US3686723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gears for crimping yarn
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-11-13
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Granted: 1972-08-29
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Expires: 1990-11-13
Abstract
Abstract Gears for crimping and in particular for crimping yarn in which at least one of the gears is an integral stepped structure having gear teeth on a portion of greater diameter and gear teeth on a portion of lesser diameter both sets of which teeth intermesh with teeth on another gear.
Inventors
- 👤 Alan Keith Dunnell
- 👤 David Greenwood
- 👤 Thomas C J Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:10
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
Crimping gears comprising two gears in meshing engagement for the imparting of rotary motion by one or more of said gears which is driven and for the imposing of crimp to a material running therebetween in which one of the said gears is an integral stepped structure having gear teeth on a portion of greater diameter and gear teeth on a portion of lesser diameter, the other gear being a straight spur gear meshing with the teeth on both portions of said one gear.
Claim 2
Dependent Claim
84 words
Crimping gears comprising two gears in meshing engagement for the imparting of rotary motion by one or more of said gears which is driven and for the imposing of crimp to a material running therebetween in which one of the said gears is an integral stepped structure having gear teeth on a portion of greater diameter and gear teeth on a portion of lesser diameter, the other gear being a straight spur gear meshing with the teeth on both portions of said one gear.
Claim 3
Dependent Claim
98 words
Apparatus for crimping a filament comprising an integral stepped gear having gear teeth on a portion of greater diameter and gear teeth on a portion of lesser diameter, and a straight spur gear having teeth in engagement with the teeth on the portion of greater diameter of the stepped gear to permit one of the gears to be driven by the other gear, and the straight spur gear teeth being in non-engaging meshing relationship with the teeth on the portion of lesser diameter of the stepped gear so as to be capable of imparting crimp to a filament.
Claim 4
Dependent Claim
98 words
Apparatus for crimping a filament comprising an integral stepped gear having gear teeth on a portion of greater diameter and gear teeth on a portion of lesser diameter, and a straight spur gear having teeth in engagement with the teeth on the portion of greater diameter of the stepped gear to permit one of the gears to be driven by the other gear, and the straight spur gear teeth being in non-engaging meshing relationship with the teeth on the portion of lesser diameter of the stepped gear so as to be capable of imparting crimp to a 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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |