US4378042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable bicycle tire having flexible beads
Assignee: Mitsuboshi Belting Ltd
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Filing: 1981-06-02
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Granted: 1983-03-29
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Expires: 2001-06-02
Abstract
Abstract An improved bicycle tire which can be folded for storage and transportation while maintaining the same running properties as a conventional tire. A plurality of bead cores made of a cord tensile member embedded in the bead section of the tire are provided by winding three to five turns of a cord tensile member having a low elongation ratio and high strength and which has been twisted one to two turns/10 cm in such a manner that the start and finish ends of the bead core overlap one another by 60 to 150 mm. The bead core preferably has a cut elongation of 5% or less and the strength of 300 kg/core.
Inventors
- 👤 Shoji Inae
- 👤 Harunori Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:04
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/0009; B60C15/0036; B60C15/0045; B29; B29D; B29D30/00; B29D30/06; B29D30/48; B29D2030/487; Y; Y10; Y10S; Y10S57/00; Y10S57/902; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10819
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A tire comprising: a plurality of bead cores made of a cord tensile member embedded in bead sections of said tire, each of said bead cores being fabricated by winding three to five turns of a cord tensile member, having a low elongation ratio and high strength and which has been twisted 1 to 2 turns/10 cm, in such a manner that the start end and the finish end of said bead core are overlapped 60 to 150 mm, said bead core having a cut elongation of 5% or less and a strength of 300 kg/core.
Claim 2
Dependent Claim
96 words
A tire comprising: a plurality of bead cores made of a cord tensile member embedded in bead sections of said tire, each of said bead cores being fabricated by winding three to five turns of a cord tensile member, having a low elongation ratio and high strength and which has been twisted 1 to 2 turns/10 cm, in such a manner that the start end and the finish end of said bead core are overlapped 60 to 150 mm, said bead core having a cut elongation of 5% or less and a strength of 300 kg/core.
Claim 3
Dependent Claim
20 words
The tire as claimed in claim 1 wherein said core tensile member is made of thin strands of hardened steel.
Claim 4
Dependent Claim
37 words
The tire as claimed in claim 1 wherein said core tensile member is a fibrous material which is selected from the group consisting of cords made of polyamide fiber strands, glass fiber strands and carbon fiber strands.
Claim 5
Dependent Claim
65 words
The tire as claimed in claim 1 further comprising a bead rubber member in which said bead cores are embedded wherein both sides of said bead cores are bonded fiber cords; said bead rubber member having two plys of carcass bias tire fabric surrounding said fiber cords; and a side wall rubber member and tread rubber member bonded to an outer surface of said carcass.
Claim 6
Dependent Claim
33 words
The tire of claim 1 wherein said cord tensile member is made of a material selected from the group consisting of thin strands of hardened steel, polyamide fibers, glass fibers and carbon fibers.
References Cited (Backward Citations)
FR992617A
Cited
US3446003A
Cited
US4022009A
Cited
US4098316A
Cited
US4293018A
Cited
US4320791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |