Patent US3856051A successfully refreshed from Google Patents.
US3856051A
Expired / Lapsed
US
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Flexible tube device
Assignee: Individual
•
Filing: 1973-01-18
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Granted: 1974-12-24
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Expires: 1993-01-18
Abstract
Abstract A flexible concentric pipe assembly in which one end of the inner pipe communicates with the outside of the outer pipe, with the remaining end of the inner pipe communicating with the inside of the outer pipe.
Inventors
- 👤 J Bain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/20; A; A61; A61M; A61M16/00; A61M16/0087; A61M16/009; A61M16/06; A61M16/08; F16L11/22; A61M16/0057; A61M16/0078
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A two limb flexible pipe comprising: a. a first flexible thin wall corrugated tubular member with connection means at either end, one of said means having a first and second passage means, first said passage means communicating through the interior of the tubular member with the other connector means; b. a second flexible essentially thick wall tubular member of smaller diameter generally disposed within the first tubular member, said second flexible member having one end communicating with the second passage means and its other end terminating in the vicinity of the other connector means to communicate thereat with the interior of the first flexible tubular member.
Claim 2
Dependent Claim
106 words
A two limb flexible pipe comprising: a. a first flexible thin wall corrugated tubular member with connection means at either end, one of said means having a first and second passage means, first said passage means communicating through the interior of the tubular member with the other connector means; b. a second flexible essentially thick wall tubular member of smaller diameter generally disposed within the first tubular member, said second flexible member having one end communicating with the second passage means and its other end terminating in the vicinity of the other connector means to communicate thereat with the interior of the first flexible tubular member.
Claim 3
Dependent Claim
18 words
The pipe of claim 1 wherein the first and second passage means are disposed within one connector means.
Claim 4
Dependent Claim
27 words
The pipe of claim 2 wherein the first flexible tubular member has an inner diameter of approximately twice the outer diameter of the second flexible tubular member.
Claim 5
Dependent Claim
16 words
The pipe of claim 3 wherein the first and second tubular members are composed of polyethylene.
Claim 6
Dependent Claim
46 words
The pipe of claim 1 further comprising means to constrain within said first flexible tubular member, the second flexible tubular member. 6. The pipe of claim 1 further comprising means connecting the second flexible tubular member to the inner walls of the first flexible tubular member.
Claim 7
Dependent Claim
13 words
The pipe of claim 6 wherein the connection means is a solvent bond.
References Cited (Backward Citations)
US3101902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |