Patent Application
20110162929
1. Field of the Invention
The present invention relates to a brake system, and more particularly to a holder for a hydraulic brake system used for reducing volume and weight.
2. Description of Related Art
A conventional brake system has a mechanical structure and is relied on leverage to pull a cable. However, the conventional mechanical system requires a lot of element such that it is inconvenient to assemble the conventional mechanical system. The various elements also cause the conventional mechanical system to be unstable. Furthermore, the conventional mechanical system is simultaneously operated. All elements are operated together such that it takes strenuous strength for a user. Each element is related to other elements such the tolerance and gaps between the elements will consume the braking effect.
A conventional hydraulic brake system includes two brake devices respectively mounted on two handlebars of a bike and two hydraulic devices respectively mounted on the two brake devices. The two brake devices positioned on two handlebars are dominated with a front brake assembly and a rear brake assembly. However, each hydraulic device has hydraulic fluid filling therein such that the two hydraulic devices are heavy. The two hydraulic device are also increased the size of the handlebars. Those are not suitable for the requirement of the light weight bike. Furthermore, the form of the handlebar is adjusted due to the hydraulic device mounted on the handlebar. This costs a lot to re-thread the handlebar and increases a manufacturing fee of each bike. The stability of the structure of the conventional hydraulic brake system is decreased. Besides, the conventional hydraulic brake system is not able to mount on a mountain bike. The mountain bike has a derailleur mechanism mounted on the handlebar. The derailleur mechanism includes a transmission lever and a transmission cable. Therefore, a receiving space of the handlebar is more decreased and is not able to assemble with the conventional hydraulic brake system.
The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional brake system.
The main objective of the present invention is to provide an improved hydraulic brake system which is extensive utilized in all kinds of bike.
To achieve the objective, the hydraulic brake system comprises a bicycle steering assembly. The bicycle steering assembly includes a head tube, a connecting member connected with the head tube and a handlebar mounted on the connecting member. The connecting member has a receiving portion disposed therein. A hydraulic device is mounted in the receiving portion. The hydraulic device includes a hydraulic braking mechanism and at least one connecting tube connected with the hydraulic braking mechanism. The hydraulic braking mechanism has a hydraulic container mounted in the connecting member. The hydraulic container has two hydraulic tanks disposed therein for receiving fluid. The hydraulic container has two first connecting holes defined in a bottom thereof for respectively communicating with the two hydraulic tanks. Two connectors pass through the connecting member and are respectively connected with the two first connecting holes. Each connector has one end connected with a corresponding first connecting hole and the other end connected with the connecting tube. Two pistons are respectively received in the two hydraulic tanks. Two elastomers are respectively mounted on the two pistons. The hydraulic container has a second connecting hole defined in a top thereof A fluid tank is mounted on the hydraulic container and communicated with the second connecting hole for storing fluid and replenishing the fluid in the hydraulic tank. A braking device is adapted to mount on a wheel of the bicycle. The at least one connecting tube is connected with the braking device for hydraulically driving the braking device to provide a braking effort. Two brake levers are respectively mounted on two ends of the handlebar. Each brake lever has a brake cable connected therewith. Each brake cable has one end connected to a corresponding brake lever and the other end connected to a corresponding piston in the hydraulic brake mechanism for relatively driving the brake device.
In accordance with another aspect of the present invention, the hydraulic brake system in accordance with the present invention is mounted on the head tube.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
Referring to the drawings and initially to
When a user presses the brake lever 30 to pull the brake cable 31, the brake cable 31 pulls the piston 45 to press the fluid in the hydraulic tank 44 such that the fluid is flowed into the connector 47 via the first connecting hole 441 and guided into the connecting tube 41 for actuating the braking device 42.
Referring to
With reference to
The hydraulic brake system in accordance with the present invention provides the following advantages:
1. The hydraulic brake system in accordance with the present invention can be utilized on any kind of element of the bicycle steering assembly 10, such as stem or head tube 13. The hydraulic brake system is not necessary to assemble with the handlebar 12. The weight and size of the bike can be reduced.
2. The hydraulic brake system in accordance with the present invention can be utilized on any kind of bike handlebar 12. The handlebar 12 of the bike doesn't need to be modified or changed. A diameter of the handlebar 12 does not need to be adjusted. Therefore, the structural strength and the stability of the bike are enhanced.
3. When a racing bike or a mountain bike utilizes the hydraulic brake system in accordance with the present invention, the braking device 42 and the derailleur of the bike are not necessary to be changed. Therefore, the hydraulic brake system in accordance with the present invention is widely extensive utilized.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 099100159 | Jan 2010 | TW | national |
