Patent US4934428A successfully refreshed from Google Patents.
US4934428A
Expired / Lapsed
US
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Heavy duty pneumatic radial tire
Assignee: Bridgestone Corp
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Filing: 1988-12-07
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Granted: 1990-06-19
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Expires: 2008-12-07
Abstract
Abstract A heavy duty pneumatic radial tire includes a toroidal carcass consisting of plies having cords arranged in parallel with each other, and a plurality of belt layers interposed between the carcass and a tread of the tire. At least one of the plies has turn-up portions folded about a pair of bead cores from inside to outside of the tire. The tire comprises a crown protective layer arranged between the belt layers and the tread. The crown protective layer comprises wave-form cords or wave-form filaments. The tire further comprises a cushion rubber layer arranged radially inward of the protective layer and made of a rubber having a modulus less than 70 kg/cm 2 under 100% elongated condition. A distance between cords of a radially outermost layer of the belt layers and the wave-form cords or the wave-form filaments of the radially innermost layer of the crown protective layer is more than 1.5 mm.
Inventors
- 👤 Yasutoshi Aoki
- 👤 Kuninobu Kadota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/0009; B60C15/0072; B60C9/00; B60C9/18; B60C9/20; B60C9/22; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/1081
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
183 words
A heavy duty pneumatic radial tire including a toroidal carcass consisting of plies having cords arranged in parallel with each other, at least one of the plies having turn-up portions folded about a pair of bead cores from inside to outside of the tire, and a plurality of belt layers interposed between said carcass and a tread of the tire, wherein said tire comprises a crown protective layer arranged between the belt layers and the tread and comprising wave-form cords which are undulated in the plane of said crown protective layer, and a cushion rubber layer arranged between the crown protective layer and the radially outermost layer of said belt layers and made of a rubber layer not having cords or filaments and comprising a rubber having a modulus of less than 70 kg/cm 2 under 100% elongated condition, and a thickness over an entire width of said protective layer as a distance between a radially inner surface of said wave-form cords and a radially outer surface of cords of the radially outermost layer of said belt layers being more than 1.5 mm.
Claim 2
Dependent Claim
183 words
A heavy duty pneumatic radial tire including a toroidal carcass consisting of plies having cords arranged in parallel with each other, at least one of the plies having turn-up portions folded about a pair of bead cores from inside to outside of the tire, and a plurality of belt layers interposed between said carcass and a tread of the tire, wherein said tire comprises a crown protective layer arranged between the belt layers and the tread and comprising wave-form cords which are undulated in the plane of said crown protective layer, and a cushion rubber layer arranged between the crown protective layer and the radially outermost layer of said belt layers and made of a rubber layer not having cords or filaments and comprising a rubber having a modulus of less than 70 kg/cm 2 under 100% elongated condition, and a thickness over an entire width of said protective layer as a distance between a radially inner surface of said wave-form cords and a radially outer surface of cords of the radially outermost layer of said belt layers being more than 1.5 mm.
Claim 3
Dependent Claim
29 words
A heavy duty pneumatic radial tire as set forth in claim 1, wherein said modulus of the rubber of said cushion rubber is more than 20 kg/cm 2 .
Claim 4
Dependent Claim
49 words
A heavy duty pneumatic radial tire as set forth in claim 1, wherein said distance between radially inner surface of said wave-form cords of the crown protective layer and a radially outer surface of cords of the radially outermost layer of the belt layers is more than 4.5 mm.
Claim 5
Dependent Claim
34 words
A heavy duty pneumatic radial tire as set forth in claim 1, wherein said crown protective layer comprises wave-form steel cords of amplitudes of about 6 mm and wave lengths of about 20 mm.
Claim 6
Dependent Claim
35 words
A heavy duty pneumatic radial tire as set forth in claim 1, wherein said crown protective layer comprises aromatic polyamide wave-form cords of amplitudes of about 6.7 mm and wave lengths of about 27 mm.
Claim 7
Dependent Claim
33 words
A heavy duty pneumatic radial tire as set forth in claim 1, wherein said cushion rubber layer is made of a rubber having modulus of about 35 kg/cm 2 under 100% elongated condition.
Claim 8
Dependent Claim
23 words
A heavy duty pneumatic radial tire as set forth in claim 6, wherein said rubber layer has a thickness of about 2.2 mm.
Claim 9
Dependent Claim
181 words
A heavy duty pneumatic radial tire including a toroidal carcass consisting of plies having cords arranged in parallel with each other, at least one of the plies having turn-up portions folded about a pair of bead cores from inside to outside of the tire, and a plurality of belt layers interposed between said carcass and a tread of the tire, wherein said tire comprises a crown protective layer arranged between the belt layers and the tread and comprising of wave-form filaments undulating in the plane of said crown protective layer, and a cushion rubber layer arranged between the crown protective layer and the radially outermost layer of said belt layers and made of a rubber layer not having cords or filaments and comprising a rubber having a modulus of less than 70 kg/cm 2 under 100% elongated condition, and a thickness over an entire width of aid protective layer as a distance between a radially inner surface of said wave-form filaments and a radially outer surface of cords of the outermost layer of said belt layers being more than 1.5 mm.
Claim 10
Dependent Claim
181 words
A heavy duty pneumatic radial tire including a toroidal carcass consisting of plies having cords arranged in parallel with each other, at least one of the plies having turn-up portions folded about a pair of bead cores from inside to outside of the tire, and a plurality of belt layers interposed between said carcass and a tread of the tire, wherein said tire comprises a crown protective layer arranged between the belt layers and the tread and comprising of wave-form filaments undulating in the plane of said crown protective layer, and a cushion rubber layer arranged between the crown protective layer and the radially outermost layer of said belt layers and made of a rubber layer not having cords or filaments and comprising a rubber having a modulus of less than 70 kg/cm 2 under 100% elongated condition, and a thickness over an entire width of aid protective layer as a distance between a radially inner surface of said wave-form filaments and a radially outer surface of cords of the outermost layer of said belt layers being more than 1.5 mm.
Claim 11
Dependent Claim
29 words
A heavy duty pneumatic radial tire as set forth in claim 8, wherein said modulus of the rubber of said cushion rubber is more than 20 kg/cm 2 .
Claim 12
Dependent Claim
50 words
A heavy duty pneumatic radial tire as set forth in claim 8, wherein said distance between a radially inner surface of said wave-form filaments of the crown protective layer and a radially outer surface of cords of the radially outermost layer of the belt layers is more than 4.5 mm.
Claim 13
Dependent Claim
35 words
A heavy duty pneumatic radial tire as set forth in claim 8, wherein said crown protective layer comprises wave-form steel filaments having an amplitude of approximately 6 mm and a wavelength of approximately 20 mm.
Claim 14
Dependent Claim
33 words
A heavy duty pneumatic radial tire as set forth in claim 8, wherein said cushion rubber layer is made of a rubber having modulus of about 35 kg/cm 2 under 100% elongated condition.
Claim 15
Dependent Claim
23 words
A heavy duty pneumatic radial tire as set forth in claim 12, wherein said rubber layer has a thickness of about 2.2 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |