# US 7,743,806 B2 · Non-pneumatic tire

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- Number: US 7,743,806 B2
- Document ID: US7743806B2
- Status: Granted
- Kind: B2
- Application number: 11/860,022
- Filed: 2007-09-24
- Published: 2008-03-27
- Granted: 2010-06-29
- Earliest claimed: 2006-09-25
- Assignees: Bridgestone Corporation
- Inventors: Akihiko Abe
- Web page: https://patentgrep.com/patent/US7743806B2

## CPC

- B60C 7/14: using springs
- Y10T 152/10: Tires, resilient
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A non-pneumatic tire having a rim member 1, a ring member 3 disposed at an outer circumferential side of the rim member 1 and provided with a tread 2 on a circumferential face, and a plurality of link mechanisms 4 coupling the rim member with the ring member. Each of the link mechanisms 4 contains a pair of link members 7a, 7b formed of a link 5a, 5b which is connected at a first end with a side portion of the rim member 1 and which is swingable in the circumferential and meridian directions and another link 6a, 6b which is connected at a first end with a side portion of the ring member and 3 which is swingable in the circumferential and meridian directions with second ends of the links being hingedly connected one another to make the links swingable in the meridian direction. A spring member 9 imparting a stiffness against relative displacements in the radian, circumferential and width directions with respect to the rim and ring members 1, 3 is provided on the link mechanisms 4.

## Claims

### Claim 1

A non-pneumatic tire comprising a rim member, a ring member disposed at an outer circumferential side of the rim member and provided with a tread on a circumferential face, and a plurality of link mechanisms circumferentially spaced at a given distance and coupling the rim member with the ring member, wherein
each of the link mechanisms comprises a pair of link members, each of the link members comprises a link which is connected at a first end with a side portion of the rim member and which is swingable in the meridian direction and in the circumferential direction and another link which is connected at a first end with a side portion of the ring member and which is swingable in the meridian direction and in the circumferential direction with respective second ends of the links being hingedly connected to one another to make the links swingable in the meridian direction, and elastic means for imparting a stiffness against relative displacements in the radian, circumferential and width directions with respect to the rim and ring members, the elastic means being connected to the link mechanisms,
wherein the elastic means comprises a spring member connecting respective hinge connections of the second ends of the links of the pair of link members with each other,
wherein the elastic means also comprises a torsion bar disposed between the respective hinge connections of the second ends of the links of the pair of link members by a pair of connecting rods each having a moment arm, such that a first moment arm and a second moment arm is provided, and
wherein the torsion bar is connected at one end to the first moment arm and is connected at another end to the second moment arm.

### Claim 2

A non-pneumatic tire comprising a rim member, a ring member disposed at an outer circumferential side of the rim member and provided with a tread on a circumferential face, and a plurality of link mechanisms circumferentially spaced at a given distance and coupling the rim member with the ring member, wherein
each of the link mechanisms comprises a pair of link members, each of the link members comprises a link which is connected at a first end with a side portion of the rim member and which is swingable in the meridian direction and in the circumferential direction and another link which is connected at a first end with a side portion of the ring member and which is swingable in the meridian direction and in the circumferential direction, with respective second ends of the links being hingedly connected to one another to make the links swingable in the meridian direction,
wherein a torsion bar is disposed between the respective hinge connections of the second ends of the links of the pair of link members by a pair of connecting rods each having a moment arm, such that a first moment arm and a second moment arm is provided,
wherein the torsion bar is connected at one end to the first moment arm and is connected at another end to the second moment arm.

### Claim 3

A non-pneumatic tire comprising a rim member, a ring member disposed at outer circumferential side of the rim member and provided with a tread on a circumferential face, and a plurality of link mechanisms circumferentially spaced at a given distance and coupling the rim member with the ring member, wherein
each of the link mechanisms comprises a pair of link members, each of the link members comprises a link which is connected at a first end with a side portion of the rim member and which is swingable in the meridian direction and in the circumferential direction and another link which is connected at a first end with a side portion of the ring member and which is swingable in the meridian direction and in the circumferential direction, with respective second ends of the links being hingedly connected to one another to make the links swingable in the meridian direction, an elastic means imparting a stiffness against relative displacements in the radian, circumferential and width directions with respect to the rim and ring members is provided on the link mechanisms, and a torsion bar is disposed between the respective hinge connections of the second ends of the links of the pair of link members by a pair of connecting rods each having a moment arm, such that a first moment arm and a second moment arm is provided,
wherein the torsion bar is connected at one end to the first moment arm and is connected at another end to the second moment arm.