US3670772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacing in coaxial tubes system
Assignee: KM Kabelmetal AG
•
Filing: 1970-09-21
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Granted: 1972-06-20
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Expires: 1990-09-21
Abstract
Abstract Coaxial tubes are thermally insulated from each other by means of a spacer comprised of loosely piled tapes which have been sewn together, and helically wound on the respective inner tube.
Inventors
- 👤 Gerhard Ziemek
- 👤 Friedrich Schatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:19
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/02; F16L59/029; F16L59/027; F16L59/12; F16L59/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
Method of thermally insulating a first tube which is disposed in a second tube of larger diameter, comprising the steps of piling a plurality of tapes having low thermal conductivity to form a loosely piled stack of tapes; fastening the pates to each other by running a flexible thread through perforations of the tapes, the perforations being larger than the thread so that adjacent tapes may shift relative to each other to a limited extent; and helically disposing the stack of tapes on the first tube as spaceR for the second tube.
Claim 2
Dependent Claim
92 words
Method of thermally insulating a first tube which is disposed in a second tube of larger diameter, comprising the steps of piling a plurality of tapes having low thermal conductivity to form a loosely piled stack of tapes; fastening the pates to each other by running a flexible thread through perforations of the tapes, the perforations being larger than the thread so that adjacent tapes may shift relative to each other to a limited extent; and helically disposing the stack of tapes on the first tube as spaceR for the second tube.
Claim 3
Dependent Claim
14 words
Method as in claim 1, the fastening step consisting of sewing the tapes together.
Claim 4
Dependent Claim
23 words
Method as in claim 1 the fastening step carried by use of a needle having diameter larger than the diameter of the thread.
Claim 5
Dependent Claim
11 words
Method as in claim 1, using thread of a plastic material.
Claim 6
Dependent Claim
17 words
Method as in claim 1, including the step of heating the piled tapes during the fastening step.
Claim 7
Dependent Claim
31 words
Method as in claim 3, the fastening step carried out by running a single thread up and down and completely through the pile for each stitch in a meandering pattern therein.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |