Brakes – Vehicle – Velocipede
Patent
1994-08-08
1997-06-03
Oberleitner, Robert J.
Brakes
Vehicle
Velocipede
188 85, B62C 100
Patent
active
056345330
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a braking device for bicycles and motorcycles, whose principal function is to prevent the front or rear wheel from locking up when the rider actuates the brake lever.
It is known that in emergency circumstances resulting from a road surface that has been made slippery by rain or mud, or in emergency circumstances due to the unpredictable nature of traffic situations, the rider of a bicycle or motorcycle is often called upon to act extremely quickly to stop his vehicle in as small a space as possible and without losing control.
However, it is also known that the delicate equilibrium of two-wheeled vehicles does not always allow this goal to be reached. Instead, it frequently occurs that the rider loses control of his vehicle even though he has rapidly taken the proper steps to actuate the braking systems at his disposal; such failure to maintain control usually occurs when one of the wheels, most often, the front wheel, locks up.
To prevent this from occurring and to prevent the resulting physical harm that may occur to the passive victim of such an event (i.e. the rider), there is one way to solve the problem: modifying the braking system of the vehicle so that neither one of the wheels is allowed to lock up.
An improved braking device for bicycles is disclosed in EP-A-269547. According to this prior art the effectiveness of a brake is improved by actuating the same hydraulically. Pressurised oil is fed by a pump which is driven by a bicycle wheel. However this document does not provide any suggestion on how to prevent the braked wheel to lock up.
DISCLOSURE OF INVENTION
This result can be obtained by actuating a device which draws off a portion of wheel movement and transmits such movement through a transmission shaft to an eccentric element or cam which is connected to a small piston. This piston is in turn directly connected to a brake pad whose action has been made more efficient by the shape of the pad itself (hollow in the inside). In this way the braking action is not continuous as in the braking systems currently on the market, but instead is intermittent as a result of the intermittent action exerted by the piston on the brake pad. The basic feature of this discovery is that the wheel of the vehicle is the source of the braking force.
As will be illustrated later on, the motion that powers the system is mechanically drawn from the rotating tire; however, it must be emphasized that any and all cases in which motion is drawn from any bicycle or motorcycle wheel component, such as tires, rims, disc-brakes, hubs, accessories and other systems, even those that have been added for this specific purpose at any point on the wheel, herein defined as a rotating system, are to be considered as analogous and equivalent systems which are covered by this patent. Likewise, this discovery also covers transmissions systems, such as belts, shafts, flexible elements etc., that are different from the system illustrated herein, as well as any power take off methods, such as co-axial take-off, tangential, take-off etc., that are different from the method illustrated herein.
The effectiveness of the system described herein is enhanced by two important secondary factors: the force with which the rider pushes a knurled wheel against the tire when he actuates the brake lever, as well as the inertia with which the eccentric-piston assembly opposes the rotational movement of the wheel.
The primary purpose of the discovery described herein is to perfect a device that uses a wheel to draw motion from the wheel of the vehicle considered, bicycle or motorcycle, and that subsequently transmits such motion to a system, i.e. a shaft or a lever, including an eccentric, all this representing a mechanism which imparts an intermittent impulse to a brake pad.
Another purpose of this discovery is to perfect a device, according to the device described in the preceding paragraph, in which the wheel of the device draws motion from the rim or from the sidewall of the tire and the brake pad exerts
REFERENCES:
patent: 486464 (1892-11-01), Haag
patent: 2270586 (1942-01-01), Jahant
patent: 2660266 (1953-11-01), Maloney
Bartz C. T.
Oberleitner Robert J.
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