US5337776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline
Assignee: Lenzing AG
•
Filing: 1993-05-24
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Granted: 1994-08-16
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Expires: 2013-05-24
Abstract
Abstract A safety system for relieving over pressure in a pipeline carrying a congealable material, in which the pipeline is provided with a bursting disc located in a spur of the pipeline, the disc being mounted in a holder so that the surface of the disc forms part of the wall of the pipeline so that material passing down the pipeline washes the surface of the disc and keeps its clean.
Inventors
- 👤 Michael R. Perry
- 👤 Katharine A. Wykes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:03
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1759
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
85 words
In a method of transporting a congealable solution of cellulose in an aqueous tertiary amine oxide, through a pipeline, the improvement which comprises maintaining said solution at a temperature in excess of 80° C. and incorporating in said pipeline an over pressure device, the device comprising a surface displaceable under the action of pressure to form a vent for the pipeline, the surface being mounted in the pipeline so that part at least of the surface is washed by the solution passing through the pipeline.
Claim 2
Dependent Claim
85 words
In a method of transporting a congealable solution of cellulose in an aqueous tertiary amine oxide, through a pipeline, the improvement which comprises maintaining said solution at a temperature in excess of 80° C. and incorporating in said pipeline an over pressure device, the device comprising a surface displaceable under the action of pressure to form a vent for the pipeline, the surface being mounted in the pipeline so that part at least of the surface is washed by the solution passing through the pipeline.
Claim 3
Dependent Claim
33 words
In a method as claimed in claim 1 the improvement which comprises the provision of a plurality of said over pressure devices separated by distance in the range half metre to thirty metres.
Claim 4
Dependent Claim
18 words
In a method as claimed in claim 1 the improvement which comprises forming said surface as a disc.
Claim 5
Dependent Claim
47 words
In a method as claimed in claim 3 the improvement which comprises forming said disc as a bursting disc mounted in a holder inserted into a branch of said pipeline, wherein the surface of said disc is in part substantially flush with the inside of said pipeline.
Claim 6
Dependent Claim
30 words
In a method as claimed in claim 4 the improvement which comprises forming said branch with a flange, the holder having a co-operating flange, the two flanges being bolted together.
Claim 7
Dependent Claim
18 words
In a method as claimed in claim 5; the improvement which comprises providing the disc of stainless steel.
Claim 8
Dependent Claim
20 words
In a method as claimed in claim 6 the improvement which comprises electron beam welding said disc into said holder.
Claim 9
Dependent Claim
79 words
A pipeline for the transport of a solution of cellulose in an aqueous organic solvent wherein the pipeline is provided with a plurality of over pressure devices, some at least of the devices comprises a disc displaceable under the action of pressure to form a vent for the pipeline, the disc being mounted in the pipeline and so positioned that a part at least of the surface of the disc is washed by the solution passing through the pipeline.
Claim 10
Dependent Claim
79 words
A pipeline for the transport of a solution of cellulose in an aqueous organic solvent wherein the pipeline is provided with a plurality of over pressure devices, some at least of the devices comprises a disc displaceable under the action of pressure to form a vent for the pipeline, the disc being mounted in the pipeline and so positioned that a part at least of the surface of the disc is washed by the solution passing through the pipeline.
Claim 11
Dependent Claim
44 words
A pipeline as claimed in claim 8 in which the disc is a bursting disc mounted in a holder inserted into a branch of the pipeline so that the surface of the disc is in part substantially flush with the inside of the pipeline.
Claim 12
Dependent Claim
36 words
A pipeline as claimed in claim 9 in which the branch further extends into a contained receptacle downstream of the flange into which product may be relieved in the event of bursting of the bursting disc.
Claim 13
Dependent Claim
24 words
A pipeline as claimed in claim 10 in which the extension of the branch is maintained at a temperature in excess of 80° C.
References Cited (Backward Citations)
DE459264C
Cited
US1655433A
Cited
US1765883A
Cited
US2552110A
Cited
US4246221A
Cited
GB2185287A
Cited
DE3630057A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |