled disc brakes.
Other forms of brakes have been developed and used in various forms of equipment. Examples are electromagnetic brakes and clutches which usually include two rotors with magnetic particles disbursed in the air gap between both rotors, and an electric current passing through an associate coil creates a magnetic field which aligns the magnetic power into the gap. The higher the current, the more rigid the connection between the two rotors becomes.
As is known, the various forms of drum and disc brakes involve a number of moving parts and components. The electromagnetic particle brakes also suffer from several disadvantages, including a number of components, but also they may not be sufficiently effective at low RPM, and there can be problems in keeping the powder homogeneously between the gap between the rotors, and heat dissipation can be a problem.
SUMMARY OF THE INVENTION
The present invention is characterized by relative simplicity compared to prior brakes and brake systems. In its simplest form, it comprises a stationery housing containing a rotating disk therein with a shaft affixed to the disk and extending from the housing. The disk has a plurality of holes therethrough. Suitable bearings and seals are provided between the housing and disk, and the braking action is provided as a result of applying a pressurized fluid through a fluid port in the housing and into the cavity therein around and through the holes in the rotating disk. The fluid preferably is a polybutene grease which becomes solid through the application of pressure, but which is suitably liquid when the pressure is released. The device can be used either as a brake or a clutch, has no replicable parts, and no required maintenance.
Accordingly, it is the principal feature of the present invention to provide a new form of brake or clutch.
Another feature of the resent invention is to provide a new form of brake or clutch relying on a pressurizable fluid applied within a housing to controllably restrict the rotation of a rotating disc within the stationery housing.


REFERENCES:
patent: 4610341 (1986-09-01), Hauser et al.
patent: 5201392 (1993-04-01), Kramer

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