Brakes – Elements – Cooling and lubricating
Reexamination Certificate
2001-07-13
2004-03-09
Butler, Douglas C. (Department: 3683)
Brakes
Elements
Cooling and lubricating
C303S002000, C303S024100, C303S061000, C188S18100R
Reexamination Certificate
active
06702074
ABSTRACT:
FIELD OF INVENTION
The present invention relates generally to the field of brake assemblies, and more particularly but not by way of limitation, to heat dissipating braking systems.
BACKGROUND OF INVENTION
Brake components on vehicles that make frequent stops, such as intercity buses, often suffer overheating and excessive wear. The constant use of the brakes during frequent stops does not allow the rotor or drum to dissipate the heat since the brake force is reapplied before the rotor or drum can cool down. This excessive heat, which is not absorbed effectively so as to be dissipated by the rotors or drums, can retemper the drums or rotors and cause reduced braking efficiency and premature brake wear.
Prior art devices have addressed the problem of brake heat by use of air blowers directing air onto brake drums. Air can also be advantageously circulated by the use of fins attached to the wheels to direct air to the rotors or drums. These prior art devices are not widely used for a variety of reasons, but mostly because such prior art devices have not been cost effective.
There is a need for an effective and cost efficient system that will protect brake assemblies from thermal degradation due to overheat conditions.
SUMMARY OF THE INVENTION
The present invention provides a brake heat reducing system for reducing the temperature of brake components in vehicles, the brake heat reducing system cooperating with the braking system of the vehicle and having a control device that is energized in response to a braking event of the vehicle. A modulating device is activated by the control device in response to vehicular braking for modulating braking pressure during application of the vehicular braking.
The control device has a timer relay and an accelerometer, the accelerometer being responsively inclined by the braking force exerted to the vehicle, thereby activating the control device which modulates fluid pressure to the vehicle brakes, thereby allowing thermal energy to be conducted to the metal rotors or drums where the heat is dissipated more efficiently. Thus, the brake heat reducing system effects a reduction of the overall temperature of the brakes, improving the efficiency and lifetime of automotive equipment and reducing brake noise and dust.
The advantages and features of the present invention will be clear from the following detailed description and drawings when read in conjunction with the appended claims.
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Butler Douglas C.
Fellers , Snider, et al.
McCarthy Bill D.
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