| US 7,491,885 B2 | ||
| Polymer bushing and cable termination using the same | ||
| Kazuhisa Adachi, Kawasaki (Japan); and Nobuyuki Sema, Kawasaki (Japan) | ||
| Assigned to SWCC Showa Cable Systems Co., Ltd., (Japan) | ||
| Appl. No. 10/572,798 PCT Filed Sep. 16, 2004, PCT No. PCT/JP2004/014002 § 371(c)(1), (2), (4) Date Mar. 22, 2006, PCT Pub. No. WO2005/036708, PCT Pub. Date Apr. 21, 2005. |
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| Claims priority of application No. 2003-350064 (JP), filed on Oct. 08, 2003. | ||
| Prior Publication US 2007/0000680 A1, Jan. 04, 2007 | ||
| Int. Cl. H01R 24/06 (2006.01) | ||
| U.S. Cl. 174—73.1 | 13 Claims |
| 1. A polymer bushing comprising:
a hard insulation sleeve extending along a longitudinal axis from an upper distal end to a lower end and surrounding and molded
integrally with a central conductor bar extending along the longitudinal axis;
a receiving port, for receiving a stress cone of a cable terminal, in the lower end of the hard insulation sleeve;
an electric-field stress-control layer surrounding the insulation sleeve;
a polymer cladding disposed around an outer periphery of the stress-control layer, extending from a lower end thereof to the
upper distal end of the hard insulation sleeve, and having a plurality of longitudinally spaced shades on its outer periphery;
an annular metal fitting concentric with the conductor bar and embedded in and fixed to the hard insulating sleeve, the annular
metal fitting including a flange located at a position longitudinally between the lower end of the polymer cladding and the
receiving port; and
wherein the electric-field stress-control layer is disposed at an interface between the hard insulation sleeve and the polymer
cladding, is in contact with the annular metal fitting and extends longitudinally from the annular metal fitting toward the
upper distal end of the hard insulating sleeve.
|