EP0159888B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Non-pneumatic tire
Assignee: Cessione uniroyal Goodrich Licensing Services Inc
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Filing: 1985-04-15
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Granted: 1991-03-13
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Expires: 2005-04-15
Abstract
No abstract record available.
Inventors
- 👤 Giles J. Page
- 👤 Richard Palinkas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 04:53
CPC Classifications
B; B60; B60C; B60C7/00; B60C7/24; B60C7/28; B60C15/00; B60C15/02; B60C15/0209; B60C15/0213; B60C15/0223; B60C7/10; B60C7/12; B60C7/26
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
237 words
A tire comprising an annular body of resilient elastomeric material, the body having a generally cylindrical outer member (18) at the outer periphery thereof, a generally cylindrical inner member (22) spaced radially inward from and coaxial with said outer member, a plurality of axially extending, circumferentially spaced-apart rib members (26) connected at their corresponding radially inner and outer ends to said inner and outer cylindrical members, and at least one web member (32) having opposite side faces, said web member having its radially inner and outer peripheries connected respectively to said inner and outer cylindrical members and being connected on at least one of its side faces to at least one of said rib members to thereby form with said rib member a load-carrying and cushioning structure for said outer cylindrical member, characterised in that said rib members (26) are generally inclined at an angle of about 15° to 75° to radial planes which intersect them at their radially inner ends, in that the rib members are formed with undercuts (34) at the junction of the rib members (26) with the outer and inner cylindrical members (18 and 22), and in that said elastomeric material has a Shore hardness value of from 80A to 50D, and a compression modulus at 0.5 shape factor and 10% compression of from 6.9 x 10 ³ to 344 x 10³ kPa, preferably from 20.7 x 10³ to 62.1 x 10³ kPa.
Claim 2
Dependent Claim
47 words
A tire as claimed in claim 1 wherein at any one of said junctions where the angle between the rib member and the respective cylindrical member is an acute angle the undercut is an arc of a circle having a radius of from 0.32 to 1.27 cm.
Claim 3
Dependent Claim
47 words
A tire as claimed in claim 1 wherein at any one of said junctions where the angle between the rib member and the respective cylindrical member is an obtuse angle the undercut is an arc of a circle having a radius of from 0.64 to 2.54 cm.
Claim 4
Dependent Claim
59 words
A tire as claimed in any one of the preceding claims in which the relationship between the outer radius of the outer member (18) and the radial distance (D) from the radially outer surface of the inner member (22) to the radially inner surface of the outer member (18) is governed by the formula r o /10⋞D⋞r o /2.
Claim 5
Dependent Claim
76 words
A tire as claimed in any one of the preceding claims wherein said web member (32) is planar, is perpendicular to the rotational axis of the tire and is positioned about half way intermediate the axial ends of said cylindrical members (18, 22), and wherein each of said rib members (26)extends axially of said web member and has a portion lying to each side of and connected to the respective side face of said web member.
Claim 6
Dependent Claim
53 words
A tire as claimed in claim 5 wherein the rib member portions (28) on one side of said web member each make the same angle to their respective intersecting radial planes as the rib member portions (30) on the other side of said web member each make to their respective intersecting radial planes.
Claim 7
Dependent Claim
62 words
A tire as claimed in claim 5 wherein the rib member portions (28) on one side of said web member each make an angle to their respective intersecting radial planes that is equal to but oppositely directed from the angle that the rib member portions (30) on the other side of said web member each make with their respective intersecting radial planes.
Claim 8
Dependent Claim
117 words
A tire as claimed in any one of claims 1 to 4 comprising first and second web members (64, 66) each being planar, being positioned perpendicular to the rotational axis of the tire, and having its inner and outer peripheries connected respectively to said inner and outer cylindrical members (22a, 18a), said first web member being positioned at one axial end of said inner and outer cylindrical members and being connected on one of its side faces to said rib members (28, 30) and said second web member being positioned at the other axial end of said inner and outer cylindrical members and being connected on one of its side faces to said rib members (28, 30).
Claim 9
Dependent Claim
131 words
A tire as claimed in claim 8 and further including a third planar web member (70) positioned perpendicular to the rotational axis of the tire and having opposite side faces, said third web member having its inner and outer peripheries connected respectively to said inner and outer cylindrical members (22b, 18b), said third web member being positioned about half way intermediate the axial ends of said cylindrical members, said rib members (28, 30) extending axially of and to each side of said third web member, a first set of rib member portions connecting said first web member (64) to one side of said third web member (70) and a second set of rib member portions connecting said second web member (66) to the other side of said third web member (70).
Claim 10
Dependent Claim
73 words
A tire as claimed in claim 8 or claim 9 wherein said rib member portions of said first and second sets (28, 30) are each of substantially equal axial length, each corresponding to about one-half of the axial length of the inner and outer cylindrical members, and wherein each rib member portion of each set makes an angle with its respective intersecting radial plane, all such angles being equal and being similarly directed.
Claim 11
Dependent Claim
93 words
A tire as claimed in claim 8 or claim 9 wherein said rib member portions of said first and second sets (28,30) are each of substantially equal axial length, each corresponding to about one-half of the axial length of the inner and outer cylindrical members, and wherein each rib member portion of each set makes an angle with its respective intersecting radial plane, all such angles being equal but the angles of rib member portions in the first set being oppositely directed to the angles of rib member portions in the second set.
Claim 12
Dependent Claim
86 words
A tire as claimed in any one of claims 1 to 4 wherein said web member (84, 90 or 92, 94 or 100, 102) is in the form of a frustrum of a right circular cone having as its principal axis the rotational axis of the tire, wherein said rib members (28, 30) extend axially of and to each side of said web member, and wherein said web member is connected on each of its side faces to respective portions of each of said rib members.
Claim 13
Dependent Claim
87 words
A tire as claimed in claim 12 and further including a second web member (86, 88 or 96, 98) in the form of a right circular cone having as its principal axis the rotational axis of the tire, said second web member having its inner and outer peripheries connected respectively to said inner and outer cylindrical members (22, 18) and being connected on each of its side faces to respective portions of each of said rib members (28, 30), the apices of said cones being oppositely directed.
Claim 14
Dependent Claim
21 words
A tire as claimed in claim 13 wherein said web members (84, 90 and 86, 88) intersect one another (figure 17).
Claim 15
Dependent Claim
26 words
A tire as claimed in claim 13 wherein said web members (92, 94 and 96, 98) are substantially in abutting relationship with one another (figure 18).
Claim 16
Dependent Claim
119 words
A tire as claimed in any one of claims 1 to 4 wherein said web member (104) forms a partial helix about the rotational axis of the tire, and further including a plurality of additional web members (104a etc. ) each of which forms a partial helix about the rotational axis of the tire, said rib members (26) extending axially of and to each side of said web members, each of said web members being connected on each of their side faces to a respective portion of at least one of said rib members, and each of said plurality of web members having its inner and outer peripheries connected respectively to said inner and outer cylindrical members (22, 18).
Claim 17
Dependent Claim
21 words
A tire as claimed in claim 16 wherein the projections of the helices of adjacent web member are non-intersecting (figure 21).
Claim 18
Dependent Claim
22 words
A tire as claimed in claim 16 wherein the projections of the helices of adjacent web members intersect one another (figure 22).
Claim 19
Dependent Claim
36 words
A tire as claimed in any one of claims 16 to 18 wherein each said rib member or portion thereof is inclined at an angle of from 20° to 45° to its respective intersecting radial planes.
Claim 20
Dependent Claim
49 words
A tire as claimed in any one of the preceding claims wherein said elastomeric material comprises a material selected from the group of materials comprising polyurethanes; natural rubber; polybutadienes; polyisoprenes; ethylene-propylene-non-conjugated diene terpolymers; copolymers of butadiene with acrylonitriles and with methacrylonitriles; styrenes and acrylates; and is preferably a polyurethane.
References Cited (Backward Citations)
No citation records indexed.
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