Tire containing at least part of an electrical current generator intended for the supply of sensors and/or other electrical devices present within the tire, and method for manufacture the said tire

• US 6,470,933 B1
• Filed: 03/08/1999
• Issued: 10/29/2002
• Est. Priority Date: 03/09/1998
• Status: Expired due to Fees

• Current Assignee: Pirelli Pneumatici S.P.A. (Pirelli & C SPA)
• Original Assignee: Pirelli Pneumatici S.P.A. (Pirelli & C SPA)
• Inventors: Volpi, Alessandro
• Primary Examiner(s): Maki, Steven D.
• Application Number:
  US09/263,500
• Time in Patent Office: 1,331 Days
• Field of Search: 152/152.1, 152/539, 152/540, 152/547, 156/136, 156/131, 156/130.7, 245/1.5
• US Class Current: 152/152.1
• CPC Class Codes: B29D 30/48 Bead-rings or bead-cores from wire B21F37/00; Treatment thereof prior to building the tyre
• CPC Class Codes: B60C 15/04 Bead cores
• CPC Class Codes: B60C 19/00 Tyre parts or constructions not otherwise provided for
• CPC Class Codes: B60C 2019/005 Magnets integrated within the tyre structure
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/041 Means for supplying power to the signal- transmitting means on the wheel
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: Y10T 152/10819 Characterized by the structure of the bead portion of the tire
• CPC Class Codes: Y10T 152/10846 Bead characterized by the chemical composition and or physical properties of elastomers or the like

Abstract

A tire for a vehicle wheel includes a toroidal carcass, a tread band, and a first inductive element of an electrical generator. At least one tire bead includes an annular core including a steel strip spirally wound to form at least two radially-superposed layers. The first inductive element includes at least one turn of conducting wire wound around a transverse profile of one of the annular cores. Alternatively, at least one tire bead includes an annular core including a matrix based on an elastomeric or plastomeric material, the matrix incorporating fibers, yarn, or cords, and containing ferromagnetic material in at least one of a powder form or a fibril form. The tire may include at least one electronic circuit operatively coupled to the first inductive element. A system for sensing and signaling one or more parameters associated with the tire and a method for producing the tire are also disclosed.

Claims

1. A tire for a vehicle wheel, comprising:

a toroidal carcass;

a tread band; and

a first inductive element of an electrical generator;

wherein the toroidal carcass comprises a pair of axially-opposing sidewalls terminating in beads allowing mounting of the tire on a corresponding rim,

wherein the tread band is disposed on a crown of the toroidal carcass and axially extends continuously between the sidewalls,

wherein at least one of the beads comprises an annular core comprising a steel strip spirally wound to form at least two radially-superposed layers, and

wherein the first inductive element comprises at least one turn of conducting wire wound around a transverse profile of the annular core.

2. The tire of claim 1, wherein the annular core further comprises one or more layers comprising a material with high magnetic permeability.

3. The tire of claim 2, wherein at least one of the layers comprising the material with high magnetic permeability is divided into more than one part.

4. The tire of claim 1, further comprising at least one device electrically connected to the first inductive element.

5. The tire of claim 1, further comprising at least one electronic circuit operatively coupled to the first inductive element.

6. The tire of claim 5, wherein the at least one electronic circuit comprises means for sensing one or more parameters associated with the tire.

7. The tire of claim 6, wherein the sensing means comprises at least one temperature sensor, at least one pressure sensor, or at least one temperature sensor and at least one pressure sensor.

8. The tire of claim 6, wherein the sensing means comprises a pair of extensometers oriented perpendicularly to each other to sense deformations of the annular core.

9. The tire of claim 5, wherein the at least one electronic circuit is fixed to the annular core.

10. The tire of claim 6, wherein the at least one electronic circuit comprises means for transmitting information related to at least one of the one or more parameters associated with the tire.

11. The tire of claim 1, wherein the first inductive element can be associated with at least one second inductive element to form the electrical generator, and

wherein the first inductive element is movable with respect to the second inductive element.

12. A tire for a vehicle wheel, comprising:

a toroidal carcass;

a tread band; and

a first inductive element of an electrical generator;

wherein the toroidal carcass comprises a pair of axially-opposing sidewalls terminating in beads allowing mounting of the tire on a corresponding rim,

wherein the tread band is disposed on a crown of the toroidal carcass and axially extends continuously between the sidewalls,

wherein at least one of the beads comprises an annular core comprising a matrix based on an elastomeric material or a plastomeric material,

wherein the matrix incorporates fibers, yarn, or cords, and contains ferromagnetic material in at least one of a powder form or a fibril form, and

wherein the first inductive element comprises at least one turn of conducting wire wound around a transverse profile of the annular core.

13. The tire of claim 12, wherein the annular core further comprises one or more layers comprising a material with high magnetic permeability.

14. The tire of claim 13, wherein at least one of the layers comprising the material with high magnetic permeability is divided into more than one part.

15. The tire of claim 12, further comprising at least one device electrically connected to the first inductive element.

16. The tire of claim 12, further comprising at least one electronic circuit operatively coupled to the first inductive element.

17. The tire of claim 16, wherein the at least one electronic circuit comprises means for sensing one or more parameters associated with the tire.

18. The tire of claim 17, wherein the sensing means comprises at least one temperature sensor, at least one pressure sensor, or at least one temperature sensor and at least one pressure sensor.

19. The tire of claim 17, wherein the sensing means comprises a pair of extensometers oriented perpendicularly to each other to sense deformations of the annular core.

20. The tire of claim 16, wherein the at least one electronic circuit is fixed to the annular core.

21. The tire of claim 17, wherein the at least one electronic circuit comprises means for transmitting information related to at least one of the one or more parameters associated with the tire.

22. The tire of claim 12, wherein the first inductive element can be associated with at least one second inductive element to form the electrical generator, and

wherein the first inductive element is movable with respect to the second inductive element.

23. A tire for a vehicle wheel, comprising:

a toroidal carcass;

a tread band;

a first inductive element of an electrical generator; and

at least one device electrically connected to the first inductive element;

wherein the toroidal carcass comprises a pair of axially-opposing sidewalls terminating in beads allowing mounting of the tire on a corresponding rim,

wherein the tread band is disposed on a crown of the toroidal carcass and axially extends continuously between the sidewalls,

wherein each of the beads comprises an annular core, and

wherein the first inductive element comprises at least one turn of conducting wire wound around a transverse profile of one of the annular cores.

24. A tire for a vehicle wheel, comprising:

a toroidal carcass;

a tread band;

a first inductive element of an electrical generator; and

at least one electronic circuit operatively coupled to the first inductive element;

wherein the toroidal carcass comprises a pair of axially-opposing sidewalls terminating in beads allowing mounting of the tire on a corresponding rim,

wherein the tread band is disposed on a crown of the toroidal carcass and axially extends continuously between the sidewalls,

wherein each of the beads comprises an annular core, and

wherein the first inductive element comprises at least one turn of conducting wire wound around a transverse profile of a first annular core.

25. The tire of claim 24, wherein the first annular core further comprises one or more layers comprising a material with high magnetic permeability.

26. The tire of claim 25, wherein at least one of the layers comprising the material with high magnetic permeability is divided into more than one part.

27. The tire of claim 24, wherein the at least one electronic circuit comprises means for sensing one or more parameters associated with the tire.

28. The tire of claim 27, wherein the sensing means comprises at least one temperature sensor, at least one pressure sensor, or at least one temperature sensor and at least one pressure sensor.

29. The tire of claim 27, wherein the sensing means comprises a pair of extensometers oriented perpendicularly to each other to sense deformations of the first annular core.

30. The tire of claim 24, wherein the at least one electronic circuit is fixed to the first annular core.

31. The tire of claim 27, wherein the at least one electronic circuit comprises means for transmitting information related to at least one of the one or more parameters associated with the tire.

32. The tire of claim 24, wherein the first inductive element can be associated with at least one second inductive element to form the electrical generator, and

wherein the first inductive element is movable with respect to the second inductive element.

33. A system for sensing and signaling one or more parameters associated with a tire for a vehicle wheel, comprising:

a tire, comprising;

a toroidal carcass;

a tread band; and

a first inductive element;

wherein the toroidal carcass comprises a pair of axially-opposing sidewalls terminating in beads allowing mounting of the tire on a corresponding rim,

wherein the tread band is disposed on a crown of the toroidal carcass and axially extends continuously between the sidewalls,

wherein each of the beads comprises an annular core, and

wherein the first inductive element comprises at least one turn of conducting wire wound around a transverse profile of one a first annular core;

a device for sensing one or more parameters associated with the tire; and

an electrical generator for providing power to the sensing device.

34. The system of claim 33, wherein at least one of the annular cores comprises a steel strip spirally wound to form at least two radially-superposed layers.

35. The system of claim 33, wherein at least one of the annular cores comprises a matrix based on an elastomeric material or a plastomeric material, and

wherein the matrix incorporates fibers, yarn, or cords, and contains ferromagnetic material in at least one of a powder form or a fibril form.

36. The system of claim 33, wherein the first inductive element can be associated with at least one second inductive element to form the electrical generator, and

wherein the first inductive element is movable with respect to the second inductive element.

37. The system of claim 36, wherein the at least one second inductive element comprises at least one permanent magnet.

38. The system of claim 36, wherein the at least one second inductive element comprises at least one electromagnet and at least one turn of conducting wire wound around a transverse profile of one of the at least one electromagnet to form at least one winding of the electrical generator.

39. The system of claim 38, wherein the at least one electromagnet is supplied with direct current.

40. The system of claim 38, wherein the at least one electromagnet is supplied with alternating current.

41. The system of claim 38, wherein the at least one electromagnet is supplied with direct current and alternating current.

42. A method for producing a tire, comprising the steps of:

producing semi-finished components for building a tire;

forming a first inductive element of an electrical generator; and

assembling the semi-finished components;

wherein the tire comprises a pair of ferromagnetic annular cores allowing mounting of the tire on a corresponding rim, and

wherein the step of forming the first inductive element comprises winding at least one turn of conducting wire around a transverse profile of at least one of the annular cores.

43. The method of claim 42, wherein at least one of the annular cores comprises a steel strip spirally wound to form at least two radially-superposed layers.

44. The method of claim 42, wherein at least one of the annular cores comprises a matrix based on an elastomeric material or a plastomeric material, and

wherein the matrix incorporates fibers, yarn, or cords, and contains ferromagnetic material in at least one of a powder form or a fibril form.

45. The method of claim 42, wherein the first inductive element can be associated with at least one second inductive element to form the electrical generator, and

wherein the first inductive element is movable with respect to the second inductive element.

46. The method of claim 42, further comprising the step of fixing means for sensing one or more parameters associated with the tire to a respective annular core,

wherein the electrical generator provides power to the sensing means.

47. The method of claim 42, further comprising the step of layering a material with high magnetic permeability on at least one of the annular cores,

wherein the step of layering the material with high magnetic permeability is completed before the step of forming the first inductive element is completed.