IP Library Granted Patent US 7,306,013
Granted Patent B2
US 7,306,013 · App. 11/216,109 · Granted Dec 11, 2007

Fuel hose

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Quick Facts
Patent No.
US 7,306,013
App. No.
11/216,109
Granted
Dec 11, 2007
Kind
B2
Abstract

A fuel hose which is excellent in antistatic property, sour gasoline resistance, a sealing property and the like. The fuel hose includes a polyamide resin inner layer 1 and an electrically conductive coating layer 2 which is formed by the following essential components (A) to (C): (A) fluororubber; (B) an electrically conductive agent; and (C) a crosslinking agent including (a) polyhydroxy aromatic compound and a quaternary ammonium salt or (b) an amine crosslinking agent, the electrically conductive coating layer being provided on the inner peripheral surface of the polyamide resin inner layer over the entire length thereof.

Claims (16)

1. A fuel hose comprising a polyamide resin inner layer and an electrically conductive coating layer which is formed by the following essential components (A) to (C):

(A) fluororubber;

(B) an electrically conductive agent; and

(C) a crosslinking agent comprising (a) polyhydroxy aromatic compound and a quaternary ammonium salt or (b) an amine crosslinking agent,

the electrically conductive coating layer being provided directly on the inner peripheral surface of the polyamide resin inner layer over the entire length thereof.

2. A fuel hose as set forth in claim 1 , wherein the electrically conductive coating layer has a thickness of 3 to 20 μm.

3. A fuel hose as set forth in claim 1 , wherein the electrically conductive coating layer has an electrical resistance of 1.0×10 8 Ω·cm or less.

4. A fuel hose as set forth in claim 2 , wherein the electrically conductive coating layer has an electrical resistance of 1.0×10 8 Ω·cm or less.

5. A fuel hose comprising a polyamide resin inner layer and an electrically conductive coating layer which is formed by the following essential components (A) to (C):

(A) fluororubber;

(B) an electrically conductive agent; and

(C) a crosslinking agent comprising (a) polyhydroxy aromatic compound and a quaternary ammonium salt or (b) or amine crosslinking agent,

the electrically conductive coating layer being provided on the inner peripheral surface of the polyamide resin inner layer over the entire length thereof, the fuel hose further comprising a coating layer formed by the essential components (A) and (C), the coating layer being provided on an outer peripheral surface of the fuel hose.

6. A fuel hose as set forth in claim 5 , wherein the electrically conductive coating layer has a thickness of 3 to 20 μm.

7. A fuel hose as set forth in claim 5 , wherein the electrically conductive coating layer has an electrical resistance of 1.0×10 8 Ω·cm or less.

8. A fuel hose as set forth in claim 6 , wherein the electrically conductive coating layer has an electrical resistance of 1.0×10 8 Ω·cm or less.

Assignments (2)
CHANGE OF NAME Recorded Oct 20, 2014
From: TOKAI RUBBER INDUSTRIES, LTD.
To: SUMITOMO RIKO COMPANY LIMITED
Reel/Frame 034016/0613 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 1, 2005
From: IIO, SHINJI; KATAYAMA, KAZUTAKA
To: TOKAI RUBBER INDUSTRIES, LTD.
Reel/Frame 016948/0280 →