Spring devices – Vehicle – Torsion
Reexamination Certificate
2000-12-26
2002-07-30
Butler, Douglas C. (Department: 3613)
Spring devices
Vehicle
Torsion
C267S154000, C267S276000
Reexamination Certificate
active
06425576
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority of Korea patent Application No. 2000-48292, filed on Aug. 21, 2000.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a rear wheel suspension system of a vehicle, and more particularly to a suspension arm bushing of a vehicle.
2. Description of the Prior Art
In general, a suspension system of a vehicle serves to connect an axle to a frame and to absorb shock and vibration received from road surface while the vehicle is running, thereby improving rideability and safety of the vehicle.
FIG. 1
is a perspective view for illustrating a suspension arm
10
applied to a rear wheel suspension system according to the prior art. The suspension arm
10
serves to control movement of wheels and is also called as “control arm”. The suspension arm
10
is integrally coupled at one side thereof by a bushing
20
to be screwed to body or axle by way of a bolt. The suspension arm
10
can be classified into “A” arm, “I” arm and the like according to its shape. The suspension arm
10
is usually made of pressed steel plate but can also be forged.
Rubber is generally used for a bushing
20
applied to a suspension arm, and is fixed between an outer pipe
22
and an inner pipe
24
as illustrated in FIG.
1
.
The suspension arm
10
, like other types of suspension system, absorbs shock or vibration coming from road bed.
However, there is a problem in the suspension arm bushing thus described according to the prior art in that the bushing is controlled by hardness and quantity of rubber, resulting in deformation thereof.
SUMMARY OF THE INVENTION
The present invention is disclosed to solve the aforementioned problem and it is an object of the present invention to provide a suspension arm bushing of a vehicle adapted to complement characteristics of bushing applied to the suspension arm to thereby reduce deformation thereof.
In accordance with the object of the present invention, there is provided a suspension arm bushing, the bushing comprising:
an outer pipe fixed to one end of a suspension arm;
an inner pipe positioned within the outer pipe; and
a clockwork-type cushion spring inserted between the outer pipe and the inner pipe, one end thereof being coupled to the outer pipe and another end thereof being coupled to the inner pipe, for absorbing external force transmitted to the outer pipe and the inner pipe.
REFERENCES:
patent: 2683033 (1954-07-01), Ashburn
patent: 2689755 (1954-09-01), Krotz
patent: 2751179 (1956-06-01), Oravec
patent: 3860353 (1975-01-01), Lukasik et al.
patent: 4768761 (1988-09-01), Kramer
patent: 5129799 (1992-07-01), Scheldorf
patent: 5413374 (1995-05-01), Pierce
patent: 5630574 (1997-05-01), Itakura
patent: 5839321 (1998-11-01), Siemons
patent: 6145858 (2000-11-01), Foulquier
Butler Douglas C.
Christie Parker & Hale LLP
Hyundai Motor Company
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