Patent US4407528A successfully refreshed from Google Patents.
US4407528A
Expired / Lapsed
US
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High pressure insulating flange
Assignee: Phillips Petroleum Co
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Filing: 1981-12-14
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Granted: 1983-10-04
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Expires: 2001-12-14
Abstract
Abstract An easy to manufacture, strong, high pressure flange-type insulating coupling with wide separation between exposed metal parts is provided. The insulating coupling is made up of two metal half flanges supported on a nonconductive cylindrical nonmetallic member. The space between the two vertical ends of the half flanges is wound in typical fashion with plastic impregnated glass fibers to provide the necessary working strength.
Inventors
- 👤 Donald R. Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:44
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/026
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
A high pressure insulating coupling for use in a pipeline comprised of two metal half flanges, each of said half flanges having an outer face surface, an inner face surface, and an inner tubular extension, said half flanges being supported on a nonconductive cylindrical nonmetallic member in a manner such that the inner faces of said half flanges face each other and the inner tubular extensions point toward each other without touching each other, and plastic impregnated fiberglass windings around said inner tubular extensions between said inner face surfaces of said half flanges, said fiberglass windings and said cylindrical nonmetallic member forming a layer between said inner tubular extensions of sufficient thickness to withstand the working pressure of said pipeline.
Claim 2
Dependent Claim
120 words
A high pressure insulating coupling for use in a pipeline comprised of two metal half flanges, each of said half flanges having an outer face surface, an inner face surface, and an inner tubular extension, said half flanges being supported on a nonconductive cylindrical nonmetallic member in a manner such that the inner faces of said half flanges face each other and the inner tubular extensions point toward each other without touching each other, and plastic impregnated fiberglass windings around said inner tubular extensions between said inner face surfaces of said half flanges, said fiberglass windings and said cylindrical nonmetallic member forming a layer between said inner tubular extensions of sufficient thickness to withstand the working pressure of said pipeline.
Claim 3
Dependent Claim
54 words
The insulating coupling of claim 1 wherein said cylindrical nonmetallic member has an enlarged central portion having an outside diameter greater than the outside diameter of the remainder of said cylindrical nonmetallic member, said enlarged central portion being adapted to prevent said inner tubular extensions of said two half flanges from touching each other.
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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |