Patent US3578028A successfully refreshed from Google Patents.
US3578028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced hose and method of making the same
Assignee: Fred T Roberts and Co
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Filing: 1969-07-16
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Granted: 1971-05-11
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Expires: 1989-07-16
Abstract
Abstract A tubular flexible hose of elastomeric material and the method of making the same, said hose having a reinforcing layer of warp knit net fabric. It can have a helical spring wire under the fabric. The hose is highly resistant to bursting under internal pressure, and has substantially no axial extension and only slight radial stretch and can be readily manufactured.
Inventors
- 👤 Robert E Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:31
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/112; D; D04; D04B; D04B21/00; D04B21/10; F16L11/08; F16L11/085; D10; D10B; D10B2505/00; D10B2505/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A tubular, flexible hose comprising a body of elastomeric material having embedded therein a reinforcing layer comprising a warp knit net fabric having rows of spaced, circumferentially aligned pillars with the pillars of one row offset from the pillars in the adjacent rows and the ends of the pillars in adjacent rows being connected by stitches and forming diagonally arranged series of openings, said hose having high resistance to bursting under internal pressure, substantially no axial stretch, and slight radial stretch.
Claim 2
Dependent Claim
81 words
A tubular, flexible hose comprising a body of elastomeric material having embedded therein a reinforcing layer comprising a warp knit net fabric having rows of spaced, circumferentially aligned pillars with the pillars of one row offset from the pillars in the adjacent rows and the ends of the pillars in adjacent rows being connected by stitches and forming diagonally arranged series of openings, said hose having high resistance to bursting under internal pressure, substantially no axial stretch, and slight radial stretch.
Claim 3
Dependent Claim
20 words
The invention as defined in claim 1 wherein the hose has a smooth internal bore and a smooth external surface.
Claim 4
Dependent Claim
19 words
The invention as defined in claim 1 wherein the hose has a helically corrugated internal bore and external surface.
Claim 5
Dependent Claim
23 words
The invention as defined in claim 1 wherein the reinforcing layer has a spiral spring disposed between layers of warp knit net fabric.
Claim 6
Dependent Claim
18 words
The invention as defined in claim 4 wherein the hose has a smooth internal bore and external surface.
Claim 7
Dependent Claim
30 words
The invention as defined in claim 4 wherein the hose has a smooth internal bore and corrugated external surface with the spring wires disposed in the crests of the corrugations.
Claim 8
Dependent Claim
31 words
The invention as defined in claim 3 wherein the reinforcing layer has a helical spring over the warp knit net fabric with the spring located in the troughs of the corrugations.
Claim 9
Dependent Claim
31 words
The invention as defined in claim 3 wherein the reinforcing layer has a helical spring over the warp knit net fabric with the spring located in the crests of the corrugations.
References Cited (Backward Citations)
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US1201803A
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US1669051A
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US1814224A
Cited
US3115898A
Cited
US3083736A
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US3349806A
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |