Patent US3870346A successfully refreshed from Google Patents.
US3870346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conduit elbow
Assignee: Brown Boveri Sulzer Turbomaschinen AG
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Filing: 1973-11-12
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Granted: 1975-03-11
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Expires: 1993-11-12
Abstract
Abstract An elbow section for an insulated conduit comprising an external pipe, an internal pipe, and an insulating layer between the two pipes; a tension strip is looped about the internal pipe and secured to the external pipe as a support for accepting the forces of the flowing medium which act substantially radially outwardly on the internal pipe of the elbow section. Guides allowing to move the strip or the internal pipe only radially outwardly or inwardly along the bend plane of the elbow section are shown too.
Inventors
- 👤 Peter Kappeler
- 👤 Klaus Uhlig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:19
CPC Classifications
F; F16; F16L; F16L43/00; F16L59/00; F16L59/12; F16L59/14; F16L59/16; F16L59/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
An elbow section for an insulated conduit for a high pressure, high temperature medium which flows at high speed, the conduit including coaxial external and internal pipes spaced from each other by an intermediate layer of insulating material and the internal pipe containing apertures for equalizing the pressures acting on its inside and outside surfaces and thereby relieving it from pressure loading, the conduit having a longitudinal axis which changes direction in a bend plane in the region of the elbow section, and characterized by a support strip which is secured to the external pipe and is looped about a portion of the internal pipe so that it accepts and transmits to the external pipe the forces of the flowing medium which act radially outward on the internal pipe in the bend plane as a result of said direction change; and by guide means centered in the bend plane, reacting between the two pipes, and serving to allow movement of said portion of the internal pipe relatively to the external pipe only in the radial direction in the bend plane.
Claim 2
Dependent Claim
180 words
An elbow section for an insulated conduit for a high pressure, high temperature medium which flows at high speed, the conduit including coaxial external and internal pipes spaced from each other by an intermediate layer of insulating material and the internal pipe containing apertures for equalizing the pressures acting on its inside and outside surfaces and thereby relieving it from pressure loading, the conduit having a longitudinal axis which changes direction in a bend plane in the region of the elbow section, and characterized by a support strip which is secured to the external pipe and is looped about a portion of the internal pipe so that it accepts and transmits to the external pipe the forces of the flowing medium which act radially outward on the internal pipe in the bend plane as a result of said direction change; and by guide means centered in the bend plane, reacting between the two pipes, and serving to allow movement of said portion of the internal pipe relatively to the external pipe only in the radial direction in the bend plane.
Claim 3
Dependent Claim
180 words
An elbow section for an insulated conduit for a high pressure, high temperature medium which flows at high speed, the conduit including coaxial external and internal pipes spaced from each other by an intermediate layer of insulating material and the internal pipe containing apertures for equalizing the pressures acting on its inside and outside surfaces and thereby relieving it from pressure loading, the conduit having a longitudinal axis which changes direction in a bend plane in the region of the elbow section, and characterized by a support strip which is secured to the external pipe and is looped about a portion of the internal pipe so that it accepts and transmits to the external pipe the forces of the flowing medium which act radially outward on the internal pipe in the bend plane as a result of said direction change; and by guide means centered in the bend plane, reacting between the two pipes, and serving to allow movement of said portion of the internal pipe relatively to the external pipe only in the radial direction in the bend plane.
Claim 4
Dependent Claim
180 words
An elbow section for an insulated conduit for a high pressure, high temperature medium which flows at high speed, the conduit including coaxial external and internal pipes spaced from each other by an intermediate layer of insulating material and the internal pipe containing apertures for equalizing the pressures acting on its inside and outside surfaces and thereby relieving it from pressure loading, the conduit having a longitudinal axis which changes direction in a bend plane in the region of the elbow section, and characterized by a support strip which is secured to the external pipe and is looped about a portion of the internal pipe so that it accepts and transmits to the external pipe the forces of the flowing medium which act radially outward on the internal pipe in the bend plane as a result of said direction change; and by guide means centered in the bend plane, reacting between the two pipes, and serving to allow movement of said portion of the internal pipe relatively to the external pipe only in the radial direction in the bend plane.
Claim 5
Dependent Claim
31 words
An elbow section as defined in claim 1 in which the support strip is so arranged that it is loaded in tension by said forces it transmits to the external pipe.
Claim 6
Dependent Claim
53 words
An elbow section as defined in claim 2 in which the support strip has opposite ends which are secured to the external pipe at opposite sides of the bend plane; and said strip extends around only a portion of the internal pipe located radially outward of the conduit axis in the bend plane.
Claim 7
Dependent Claim
31 words
An elbow section as defined in claim 3 in which the ends of the strip are connected to the external pipe at locations arranged symmetrically with respect to the bend plane.
Claim 8
Dependent Claim
38 words
An elbow section as defined in claim 1 in which the support strip is looped about a portion of the internal pipe which supports a row of blades arranged to guide the flowing medium through said direction change.
Claim 9
Dependent Claim
22 words
An elbow section as defined in claim 1 in which the guide means includes a guide member fixed to the internal pipe.
Claim 10
Dependent Claim
45 words
An elbow section as defined in claim 1 in which the guide means includes a guide member fixed to the support strip; and means preventing relative movement between said portion of the internal pipe and the support strip in the direction of the conduit axis.
Claim 11
Dependent Claim
65 words
An elbow section as defined in claim 1 in which the support strip is looped about the internal pipe in a region wherein that pipe comprises two axially spaced pipe parts, and a sliding sleeve which is mounted on those parts and spans the gap between them, the sleeve being engaged by the support strip and being constrained to radial movement by the guide means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |