US4867217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonpneumatic elastic tire
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1988-07-28
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Granted: 1989-09-19
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Expires: 2008-07-28
Abstract
Abstract The elastic tire (1) is composed of a plurality of elastic elements (3) ped between the nondeformable anchoring zone (2) and the tread (4). Each elastic element (3) comprises two connecting elements (34) and (35) the ends of which form a quadrilateral and an arm (31) guided by the connecting elements and joined to the tread (4).
Inventors
- 👤 Daniel Laurent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
B; B60; B60C; B60C7/00; B60B; B60B9/00; B60B9/26; B60C7/10; B60C7/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
234 words
A nonpneumatic elastic tire having an axis of rotation, said nonpneumatic elastic tire comprising: (a) a nondeformable anchoring zone; (b) a tread; and (c) a plurality of elements forming springs disposed between said nondeformable anchoring zone and said tread, each one of said plurality of elements comprising: (i) a quadrilateral mounted on said nondeformable anchoring zone and (ii) an arm extending radially between said quadrilateral and said tread and connecting said quadrilateral to said tread, wherein: (d) two vertices of said quadrilateral constitute radially inner and outer anchoring points for the one of said plurality of elements of which that quadrilateral is a part, said anchoring points being radially fixed in relation to the axis of rotation of said nonpneumatic elastic tire; (e) the other two vertices of said quadrilateral constitute radially inner and outer connecting points for the corresponding arm, said attachment points being radially movable in relation to the axis of rotation of said nonpneumatic elastic tire; (f) said arm is fastened at its radially outer end to said tread; (g) the radially inner attachment point of each of said quadrilaterals is connected to the radially inner anchoring point of that one of said quadrilaterals by a first connecting element; and (h) the radially outer attachment point of each one of said quadrilaterals is connected to the radially outer anchoring point of that one of said quadrilaterals by a second connecting element.
Claim 2
Dependent Claim
234 words
A nonpneumatic elastic tire having an axis of rotation, said nonpneumatic elastic tire comprising: (a) a nondeformable anchoring zone; (b) a tread; and (c) a plurality of elements forming springs disposed between said nondeformable anchoring zone and said tread, each one of said plurality of elements comprising: (i) a quadrilateral mounted on said nondeformable anchoring zone and (ii) an arm extending radially between said quadrilateral and said tread and connecting said quadrilateral to said tread, wherein: (d) two vertices of said quadrilateral constitute radially inner and outer anchoring points for the one of said plurality of elements of which that quadrilateral is a part, said anchoring points being radially fixed in relation to the axis of rotation of said nonpneumatic elastic tire; (e) the other two vertices of said quadrilateral constitute radially inner and outer connecting points for the corresponding arm, said attachment points being radially movable in relation to the axis of rotation of said nonpneumatic elastic tire; (f) said arm is fastened at its radially outer end to said tread; (g) the radially inner attachment point of each of said quadrilaterals is connected to the radially inner anchoring point of that one of said quadrilaterals by a first connecting element; and (h) the radially outer attachment point of each one of said quadrilaterals is connected to the radially outer anchoring point of that one of said quadrilaterals by a second connecting element.
Claim 3
Dependent Claim
26 words
A nonpneumatic elastic tire according to claim 1 wherein each of one of said quadrilaterals is oriented in a plane which comprises the axis of rotation.
Claim 4
Dependent Claim
67 words
A nonpneumatic elastic tire according to claim 2 wherein: (a) said first and second connecting elements and said arms have sections; (b) the sections of said first and second connecting elements and of said arms are rectangular, having a large dimension and a small dimension, and flat; and (c) the large dimensions of said sections are oriented perpendicularly to a plane that comprises the axis of rotation.
Claim 5
Dependent Claim
37 words
A nonpneumatic elastic tire according to claim 1 wherein: (a) the junction of each arm with said tread comprises two extensions of said arm and (b) all the extensions are placed at least approximately in a cylinder.
Claim 6
Dependent Claim
19 words
A nonpneumatic elastic tire according to claim 4 wherein the connection between each extension and said arm is arc-shaped.
Claim 7
Dependent Claim
62 words
A nonpneumatic elastic tire according to claim 1 wherein the length of said first and second connecting elements, the position of said anchoring points, and the relative separation of said attachment points are determined so that each one of said arms, under pure radial stress, moves in such a way that the point of junction with said tread is moved only radially.
Claim 8
Dependent Claim
26 words
A nonpneumatic elastic tire according to claim 1 wherein at least one of the vertices of each one of said quadrilaterals is composed of a pseudojoint.
Claim 9
Dependent Claim
46 words
A nonpneumatic elastic tire according to claim 1 wherein each one of said plurality of elements comprises an additional elastic element placed between: (a) the anchoring zone of that element and (b) a point of that element that is mobile in relation to its anchoring zone.
Claim 10
Dependent Claim
22 words
A nonpneumatic elastic tire according to claim 8 wherein each one of said elastic elements comprises a blade stressed at one end.
Claim 11
Dependent Claim
29 words
A nonpneumatic elastic tire according to claim 8 wherein each one of said plurality of elements behaves in the radial direction like a spring having a constant reacting force.
Claim 12
Dependent Claim
18 words
A nonpneumatic elastic tire according to claim 4 wherein the extensions are oriented so as to form chevrons.
References Cited (Backward Citations)
DE73363C
Cited
US990444A
Cited
US1345912A
Cited
US1512820A
Cited
GB183765A
Cited
GB372719A
Cited
US2517475A
Cited
GB539743A
Cited
FR864699A
Cited
FR1372593A
Cited
US3234988A
Cited
FR1408503A
Cited
EP0206181A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |