US3828112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite hose for conductive fluid
Assignee: FLUROCARBON COMPANY
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Filing: 1973-03-14
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Granted: 1974-08-06
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Expires: 1993-03-14
Abstract
Abstract A composite hose particularly advantageous for use in conveying an electrical conductive paint in an electrostatic paint spray system has a synthetic resinous core tube such as nylon which is resistant to chemical attack by the paint, a contiguous substantially non-porous layer of synthetic resin which insulates the core tube against leakage of static charge therefrom, an extrusion or tape of semi-conductive synthetic resin containing particles of an electrical conductor dispersed uniformly therein lying in intimate contact about the insulating layer, a braided electrical conductor wound in electrical contact about the semiconductive layer and an abrasion resistant sheath about the braid.
Inventors
- 👤 H Johansen
- 👤 D Whittaker
- 👤 L Phillippi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:20
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/127
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A composite hose for conveying electro-conductive fluids comprising a substantially non-porous, synthetic resinous core tube and including an electrical insulating layer, said core tube and said layer preventing leakage of a static charge on said fluids therethrough, a semi-conductive synthetic resinous layer having an electrical resistance of not more than about 500 ohmcentimeters disposed in intimate contact over the said layer, an electrical conductive braid over and contiguous with the semiconductive layer, and an abrasion resistant sheath over the braid.
Claim 2
Dependent Claim
80 words
A composite hose for conveying electro-conductive fluids comprising a substantially non-porous, synthetic resinous core tube and including an electrical insulating layer, said core tube and said layer preventing leakage of a static charge on said fluids therethrough, a semi-conductive synthetic resinous layer having an electrical resistance of not more than about 500 ohmcentimeters disposed in intimate contact over the said layer, an electrical conductive braid over and contiguous with the semiconductive layer, and an abrasion resistant sheath over the braid.
Claim 3
Dependent Claim
34 words
The hose of claim 1 wherein the core tube is nylon, the insulating layer is polyethylene, the semi-conducting layer is an ethylene-vinyl acetate copolymer, the braid is stainless steel and the sheath is polyurethane.
Claim 4
Dependent Claim
11 words
The hose of claim 1 wherein the core tube is nylon.
Claim 5
Dependent Claim
10 words
The hose of claim 1 wherein the sheath is polyurethane.
Claim 6
Dependent Claim
15 words
The hose of claim 1 wherein the semi-conductive resinous layer has carbon black dispersed therein.
Claim 7
Dependent Claim
20 words
The hose of claim 5 wherein the semi-conductive layer has a resistance of from about 10 to about 100 ohm-centimeters.
Claim 8
Dependent Claim
16 words
The hose of claim 1 wherein the core tube and the insulating layer are different resins.
Claim 9
Dependent Claim
14 words
The hose of claim 1 wherein the core tube is also the insulating layer.
Claim 10
Dependent Claim
25 words
The hose of claim 1 wherein the said substantially non-porous insulating layer has a dielectric strength of at least about 300 volts per mil thickness.
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |