Fire resistant hose construction

• US 20060151043A1
• Filed: 02/28/2005
• Published: 07/13/2006
• Est. Priority Date: 01/07/2005
• Status: Abandoned Application

• Current Assignee: Parker-Hannifin Corporation
• Original Assignee: Parker-Hannifin Corporation
• Inventors: Nanney, Shadrach, Stroempl, Peter J.
• Application Number:
  US11/068,319
• Publication Number:
  US 20060151043A1
• Time in Patent Office: Days
• US Class Current: 138/125
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 2262/103 Metal fibres
• CPC Class Codes: B32B 2274/00 Thermoplastic elastomer material
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 25/10 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 25/20 comprising silicone rubber
• CPC Class Codes: B32B 2597/00 Tubular articles, e.g. hoses, pipes
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 3/04 characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: F16L 11/081 comprising one or more layers of a helically wound cord or wire in combination with braided layers F16L11/088
• CPC Class Codes: F16L 11/085 comprising one or more braided layers in combination with layers of a helically wound core or wire F16L11/088
• CPC Class Codes: F16L 11/125 non-inflammable or heat-resistant hoses
• CPC Class Codes: F16L 57/04 : against fire or other external sources of extreme heat
• CPC Class Codes: F16L 59/145 : providing fire-resistance in general F16L57/04
• CPC Class Codes: F16L 59/153 : for flexible pipes

Abstract

Fire-resistant flexible hose construction particularly adapted for aerospace applications as such construction may exhibit a flame class rating of “Class A” at 0 gallons per minute (0 liters per minute) flow and 1500 psig (10.3 MPa) pressure under SAE Standard AS1055, “Fire Testing of Flexible Hose, Tube Assemblies, Coils, Fittings and Similar System Components.” The construction includes a tubular core, a thermal insulation layer surrounding the core, one or more reinforcement layers surrounding the thermal insulation layer, and a firesleeve layer surrounding the one or more reinforcement layers. The thermal insulation layer may be formed of a thermoplastic resin such as a polyimide having a melting temperature of at least about 300° C., and each of the reinforcement layers may be braided or otherwise formed of a metal wire.

Claims

1. A fire-resistant flexible hose comprising:

a tubular core having an exterior surface;

a thermal insulation layer surrounding the exterior surface of the core, the thermal insulation layer comprising a thermoplastic resin having a melting temperature of at least about 300°

C.;

one or more reinforcement layers surrounding the thermal insulation layer, each of the one or more reinforcement layers comprising, independently, one or more filaments of one or more fibers; and

a firesleeve layer surrounding the one or more reinforcement layers.

2. The hose of claim 1 wherein the firesleeve layer comprises an ablative polymeric material.

3. The hose of claim 2 wherein the ablative polymeric material of the layer firesleeve is selected from the group consisting of cross-linked silicone resins and copolymers, and combinations thereof.

4. The hose of claim 1 wherein the core comprises a polymeric material selected from the group consisting of fluoropolymer resins and copolymers, and combinations thereof.

5. The hose of claim 1 wherein the thermoplastic resin of the thermal insulation layer is selected from the group consisting of polyimide resins and copolymers, and combinations thereof.

6. The hose of claim 1 wherein the thermal insulation layer has a thickness of between about 5-10 mils (0.127-0.254 mm).

7. The hose of claim 1 wherein the thermal insulation layer is in the form of a film wrapped around the exterior surface of the core.

8. The hose of claim 1 which exhibits a flame class rating of “

Class A”

at 0 gallons per minute (0 liters per minute) flow and 1500 psig (10.3 MPa) pressure under SAE Standard AS1055, “

Fire Testing of Flexible Hose, Tube Assemblies, Coils, Fittings and Similar System Components.”

9. The hose of claim 1 wherein the one or more reinforcement layers each is braided, wound, woven, or knitted, independently, of the one or more filaments of one or more fibers.

10. The hose of claim 1 wherein the one or more fibers comprises one or more wires, each of the wires comprising, independently, a material selected from the group consisting of metals and metal alloys, and combinations thereof.