US3699768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic metal filament yarn
Assignee: Pall Filtration and Separations Group Inc
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Filing: 1971-02-24
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Granted: 1972-10-24
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Expires: 1991-02-24
Abstract
Abstract An elastic metal filament yarn, compatible with any natural and/or synthetic filamentary yarn or composite material, consisting of a plurality of outer peripheral metal filaments and at least one central metal filament located along the axis of the filament yarn, where said outer filaments are helically twisted around the yarn axis defining a void therein, wherein the outer metal filaments will collapse toward the central filament when axial tension is applied to the yarn.
Inventors
- 👤 John A Roberts
- 👤 Peter R Roberts
- 👤 James E Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:45
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/06; D07B1/0606; D07B1/062; D02; D02G; D02G3/00; D02G3/02; D02G3/12; D02G3/44; D02G3/48; D07B1/0633; D07B2201/00; D07B2201/20; D07B2201/2047; D07B2201/2052; D07B2201/2059; D07B2401/00; D07B2401/20; D07B2401/2005; Y; Y10; Y10S; Y10S57/00; Y10S57/901; Y10S57/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
20 words
An elastic filament yarn as recited in claim 1 wherein the outer filaments and central filament are made of metal.
Claim 2
Dependent Claim
34 words
An elastic filament yarn as recited in claim 2 wherein the central filament can be stressed to its ultimate tensile stress and broken prior to stressing the outer filaments to their tensile yield stress.
Claim 3
Dependent Claim
54 words
An elastic filament yarn as recited in claim 1 wherein the plurality of outer filaments are preselectively arranged in the filament yarn prior to being helically twisted around said central axis, such that upon application of axial tension along said filament yarn the outer filaments will geometrically elongate uniformly and be substantially equally stressed.
Claim 4
Dependent Claim
123 words
A yarn having a plurality of filaments comprising: at least one central filament centrally located along the central axis of said yarn and breakable upon application of sufficient axial tension; an expendable matrix material surrounding said central filament; and a plurality of outer filaments surrounding said expendable matrix material in a preselected arrangement and helically twisted with respect to the central filament, said outer filaments substantially defining the peripheral region of said yarn, wherein the expendable matrix material is removeable from the yarn, resulting in a yarn having a void left between the outer filaments and central filament defining space through which the outer filaments can reversibly move toward the central axis yarn application of sufficient axial tension to break said central filament.
Claim 5
Dependent Claim
34 words
A filament yarn as recited in claim 5 wherein the expendable matrix material is made of a leachable metal material and the outer filaments and central filament are made of a non-leachable metal material.
Claim 6
Dependent Claim
32 words
A filament yarn as recited in claim 6 wherein said outer filaments are preselectively arranged in the peripheral region of said yarn matrix prior to being helically twisted around said central axis.
Claim 7
Dependent Claim
75 words
A textile material comprising: an elastic metal filament yarn plied with organic yarn, said metal filament yarn comprising; a plurality of outer filaments preselectively helically twisted filament yarn and defining a void therein; and at least one central filament centrally located along the central axis of said void; wherein said elastic metal filament yarn has geometric elongation properties substantially equal to the elongation properties of the organic yarn, thereby making them compatible with each other.
Claim 8
Dependent Claim
28 words
A textile material as recited in claim 8 wherein said elastic metal filamentary yarn has geometric elongation properties less than the elongation properties of the organic filamentary yarn.
Claim 9
Dependent Claim
28 words
A textile material as recited in claim 8 wherein said elastic metal filamentary yarn has geometric elongation properties greater than the elongation properties of the organic filamentary yarn.
Claim 10
Dependent Claim
69 words
An elastic yarn comprising: a plurality of helically twisted flexible resilient exterior filaments wherein the internal surface thereof defines a central core passage parallel with the axis of the yarn; at least one central core filament in the passage in a spaced relationship with respect to the internal surface of the filaments; and means for preventing the helical filaments from becoming untwisted when an axial load is applied thereto.
Claim 11
Dependent Claim
75 words
A plurality of helically twisted exterior filaments wherein the internal surface thereof defines a central passage parallel to the axis of the yarn; at least one central core filament in the passage in a spaced relationship with respect to the internal surface of the helical filaments; and a matrix material substantially surrounding the core filament and filling the passage, the matrix material capable of being sacrificially removed from the helical filaments and the core filament.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |