US3811478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube wall
Assignee: Individual
•
Filing: 1971-11-11
•
Granted: 1974-05-21
•
Expires: 1991-11-11
Abstract
Abstract A tube wall is formed by spirally winding in abutting relationship a flexible hollow strip of substantially rectangular cross-sectional outline, the outside of the wound strip constituting the outer wall of the hose and the opposite the inner wall of the hose. The strip defines therein a continuous chamber and the inside of the strip is extended to form an extension terminating in an upwardly turned lip. Each of these lips is engaged with a slot in the inside wall of the adjacent strip turn to lock the turns of the strip against axial separation. The continuous chamber in the strip is filled with a suitable hardened plastic material.
Inventors
- 👤 S Ahlqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:07
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/16; F16L59/00; F16L59/02; F16L59/027; Y; Y10; Y10S; Y10S138/00; Y10S138/07; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/139; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A tube wall comprising a deformable box-shaped strip of substantially rectangular cross-sectional outline and defining therein a continuous chamber, said strip being helically wound with the turns of the strip in lengthwise abutting alignment to form a continuous tube wall, one side of the strip forming the outer tube wall and the strip side opposite thereto the inner tube wall, said opposite strip side being extended along its length past one of the inner corners of the strip to form a flat extension strip terminating in an upwardly turned lip and including intermediate its length a recess dividing said side into two parts, each of the lips engaging said recess in the opposite strip side of the respective adjacent turn of the strip and each of the extensions abutting with its inside surface against the juxtaposed part of said opposite strip side, and a hardened plastic material filling said chamber.
Claim 2
Dependent Claim
150 words
A tube wall comprising a deformable box-shaped strip of substantially rectangular cross-sectional outline and defining therein a continuous chamber, said strip being helically wound with the turns of the strip in lengthwise abutting alignment to form a continuous tube wall, one side of the strip forming the outer tube wall and the strip side opposite thereto the inner tube wall, said opposite strip side being extended along its length past one of the inner corners of the strip to form a flat extension strip terminating in an upwardly turned lip and including intermediate its length a recess dividing said side into two parts, each of the lips engaging said recess in the opposite strip side of the respective adjacent turn of the strip and each of the extensions abutting with its inside surface against the juxtaposed part of said opposite strip side, and a hardened plastic material filling said chamber.
Claim 3
Dependent Claim
39 words
The tube wall according to claim 1 wherein a lengthwise partition wall extending between the inner and the outer tube wall divides said chamber into two continuous sections, each of said sections being filled with said hardened plastic material.
Claim 4
Dependent Claim
29 words
The tube wall according to claim 2 wherein each of said recesses is in the form of a slot extending from said opposite strip side into said partition wall.
Claim 5
Dependent Claim
26 words
The tube wall according to claim 3 wherein the length of said juxtaposed part of said opposite strip side matches the length of the respective extension.
Claim 6
Dependent Claim
43 words
The tube wall according to claim 3 wherein said juxtaposed part of said opposite strip side is inwardly stepped relative to the other side part by a distance such that the sides of the strip forming the outer tube wall are all flush.
References Cited (Backward Citations)
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |