Resilient tires and wheels – Tires – resilient – Armored
Utility Patent
1999-03-22
2001-01-02
Johnstone, Adrienne C. (Department: 1733)
Resilient tires and wheels
Tires, resilient
Armored
C152S327000
Utility Patent
active
06167931
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an improved inflation-free tire structure including a crude tire, a pair of wheel discs and a bearing for use on light duty vehicles. The crude tire is provided with additional multiple radial plies that are extended over and wound around the wire beads peripherally disposed the respective inner rims of a tire and further led to the middle or bottom portion of the rubber side walls of a tire so that the strength of the tire is reinforced. Each wheel disc provided with a flanged rim has a central through hole with a plurality of holes, such as four holes disposed on the periphery thereof so as to permit the bearing to be guided through the two wheel discs and fixed in place. The tire has a central hole with which a wheel disc is in snap engagement. The diameter of the rim of the central hole of the tire is smaller than the diameter of the flanged rim so that the tire can be sealedly engaged with each wheel disc.
The inflation-free tire of the present invention is applied to mowers, wheel chairs for the handicapped or vehicles of less carrying loads. It is equipped with a pair of wheel discs engaged with each sides of the tire with a bearing mounted between the wheel discs.
In general, a conventional tire is made up of an outer tire
20
and an inflatable inner tire
21
and a pair of wheel discs
10
. Such a prior art tire has the following disadvantages in practical use.
1. It is relatively complicated to assemble the tires and is high in labor cost and wasting of time in practical use.
2. It will deflate immediately on being punctured by a pointed object, resulting in imminent danger in driving.
Referring to
FIG. 2
, another prior art tire is illustrated in a sectional manner. The tire
20
has a radial ply
21
and a foamed PU block
22
disposed inside the tire
20
. This tire
20
has the disadvantages in use.
1. Its production process is complex and is produced at high cost and heavy in weight. The foamed PU material is poisonous and can not be recycled for use, causing serious environment pollution.
2. Water and air will be produced in the foaming process and accumulated in between the foamed PU and the tire
20
, so the tire
20
must be punctured on the side wall thereof so as to get water and air released. Such a puncture can damage the radial plies
21
between the tire
20
and the PU foam
22
, resulting in sabotage of the tire
20
.
SUMMARY OF THE INVENTION
The primary object of the present invention is to provide an improved inflation-free tire structure which has a crude tire made up of a surface layer, a buffer layer and an inner layer that are made of different materials and in various depths. Besides, the multiple radial plies on the rubber side walls of the tire can reinforce the tire and make the tire operated with comfort.
Another object of the present invention is to provide an improved inflation-free tire which is not filled with air so that it is free from the problems of leakage and explosion, making the use of the tire in a safer manner.
One further object of the present invention is to provide an improved inflation-free tire which is reinforced by multiple radial plies so as to make the deformation of the tire reduced when subject to heavy load, resulting in the reduction of contact surface of the tire with ground and prolonging of the operation life of the tire accordingly.
REFERENCES:
patent: 2650633 (1953-09-01), Eger
Bacon & Thomas PLLC
Johnstone Adrienne C.
Kings Glory Co., Ltd.
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