Patent US2303688A successfully refreshed from Google Patents.
US3559693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windable flexible shaft capable of withstanding high tractive forces and torsional stresses
Assignee: IFP Energies nouvelles
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Filing: 1968-04-30
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Granted: 1971-02-02
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Expires: 1988-04-30
Abstract
Abstract This flexible shaft includes a flexible core surrounded with at least one armoring constituted of at least two layers of helically wound metallic wires or cables. This shaft is characterized in that each armoring layer is provided with an anchoring layer wherein it is embedded, this anchoring layer being constituted of an elastomeric or thermoplastic material which has been subjected to a thermal treatment, in combination with a thin hooping and separating layer which covers the armoring layer and is constituted of a material which can withstand the thermal treatment without flowing, this material preferably retracting under the conditions of this thermal treatment.
Inventors
- 👤 Remi Reynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:31
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/081; F16L11/083; E; E21; E21B; E21B17/00; E21B17/20; F16C; F16C1/00; F16C1/02; F16C1/10; F16C1/20; F16C2352/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
109 words
A windable flexible shaft capable of withstanding high mechanical stresses, comprising: a flexible core; a plurality of armoring layers of metallic wires helically wound about said core; first and second anchoring layers of heat-treated flexible material surrounding said core into which first and second layers of said plurality of layers of metallic wires are respectively embedded; and means for covering said first anchoring layer and for slidably separating said second anchoring layer from said first anchoring layer, to thereby prevent binding between said first and second anchoring layers during the application of heat thereto and to provide said shaft with good flexibility through relative sliding between said anchoring layers.
Claim 2
Dependent Claim
109 words
A windable flexible shaft capable of withstanding high mechanical stresses, comprising: a flexible core; a plurality of armoring layers of metallic wires helically wound about said core; first and second anchoring layers of heat-treated flexible material surrounding said core into which first and second layers of said plurality of layers of metallic wires are respectively embedded; and means for covering said first anchoring layer and for slidably separating said second anchoring layer from said first anchoring layer, to thereby prevent binding between said first and second anchoring layers during the application of heat thereto and to provide said shaft with good flexibility through relative sliding between said anchoring layers.
Claim 3
Dependent Claim
29 words
A windable flexible shaft according to claim 1, wherein said means comprises a hooping layer made of a material resistant to the application of heat to said anchoring layers.
Claim 4
Dependent Claim
17 words
A flexible shaft in accordance with claim 2, wherein said material constituting said hooping layer is polyethyleneterephtalate.
Claim 5
Dependent Claim
17 words
A flexible shaft in accordance with claim 2, wherein said material constituting said hooping layer is rayon.
Claim 6
Dependent Claim
17 words
A flexible shaft in accordance with claim 2, wherein said material constituting said hooping layer is cotton.
Claim 7
Dependent Claim
16 words
A flexible shaft in accordance with claim 2, wherein said hooping layer is made of glass-fiber.
Claim 8
Dependent Claim
17 words
A flexible shaft in accordance with claim 2, wherein the material constituting said hooping layer is nylon.
Claim 9
Dependent Claim
35 words
A flexible shaft in accordance with claim 2, wherein said hooping layer is at least on one of its sides separated from the wires constituting each armoring layer by a small thickness of elastomeric material.
Claim 10
Dependent Claim
16 words
A flexible shaft in accordance with claim 1, wherein said core of said shaft is tubular.
Claim 11
Dependent Claim
56 words
A flexible shaft in accordance with claim 1, further including a hooping layer covering the armoring layer most remote from the shaft axis which has a discontinuous structure and is covered with an external coating of elastic material and which is integral with the anchoring layer of said armoring layer most remote from the shaft axis.
Claim 12
Dependent Claim
53 words
A flexible shaft in accordance with claim 1, further including a hooping layer covering the armoring layer most remote from the shaft axis, having a discontinuous structure and covered with an external coating of thermoplastic material, which is integral with the anchoring layer of said armoring layer most remote from the shaft axis.
Claim 13
Dependent Claim
35 words
A flexible shaft in accordance with claim 1, wherein said hooping layer is at least on one of its sides separated from the wires constituting each armoring layer by a small thickness of thermoplastic material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |