Brakes – Elements – Cooling and lubricating
Reexamination Certificate
2000-04-26
2001-08-14
Schwartz, Christopher P. (Department: 3613)
Brakes
Elements
Cooling and lubricating
C188S024110, C188S071600
Reexamination Certificate
active
06273223
ABSTRACT:
DESCRIPTION
Object of the Invention
The present Utility Model application has as an object the registration of an improved disc brake incorporating remarkably innovations and advantages in front of the present disc brakes used in automotion or for similar purposes.
More particularly the invention has devised a disc brake made up with a disc and some brake pads having suitable entrants and hollows for causing an air stream through said disc and pads when in operation, all that turning up a better performance throughout.
BACKGROUND OF THE INVENTION
Presently several brakes used in cars, trucks and motorcycles are available in the market. One of the mostly used is the disc brake, because of its high performance and easy manufacturing.
Said brake is made up with a disc or a flattened circular crown integral with the wheel and some nippers located on said disc, the nippers being fitted for pressing the pads on the disc flat surface. Friction between a moving disc and the pads converts the disc kinematic energy into heat and the desired braking effect is thus achieved.
Said heat shall be released from the disc since otherwise it will be heated to a temperature causing serious problems. Problems like the loss of material hardness, large strains, brake life-shrinking and brake fluid steaming and others too are caused by an excessively heated disc brake.
Heretofore all these problems are only overcome by sizing correctly said discs, chastising weight factor, a very significant factor in the racing field. It can also be reduced by opening windows in the disc, although the disc thickness itself laying out obvious limitations.
The so-called self-ventilated discs are also available, said discs having inside between both side faces a turbine-shaped cavity, however its weight and cost often is highly enough.
DISCLOSURE OF THE INVENTION
The improved disc brake object of the present registration, is characterized in that it comprises a disc and two recessed brake pads such that a cavity is formed between both when braking and this cavity is pushing on an air stream like the one set up at the blades of a centrifugal turbine. When the disc is rotating, said air stream springs up from the disc inside perimeter and flows down through the entrant and is exhausted by the recess when said entrant flows between the brake pads. In this way the brake disc and pads are cooled by the forced air stream preventing in turn the pernicious effects of a disc to bear under a high temperature and further a remarkable size and weight waning is thus achieved.
Consequently the disc set up by a flat circular crown has a plurality of entrants at the inside. Said entrants can be radially-arranged, rearwardly or forwardly curved.
In turn each of the pads has a wide recess and an associated arrangement with the disc entrants. Just that the bottom of the entrants and the recess present in each pad, when matching at a mutual interference area, and the disc is rotating are both forming an air ducting.
Each of the multiple entrants present in the disc is really performing like the blade of a turbine by pushing on the air longwise and outwardly. When the air reaches the entrant bottom is deviated and flown down into the two recesses present at each brake pad, the air is exhausted down the rear portion of both pads. Cooling of the disc and pads unit during the air flowing is thus achieved.
To complete this description which will be further set out hereinafter and just to help to a better understanding of its characteristics, a set of drawings which figures illustratively and non-exhaustively show the most relevant details of the invention is attached to the present description.
REFERENCES:
patent: 2849092 (1958-08-01), Foster
patent: 4286694 (1981-09-01), Wiseman, Jr. et al.
patent: 4485898 (1984-12-01), Bracken et al.
patent: 5544726 (1996-08-01), Topouzian et al.
patent: 5564533 (1996-10-01), Parsons
patent: 6109399 (2000-08-01), Crawford et al.
patent: 6139413 (2000-10-01), Sirany
patent: 6145636 (2000-11-01), Ikari et al.
patent: 6186293 (2001-02-01), Beer et al.
Jones Day Reavis & Pogue
Pezzlo Benjamin A.
Schwartz Christopher P.
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