Electrically insulated cable and arrangement for connecting the cable

• US 6,064,002 A
• Filed: 10/03/1997
• Issued: 05/16/2000
• Est. Priority Date: 10/03/1996
• Status: Expired due to Term

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Ebina, Satoshi, Hayami, Hiroshi, Moriuchi, Kiyoaki
• Primary Examiner(s): Reichard, Dean A.
• Assistant Examiner(s): Mayo, III, William H
• Application Number:
  US08/942,842
• Time in Patent Office: 956 Days
• Field of Search: 174/52.1, 174/63, 525/440, 428/379, 428/383
• US Class Current: 174/564
• CPC Class Codes: G01P 1/026 for speed measuring devices, e.g. pulse generator
• CPC Class Codes: H01B 7/295 using material resistant to flame

Abstract

An electrically insulated cable having a sheath made of a material which is heat-fusible to a polyamide or polyester resin so that a highly waterproof joint portion can be formed between the cable and a housing simultaneously when the housing is injection-molded from a polyamide or polyester resin. The sheath is made from a crosslinked resin composition comprising a thermoplastic polyurethane elastomer and a thermoplastic polyester elastomer mixed together in a weight ratio of 80:20 to 20:80. A housing is provided around one end of the sheath of this cable by injection-molding polyamide or polyester engineering plastics to fuse the sheath to the housing, thereby hermetically sealing the interface between the cable and the housing. The sheath may be made from a crosslinked resin composition comprising a thermoplastic polyurethane elastomer and a thermoplastic polyamide elastomer mixed together in a weight of 80:20 to 10:90. It is possible to seal the cable to a housing made of polyamide engineering plastics.

Claims

1. An electrically insulated cable having single core or multi-core insulated wires, comprising:

at least one conductor element;

an insulating member covering said at least one conductor element; and

a sheath provided around said at least one conductor element covered by said insulating member, said sheath being made from a crosslinked resin composition comprising as a main component a mixture of a thermoplastic polyurethane elastomer and a thermoplastic polyester elastomer mixed together in a weight ratio of 80;

20 to 20;

80, wherein said thermoplastic polyester elastomer is a block copolymer of a crystalline hard segment and a polyether-based amorphous soft segment.

2. An electrically insulated cable as claimed in claim 1, wherein said resin composition is flame-retarded by addition of a flame-retardant other than polybromodiphenyl ether.

3. An electrically insulated cable as claimed in claim 2, wherein said flame-retardant is one selected from a group consisting of ethylene-bis-brominated phthalimide, bis(brominated phenyl) ethane, and bis(brominated phenyl) terephthalamide, or a mixture thereof.

4. An electrically insulated cable as claimed in claim 1, 2 or 3, wherein said cable is connected at one end thereof to a device and to a housing made by injection molding a polyamide resin or a polyester resin sealing said device therein by fusing airtight said housing to said sheath of said cable at said one end.

5. An electrically insulated cable having a sheath, comprising:

at least one conductor element;

an insulating member covering said at least one conductor element; and

a sheath provided around said at least one conductor element covered by said insulating member, said sheath at one end of said cable being sealed by injection molding of a polyamide resin or a polyester resin, said sheath being made from a crosslinked resin composition comprising as a main component a mixture of a thermoplastic polyurethane elastomer and a thermoplastic polyester elastomer mixed together in a weight ratio of 80;

20 to 20;

80, wherein said thermoplastic polyester elastomer is a block copolymer of a crystalline hard segment and a polyether-based amorphous soft segment.

6. An electrically insulated cable as claimed in claim 5, wherein said resin composition is flame-retarded by addition of a flame-retardant other than polybromodiphenyl ether.

7. An electrically insulated cable as claimed in claim 6, wherein said flame-retardant is one selected from a group consisting of ethylene-bis-brominated phthalimide, bis(brominated phenyl) ethane, and bis(brominated phenyl) terephthalamide, or a mixture thereof.

8. An electrically insulated cable as claimed in claim 5, 6 or 7, wherein said cable is connected at one end thereof to a device and to a housing made by injection molding a polyamide resin or a polyester resin sealing said device therein by fusing airtight said housing to said sheath of said cable at said one end.