Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Reexamination Certificate
1996-12-18
2001-02-13
Lorin, Francis J. (Department: 1775)
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
C152S158000
Reexamination Certificate
active
06186206
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tire and a tube wherein the tire is mounted on an outer periphery of a rim and the tube is stored in a space formed by the rim and the tire.
2. Description of Background Art
A tire including a tube are normally mounted on a wheel rim having wire spokes. Such a tire is widely in use together with a motorcycle or a bicycle. The airtightness of this arrangement using a tube is excellent.
In the meantime, when a load in the radial direction is exerted on the wheel mounted with the tire and a tube, the tire and the tube are deformed by the load. Especially, when the tire traverses a solid hazard such as a rock etc. in traveling over off-road places and when the vehicle jumps and touches the ground, the tube is strongly squeezed between the considerably deformed tire and the rim made of metal. A “rim bumping phenomenon” may occur in which the inner wall faces of the tube are mutually brought into contact. When the inner wall faces of the tube are mutually brought into contact by the rim bumping phenomenon, the portion is perforated and a so-called “shock puncture” occurs.
To avoid such a drawback there has been proposed a tire in which a buffer having a crescent-shaped section is interposed between the inner surface of the tread portion of the tire and the outer surface of the tube and the damage of the tube caused by the above-mentioned rim bumping phenomenon is prevented by the buffer. See Japanese Unexamined Patent Publication No. 201213/1993.
However, according to the conventional tire the number of parts is increased by providing a buffer which gives rise to an increase in the weight of the tire and an increase in production cost.
SUMMARY AND OBJECTS OF THE INVENTION
The present invention has been carried out in view of the above-mentioned situation and it is an object thereof to provide a tire including a tube capable of simply and firmly preventing the occurrence of puncture caused by the mutual contact of the wall faces of the tube.
To achieve the above-mentioned object, the present invention provides a tube including a tire comprising a tire mounted on an outer periphery of a rim and a tube stored in a space formed by the rim and the tire, wherein thick wall portions are formed at at least one of inner wall faces of the tube which are mutually brought into contact by being squeezed by the tire and the rim when a load in the radial direction is exerted on the tire.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 598460 (1898-02-01), Young
patent: 730474 (1903-06-01), Rayner
patent: 1125129 (1915-01-01), Kush
patent: 1330732 (1920-02-01), Wise
patent: 1332309 (1920-03-01), Sawyer
patent: 1829483 (1931-10-01), Hibbert
patent: 3400746 (1968-09-01), Heimovics
patent: 4059138 (1977-11-01), Mirtain et al.
patent: 4203481 (1980-05-01), Ranik, Jr.
patent: 4399851 (1983-08-01), Bschorr
patent: 5-201213 (1993-08-01), None
Suzuki Kazuo
Takahashi Hirohisa
Yamagiwa Toshio
Birch & Stewart Kolasch & Birch, LLP
Honda Giken Kogyo Kabushiki Kaisha
Lorin Francis J.
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