Patent US4510974A successfully refreshed from Google Patents.
US4510974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid conveying hose
Assignee: Hitachi Cable Ltd
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Filing: 1982-11-08
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Granted: 1985-04-16
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Expires: 2002-11-08
Abstract
Abstract A plastic hose suitable for conveying refrigerant in a liquid or gas phase, liquefied gas such as LPG, volatile liquids, or gases such as CO 2 , O 2 or N 2 having an impermeable layer or a barrier. The amount of permeation of the gas in the hose to the outside and the amount of permeation of moisture into the hose are limited to extremely small values.
Inventors
- 👤 Takeshi Natori
- 👤 Yoji Kobayashi
- 👤 Shigetaka Watanabe
- 👤 Katsumi Shimizu
- 👤 Ikuei Matsumura
- 👤 Yoshihiro Namekawa
- 👤 Satoshi Miyanaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; B; B60; B60H; B60H1/00; B60H1/00507; B60H1/00557; B60H1/00571; F16L11/12; F16L2011/047
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A fluid conveying hose comprising: an inner layer of plastic; an impermeable layer formed on said inner layer, said impermeable layer being made of a material which is lower in fluid permeability than that of said inner layer, said impermeable layer comprising a plastic film having an overlapping seam and having a surface which is integrally evaporated with a metal film; a first plastic coating layer and a first reinforcing layer of fibers formed on said impermeable layer; and an outermost coating means adapted to resist battery acid and comprising a battery acid resistant material.
Claim 2
Dependent Claim
95 words
A fluid conveying hose comprising: an inner layer of plastic; an impermeable layer formed on said inner layer, said impermeable layer being made of a material which is lower in fluid permeability than that of said inner layer, said impermeable layer comprising a plastic film having an overlapping seam and having a surface which is integrally evaporated with a metal film; a first plastic coating layer and a first reinforcing layer of fibers formed on said impermeable layer; and an outermost coating means adapted to resist battery acid and comprising a battery acid resistant material.
Claim 3
Dependent Claim
17 words
The fluid conveying hose as claimed in claim 1 in which said overlapping seams is spirally formed.
Claim 4
Dependent Claim
28 words
The fluid conveying hose as claimed in claim 1 in which said impermeable layer is bonded to at least one of said inner layer and said outer layer.
Claim 5
Dependent Claim
29 words
The fluid conveying hose as claimed in claim 1 wherein said impermeable layer is made by forming an aluminum film on an adhesive plastic film by using vacuum evaporation.
Claim 6
Dependent Claim
22 words
The fluid conveying hose of claim 1, wherein said inner layer is made of polyamide resin and said evaporated metal comprises aluminum.
Claim 7
Dependent Claim
22 words
The fluid conveying hose of claim 1 wherein said first reinforcing layer of fibers is formed on said first plastic coating layer.
Claim 8
Dependent Claim
56 words
The fluid conveying hose of claim 6 further comprising a second plastic coating layer formed on said first reinforcing layer, a second reinforcing layer of fibers formed on said second plastic coating layer, and a third plastic coating layer formed on said second reinforcing layer, said outermost coating layer being formed on said third plastic layer.
Claim 9
Dependent Claim
22 words
The fluid conveying hose of claim 1 wherein said outermost coating means adapted to resist battery acid is made of fluorinated resin.
Claim 10
Dependent Claim
24 words
The fluid conveying hose of claim 1 wherein said coating layer and said reinforcing layer are thin so that gases can readily pass therethrough.
Claim 11
Dependent Claim
31 words
The fluid conveying hose of claim 1 wherein said coating layer is formed by braiding Nylon-12 fibers, said coating layer being bonded to said impermeable layer and said reinforcing layer simultaneously.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |