US4699178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low volumetric expansion hose
Assignee: Parker Intangibles LLC
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Filing: 1986-12-08
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Granted: 1987-10-13
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Expires: 2006-12-08
Abstract
Abstract A high burst strength flexible composite hose having low volumetric expansion under pressure includes a thermoplastic core tube, one or more braided reinforcing layers of high strength aramid yarn having a tensile modulus of elasticity of about 17,000,000 psi and a tenacity of more than 20 grams per denier at room temperature, and an outer cover of elastomeric material.
Inventors
- 👤 Donald E. Washkewicz
- 👤 Harold Belofsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/06; E; E21; E21B; E21B34/00; E21B34/16; F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085; F16L11/086; F16L11/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A high burst strength flexible composite hose, comprising a flexible thermoplastic core tube, one or more layers of fibrous reinforcing material disposed in braided yarns about said core tube, said fibrous reinforcing material having a tensile modulus of at least 17,000,000 pounds per square inch, a tenacity of at least 20 grams per denier at room temperature and an elongation at break of about 2.5 percent, said yarns having a producers twist of about 0.5 turns per inch and less than two turns per inch and no other pre-twist, and a flexible cover of thermoplastic material sheathing said one or more layers of reinforcing material.
Claim 2
Dependent Claim
105 words
A high burst strength flexible composite hose, comprising a flexible thermoplastic core tube, one or more layers of fibrous reinforcing material disposed in braided yarns about said core tube, said fibrous reinforcing material having a tensile modulus of at least 17,000,000 pounds per square inch, a tenacity of at least 20 grams per denier at room temperature and an elongation at break of about 2.5 percent, said yarns having a producers twist of about 0.5 turns per inch and less than two turns per inch and no other pre-twist, and a flexible cover of thermoplastic material sheathing said one or more layers of reinforcing material.
Claim 3
Dependent Claim
30 words
The hose as set forth in claim 1, wherein said fibrous reinforcing material is Kevlar, an aramid filament having a tenacity greater than 20 grams per denier at room temperature.
Claim 4
Dependent Claim
33 words
The hose as set forth in claim 1, wherein said one or more layers of fibrous reinforcing material are applied around said core tube to give a coverage of less than 100 percent.
References Cited (Backward Citations)
US4048362A
Cited
US4142554A
Cited
US4343333A
Cited
US4336415A
Cited
US4463652A
Cited
US4384595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |