Metal working – Means to assemble or disassemble – Spreading parts apart or separating them from face to face...
Reexamination Certificate
2001-10-04
2003-06-10
Rachuba, M. (Department: 3723)
Metal working
Means to assemble or disassemble
Spreading parts apart or separating them from face to face...
C029S266000, C029S256000
Reexamination Certificate
active
06574846
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a tool set for replacing brake pads of disc braking systems, particularly to one provided with a screw rod, a sleeve, a first plate body, a second plate body, a guide rod, and at least one connector with various sizes, by which a selective combination of the components described above is capable of providing an automobile with a specialized tool for pressing an initial piston to its initial position for convenient replacing new brake pads when the outward piston is automatically traveled toward old brake pads with a continuous wearing in linings of the old brake pads. Moreover, various selective combinations of the components described above are also capable of providing automobiles employed with different types of disc braking systems with variety of suitable specialized tools fitting functional requirements and being convenient in operation, thereby achieving a high use rate and being convenient for storage.
2. Description of the Prior Art
Generally speaking, a braking mechanism for an automobile, referring to
FIG. 1
, mainly includes a brake disc
10
, a caliper
11
, a pair of brake pads
12
, a cylinder
13
and a piston
14
. The brake disc
10
is rotated with a wheel of an automobile. The caliper
11
correspondingly disposed at one end of the brake disc
10
is combined with the pair of brake pads
12
and has the cylinder
13
disposed at one side. The cylinder
13
is provided with a piston
14
therein. When a driver pressed a brake pedal, brake fluid is forced from a master cylinder into the cylinder
13
to push the piston
14
the brake disc
10
to produce braking action to forcedly stop the rotation of the wheel. When the linings
120
of the brake pads
12
are worn too thin under a certain thickness after a period of use, the brake pads
12
are required to be replaced with new ones to maintain a good braking force for securing safety in driving. However, with a continuous wearing to the linings
120
of the brake pads
12
, the piston
14
is gradually traveled outward into the caliper
11
to make the space of accommodating the brake pads
12
in the caliper
11
become narrower and narrower. Therefore, it is needed to use a specialized tool to press the outward piston
14
to its initial position when replacing new brake pads
12
.
SUMMARY OF THE INVENTION
The main purpose of the invention is to offer a tool set for replacing brake pads of disc braking systems capable of making various selective combinations for automobiles employed with different types of disc braking systems and convenient in operation and for storage within little space.
The main feature of the invention is to provide a tool set for replacing brake pads of disc braking systems including a screw rod, a sleeve, a first plate body, a second plate body, a guide rod, and at least one connector with various sizes, wherein the screw rod has one end combined with a sliding handle and the other end provided with a coupling portion as well as a tapered plane; the sleeve capable of being extended through and screwed by the screw rod has a hollow internal-threaded passage formed therein and a flange formed at one end; the first plate body capable of being extended through by the screw rod has a big-bore hole, a middle-bore screw hole and a small-bore hole orderly arranged from the center of the first plate body to one side of the first plate body; the second plate body capable of being extended through by one end of the second plate body capable of being extended through by one end of the screw rod has a first hole, a second hole and a third hole orderly arranged from the center of the second plate body to one side of the second plate body with their centers respectively aligned with those of the big-bore hole, the middle-bore screw hole and the small-bore hole of the first plate body; the guide rod capable of extending through the small-bore hole of the first plate body as well as the third hole of the second plate body disposed at an outer end of the second plate body has a connecting portion disposed at one end of the guide rod for being fixed to the first plate body; the connector has an insert hole formed in the center capable of being extended through and engaged by the coupling portion of the screw rod as well as at least one projection disposed in a proper position on one surface of the connector for being correspondingly fitted into and engaged with at least one engagement groove located in a front surface of a piston, by which a selective combination of the components described above is capable of providing an automobile with a specialized tool for pressing an outward piston to its initial position for replacing new brake pads when the outward piston is gradually traveled toward old brake pads with a continuous wearing in linings of the old brake pads.
REFERENCES:
patent: 4809567 (1989-03-01), Bongard
patent: 5003681 (1991-04-01), Schley
patent: 5018261 (1991-05-01), Markous
patent: 6085398 (2000-07-01), Arch
patent: 6192566 (2001-02-01), Dunum
patent: D457795 (2002-05-01), Mohammed
Rachuba M.
Shanley Daniel
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