Brake lever assembly for engaging two brake cables

Machine element or mechanism – Control lever and linkage systems – Hand operated

Reexamination Certificate

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Details

C074S501600

Reexamination Certificate

active

06324937

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a brake lever assembly used in stunt bicycle and the brake lever assembly engages with two brake cables.
BACKGROUND OF THE INVENTION
A stunt bicycle generally includes a handlebar assembly that is allowed to be freely rotated relative to the head tube so that the rider can fix the front wheel and rotates the bicycle frame to perform a special stunt. In order to prevent the brake cables from tangling the handlebar or the head tube when rotating the handlebar, a rotatable device is connected to the head tube and two brake cables are respectively connected to the rotatable device. The rotatable device includes two independent parts and the brake cables are connected to the top part so that when rotating the handlebar, the lower part remained still and the two brake cables are co-rotated with the top part. This feature can be achieved by combining the two brake cables into one braid which is then connected to the brake lever so that when pulling the brake lever, the braid is pulled and the two brake cables are actuated. However, to combine the two brake cables is difficult for the riders and the two brake cables will apply different forces to the respective brake caliper because the way that winds the two brake cables affects the transportation of the brake force. The winding portion of the brake cables tends to be broken because the stress concentration.
The present invention intends to provide a brake lever assembly which has two engaging slots so as to respectively engage two brake cables individually.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a brake lever assembly and comprising a frame with a lever pivotably connected to a first end of the frame and a fastening means connected to a bottom of the frame. Two engaging slots are defined in a first end of the brake lever so as to engage two brake cables. A bolt member has a head and a threaded shank extending from the head. The threaded shank is longitudinally and threadedly connected to a second end of the frame and two grooves are defined longitudinally in an outside of the threaded shank. The head has two passages defined therethrough and the two passages communicate with the two grooves which communicate with the two slots in the frame. The two brake cables extend from the lever and are engaged with the grooves and extend from the passages of the bolt member.
The object of the present invention is to provide a brake lever assembly for a stunt bicycle wherein two individual brake cables are connected to the brake lever assembly.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.


REFERENCES:
patent: 4644816 (1987-02-01), Cockburn
patent: 4850241 (1989-07-01), Buckley et al.
patent: 5778729 (1998-07-01), Tsai
patent: 5906140 (1999-05-01), Smith
patent: 5946978 (1999-09-01), Yamashita
patent: 5966993 (1999-10-01), Ekins
patent: 6085611 (2000-07-01), Valdez
patent: 6257087 (2001-07-01), Lee
patent: 1053160 (1954-02-01), None
patent: 1326831 (1963-04-01), None
patent: 8668 (1915-01-01), None

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