Patent US3583732A successfully refreshed from Google Patents.
US3583732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular duct longitudinal reinforcement and connector system
Assignee: Johns Manville Corp
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Filing: 1969-06-06
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Granted: 1971-06-08
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Expires: 1989-06-06
Abstract
Abstract One or more runs of wire are extended longitudinally of tubular duct and secured to the end structures thereof to provide longitudinal reinforcement against tensile forces imposed on the duct. Free ends of the wire extend beyond the duct to afford means to secure the end of the duct to associated elements of the connector system. Abutting duct ends are secured by tying their respective ends of wire together and sealing the abutting ends of duct with closure tape. Duct can be secured to metal or like solid structures by tying the wire to the structure and sealing the walls thereto with closure tape.
Inventors
- 👤 James Arnold Dennis
- 👤 James William Helmick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:27
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/153; F16L59/16; F16L59/18; F16L59/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A joint for coupling a pair of abutting ends of flexible tubular duct comprising; each of said ducts having a helical skeleton covered by an insulating blanket and a gas impermeable jacket enclosing said blanket, said helices at the abutting ends being bonded together in side-by-side relationship to define collars, a first wire looped around and secured to a first of said collars and extending therefrom, a second wire looped around and secured to a second of said collars, a junction tie between said wires, said tie being located beneath the outer jacket, and a closure tape bridging the joint between said ducts.
Claim 2
Dependent Claim
103 words
A joint for coupling a pair of abutting ends of flexible tubular duct comprising; each of said ducts having a helical skeleton covered by an insulating blanket and a gas impermeable jacket enclosing said blanket, said helices at the abutting ends being bonded together in side-by-side relationship to define collars, a first wire looped around and secured to a first of said collars and extending therefrom, a second wire looped around and secured to a second of said collars, a junction tie between said wires, said tie being located beneath the outer jacket, and a closure tape bridging the joint between said ducts.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |