EP0573162A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wheels for pneumatic tires
Assignee: Bridgestone Corp
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Filing: 1993-05-17
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Granted: —
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Expires: 2013-05-17
Abstract
Abstract A wheel for a pneumatic rubber tire comprises a bead seat (1), a flange (2), a bead seat radius (3) connecting the bead seat to the flange and a well (5), in which the bead seat pair has an oppositely taper relationship of extending toward the bead seat radius at a downwardly inclined gradient. When a tire is mounted onto such a wheel, the occurrence of radial run-out is reduced and also the radial force variation is mitigated to overcome vibration of a vehicle.
Inventors
- 👤 Ryohei Hibino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 19:39
CPC Classifications
B; B60; B60B; B60B1/00; B60B21/00; B60B21/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A wheel for a pneumatic rubber tire, comprising a pair of bead seats (1) and flanges (2) for receiving a pair of bead portions (6) of a tire upon fitting, and a bead seat radius (3) connecting the bead seat (1) to the flange (2) and having a sectionally concave arc corresponding to a radially sectional contour of a bead heel (7) in the bead portion (6) of the tire, in which said pair of bead seats (1) have an oppositely taper relationship extending toward said bead seat radius (3) at a downwardly inclined gradient, whereby a stable seating state of the bead heel is induced and held and also an interference of a toe (8) in said bead portion (6) is increased.
Claim 2
Dependent Claim
35 words
A wheel as claimed in claim 1, characterized in that said bead seat radius (3) includes a cylindrical surface portion of a short length adjoining to a downwardly extended end of said bead seat (1).
Claim 3
Dependent Claim
38 words
A wheel as claimed in claim 1 or 2, characterized in that the inclination angle of said bead seat (1) with respect to a bead base line of said bead portion (6) is within a range of 4-14°.
Claim 4
Dependent Claim
35 words
A wheel as claimed in any of claims 1 to 3, characterized in that said bead seat (1) is a rotating surface of an outwardly concave curve having a radius of curvature of 20-1000 mm.
Claim 5
Dependent Claim
50 words
A wheel as claimed in any of claims 1 to 4, characterized in that said flange (2) has an escape surface inclined outward with respect to a plane inclusive of a point defining a specified rim width on a bead base line perpendicular to a center axis of the wheel.
Claim 6
Dependent Claim
28 words
A wheel as claimed in claim 5, characterized in that the inclination angle of said escape surface with respect to the said plane is not more than 10°.
Claim 7
Dependent Claim
56 words
A wheel as claimed in any of claims 1 to 6, characterized in that a minimum diameter of the rim at said bead seat radius (3) is D-2.6 mm (tolerance: ±0.98 mm) with respect to a specified rim diameter D, and a maximum diameter of said bead seat is D+0.4 mm (tolerance: +0.6 mm, -0.2 mm).
References Cited (Backward Citations)
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