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US4691752A Expired / Lapsed US ⏱️ 0.0 years remaining

Pneumatic radial tire

Assignee: Yokohama Rubber Co Ltd
•
Filing: 1985-04-29
•
Granted: 1987-09-08
•
Expires: 2005-04-29
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Abstract

Abstract A pneumatic radial tire comprises (1) a pair of left and right bead portions, (2) a pair of left and right side-wall portions continuing from the respective bead portions, (3) a tread portion positioned between the side-wall portions, (4) a carcass layer provided between the left and right bead portions a cord angle of which is substantially 90 degree in relation to the circumferential direction of the tire, (5) an auxiliary carcass layer a cord angle of which is substantially 0 degree in relation to the circumferential direction of the tire, being placed on the tread side of the carcass layer substantially to correspond to the tread portion, so that the carcass layer and the auxiliary carcass layer may be crossed substantially at a right angle to form a net structure, and (6) a belt reinforcement layer having a tensile ridigity, at the circumferential of the tire, of not less than 10 kg/mm2, being placed on the auxiliary carcass layer substantially to correspond to the tread portion.

Inventors

  • 👤 Kazuyuki Kabe
  • 👤 Tuneo Morikawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 09:38
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/18; B60C9/28; B60C9/1821; B60C9/20; B60C9/22; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10765; Y10T152/1081

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 218 words
A pneumatic radial tire which comprises: (1) a pair of left and right bead portions, (2) a pair of left and right side-wall portions, continuing from the respective bead portions, (3) a tread portion positioned between the side-wall portions, (4) a carcass layer provided between the left and right bead portions, a cord angle of which is substantially 90 degrees in relation to the circumferential direction of the tire, (5) an auxiliary carcass layer, a cord angle of which is substantially 0 degrees in relation to the circumferential direction of the tire, being placed on the tread side of the carcass layer substantially to correspond to the tread portion, so that the carcass layer and the auxiliary carcass layer may be crossed substantially at a right angle to form a net structure, and (6) a belt reinforcing layer constructed from rubber reinforced with short fibers having a length of not more than 50 mm to provide a tensile rigidity, at the circumferential direction of the tire, of not less than 10-kg/mm2, said belt reinforcing layer being placed on the auxiliary carcass layer substantially to correspond to the tread portion with all belt layers in addition to said auxiliary carcass layer having a cord angle which is substantially 0 degrees in relation to the circumferential direction of the tire.
Claim 2
Dependent Claim 218 words
A pneumatic radial tire which comprises: (1) a pair of left and right bead portions, (2) a pair of left and right side-wall portions, continuing from the respective bead portions, (3) a tread portion positioned between the side-wall portions, (4) a carcass layer provided between the left and right bead portions, a cord angle of which is substantially 90 degrees in relation to the circumferential direction of the tire, (5) an auxiliary carcass layer, a cord angle of which is substantially 0 degrees in relation to the circumferential direction of the tire, being placed on the tread side of the carcass layer substantially to correspond to the tread portion, so that the carcass layer and the auxiliary carcass layer may be crossed substantially at a right angle to form a net structure, and (6) a belt reinforcing layer constructed from rubber reinforced with short fibers having a length of not more than 50 mm to provide a tensile rigidity, at the circumferential direction of the tire, of not less than 10-kg/mm2, said belt reinforcing layer being placed on the auxiliary carcass layer substantially to correspond to the tread portion with all belt layers in addition to said auxiliary carcass layer having a cord angle which is substantially 0 degrees in relation to the circumferential direction of the tire.
Claim 3
Dependent Claim 13 words
The tire of claim 1 wherein said short fiber cords are carbon fibers.
Claim 4
Dependent Claim 14 words
The tire of claim 2 wherein said carcass layer is constructed with polyester cords.
Claim 5
Dependent Claim 15 words
The tire of claim 3 wherein said auxiliary carcass layer is constructed with nylon cords.

References Cited (Backward Citations)

US2826233A Cited
US2939502A Cited
GB1067582A Cited
US3682221A Cited
US3667529A Cited
US3677319A Cited
US4269646A Cited
US4262726A Cited
US4418735A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-09-07 1991-03-09 1991-09-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-09-07 1995-03-09 1995-09-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-09-07 1999-03-09 1999-09-08 $7700.00 Window Closed / Lapsed

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