Resilient tires and wheels – Tires – resilient – Cushion and pneumatic combined
Reexamination Certificate
1999-06-29
2001-04-03
Knable, Geoffrey L. (Department: 1733)
Resilient tires and wheels
Tires, resilient
Cushion and pneumatic combined
C152S159000, C152S195000, C152S317000, C152S512000
Reexamination Certificate
active
06209600
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to vehicle tires, and more particularly to an inner tube for a vehicle tire which improves the drawbacks of U.S. patent application Ser. No. 09/165,740, entitled “Inner tube with multiple air cells and breakers for protection against piercing of an external pointed object”.
The inner tube according to U.S. patent application Ser. No. 09/165,740, has multiple air cells and breakers for protection against piercing of an external pointed object. This structure of inner tube is functional, however it still has drawbacks as outlined hereinafter.
1. The multi-cell rubber tube comprises a plurality of big arched cells and a plurality of small arched cells alternatively arranged around the center through hole thereof, a plurality of rubber blocks respectively plugged into the big arched cells, a plurality of glued breakers respectively plugged into the small arched cells, and a layer of patching agent covered over the arched cells to seal the rubber blocks and the glued breakers inside the cells. This complicated structure consumes much manpower and time during its assembly process.
2. The breakers are made of resilient metal or like material, and fastened to the small arched cells in the multi-cell rubber tube. Because the breakers are not flexible, they cannot be flexibly deformed to fit the deformation of the vehicle tire when the vehicle tires runs on the road. In order to fit the deformation of the vehicle tire, the breakers must be made of expensive material, thereby causing the manufacturing cost of the inner tube unable to be reduced to a reasonable level.
3. The base for the inner tube is made of rubber air balls fastened together, and comprised of two opposite outer walls arranged in parallel, two opposite inner walls respectively connected to the outer walls at an inner side, an annular master air chamber connected between the outer walls around the inner walls, a circular center through hole defined within the annular master air chamber, and a plurality of rubber coated breakers fastened to the inside of the outer walls and retained between the outer walls and the inner walls. This design has same drawbacks as stated above.
SUMMARY OF THE INVENTION
According to one aspect of the present invention, the inner tube comprises a base having air chambers in two opposite side walls thereof and zigzag insertion slots around the periphery of each of the side walls, a multi-cell rubber tube mounted on the base between its side walls and defining a plurality of zigzag insertion slots arranged one over another around a center opening thereof and an annular insertion slot surrounding the zigzag insertion slots for mounting patching glue, and a plurality of breaker assembles respectively mounted in the zigzag insertion slots in the base and the multi-cell rubber tube. According to another aspect of the present invention, each breaker assembly is comprised of a flexible, zigzag base pad formed of a plurality of air balls, and two sets of breakers alternatively arranged at top and bottom side walls of the zigzag base pad in a stagger. Because the base pad of each breaker assembly is flexible, the breaker assemblies can be flexibly deformed to fit the deformation of the vehicle tire when running on the road.
REFERENCES:
patent: 1061204 (1913-05-01), Smith et al.
patent: 1216826 (1917-02-01), McTaggart
patent: 1444892 (1923-02-01), Westgate et al.
patent: 1499793 (1924-07-01), Taylor
patent: 1808404 (1931-06-01), Freerksen
patent: 3256123 (1966-06-01), Hart
patent: 5031679 (1991-07-01), Shoner
Knable Geoffrey L.
Rosenberg , Klein & Lee
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