Hybrid elastic cable and process for manufacturing such a cable
AssigneeCalyf
InventorFrancis Cour
Life of this patent
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Abstract
Hybrid elastic cable comprising at least one elastic filament yarn (1) and at least one resistant filament yarn (2), the elastic filament yarn (1), at a maximum rate of elongation of the cable, is found to be wound in a helix around the resistant filament yarn (2) with a specific number of turns per linear meter of the cable (nsE) ranging between nsE−15% and nsE+15%, nsE being determined based on a specific formula, wherein the elastic filament yarn (1) moreover is also twisted about itself with a specific number of distinct turns about itself per linear meter of the cable ranging between nsE and 3×nsE, and the distinct turns about itself of the elastic filament yarn (1) is wound in the opposite direction from that of the said helix.
Claims16
A hybrid elastic cable comprising at least one filament yarn of a first type and at least one filament yarn of a second type, the at least one filament yarn of the first type having a lower degree of tenacity than that of the at least one filament yarn of the second type, and the at least one filament yarn of the second type having a lower degree of elasticity than that of the at least one filament yarn of the first type;
- the at least one filament yarn of the second type, when a predetermined maximum rate of elongation of the hybrid elastic cable is reached, is fully elongated and the at least one filament yarn of the first type is wound in a helix around the at least one filament yarn of the second type, wherein the at least one filament yarn of the first type with said predetermined maximum rate of elongation is wound in a helix around the at least one filament yarn of the second type with a specific number of turns per linear meter of the hybrid elastic cable ranging between nsE−15% and nsE+15%, nsE being determined based on the following formula:
- n
- sE
- =
- 1000
- π
-
- (
- φ
- e
- +
- φ
- K
- )
- ×
- K
- max
- ×
- (
- K
- max
- +
- 200
- )
- K
- max
- +
- 100
- in which nsE is a number of turns per meter for the at least one filament yarn of the first type, φe is the diameter in mm of the at least one filament yarn of the first type at rest, φK is the diameter in mm of the at least one filament yarn of the second type, and Kmax is the predetermined maximum rate of elongation of the hybrid elastic cable,
- the at least one filament yarn of the first type moreover being also twisted about itself with a specific number of distinct turns about itself per linear meter of the hybrid elastic cable ranging between nsE and 3×nsE, with the distinct turns about itself of the at least one filament yarn of the first type being wound in the opposite direction from that of the said helix,
- in a manner such that when the hybrid elastic cable is at rest, the at least one filament yarn of the second type is wound in a helix around the at least one filament yarn of the first type, without the separation of the at least one filament yarn of the second type from the at least one filament yarn of the first type or deformation of the hybrid elastic cable.
A process for manufacturing a hybrid elastic cable comprising at least one filament yarn of a first type and at least one filament yarn of a second type, the at least one filament yarn of the first type having a lower degree of tenacity than that of the at least one filament yarn of the second type, and the at least one filament yarn of the second type having a lower degree of elasticity than that of the at least one filament yarn of the first type;
- the at least one filament yarn of the second type, when a predetermined maximum rate of elongation of the hybrid elastic cable is reached, is fully elongated and the at least one filament yarn of the first type is wound in a helix around the at least one filament yarn of the second type, wherein the at least one filament yarn of the first type with said predetermined maximum rate of elongation is wound in a helix around the at least one filament yarn of the second type with a specific number of turns per linear meter of the hybrid elastic cable ranging between nsE−15% and nsE+15%, nsE being determined based on the following formula:
- n
- sE
- =
- 1000
- π
-
- (
- φ
- e
- +
- φ
- K
- )
- ×
- K
- max
- ×
- (
- K
- max
- +
- 200
- )
- K
- max
- +
- 100
- in which nsE is a number of turns per meter for the at least one filament yarn of the first type, φe is the diameter in mm of the at least one filament yarn of the first type at rest, φK is the diameter in mm of the at least one filament yarn of the second type, and Kmax is the predetermined maximum rate of elongation of the hybrid elastic cable,
- in a manner such that when the hybrid elastic cable is at rest, the at least one filament yarn of the second type is wound in a helix around the at least one filament yarn of the first type, without the separation of the at least one filament yarn of the second type from the at least one filament yarn of the first type or deformation of the hybrid elastic cable, said process comprising the following steps of:
- stretching the at least one filament yarn of the first type,
- twisting the at least one filament yarn of the first type about itself with a specific number of turns about itself per linear meter of the hybrid elastic cable ranging between nsE and 3×nsE, the turns about itself of the of the filament yarn of the first type being wound in the opposite direction from the turns of the said helix.
A manufactured object comprising at least one of a hybrid elastic cable comprising at least one filament yarn of a first type and at least one filament yarn of a second type, the at least one filament yarn of the first type having a lower degree of tenacity than that of the at least one filament yarn of the second type, and the at least one filament yarn of the second type having a lower degree of elasticity than that of the at least one filament yarn of the first type;
- the at least one filament yarn of the second type, when a predetermined maximum rate of elongation of the hybrid elastic cable is reached, is fully elongated and the at least one filament yarn of the first type is wound in a helix around the at least one filament yarn of the second type, wherein the at least one filament yarn of the first type with said predetermined maximum rate of elongation is wound in a helix around the at least one filament yarn of the second type with a specific number of turns per linear meter of the hybrid elastic cable ranging between nsE−15% and nsE+15%, nsE being determined based on the following formula:
- n
- sE
- =
- 1000
- π
-
- (
- φ
- e
- +
- φ
- K
- )
- ×
- K
- max
- ×
- (
- K
- max
- +
- 200
- )
- K
- max
- +
- 100
- in which nsE is a number of turns per meter for the at least one filament yarn of the first type, φe is the diameter in mm of the at least one filament yarn of the first type at rest, φK is the diameter in mm of the at least one filament yarn of the second type, and Kmax is the predetermined maximum rate of elongation of the hybrid elastic cable,
- the at least one filament yarn of the first type moreover being also twisted about itself with a specific number of distinct turns about itself per linear meter of the hybrid elastic cable ranging between nsE and 3×nsE with the distinct turns about itself of the at least one filament yarn of the first type being wound in the opposite direction from that of the said helix,
- in a manner such that when the hybrid elastic cable is at rest, the at least one filament yarn of the second type is wound in a helix around the at least one filament yarn of the first type, without the separation of the at least one filament yarn of the second type from the at least one filament yarn of the first type or deformation of the hybrid elastic cable.
Dependencies are inferred from the claim text.