Concentric stranded conductor

Details Concentric stranded conductor Concentric stranded conductor

2007-04-26

2008-08-12

Hurley, Shaun R (Department: 3765)

Textiles: spinning, twisting, and twining

Strand structure

Covered or wrapped

C057S237000

Reexamination Certificate

active

07409816

ABSTRACT:
A concentric stranded conductor having a concentric strand having multiple strands. Each strand has multiple single wires. The concentric stranded conductor has a central core strand (5) and a first concentric strand layer (11) having multiple first-layer strands (9) twisted around the central core strand. The twist pitch of the central core strand is from 8 to 70 times the distance between diametrically opposed outer wires of the central core strand, the twist pitch of the first concentric strand layer is from 8 to 30 times the distance between diametrically opposed strands of the first concentric strand layer. |α−(β+γ)| is 15 degrees or less, where α is the twist angle of the central core strand and β and γ are the twist angles of the first-layer strands and first concentric strand layer, and the single wires are made of an aluminum or aluminum alloy to have elongation of 2% or more.

REFERENCES:
patent: 3823542 (1974-07-01), Pemberton
patent: 5449861 (1995-09-01), Fujino et al.
patent: 5711143 (1998-01-01), Munakata et al.
patent: 6260343 (2001-07-01), Pourladian
patent: 6339920 (2002-01-01), Yokoyama
patent: 10-321048 (1998-12-01), None
patent: 11-120839 (1999-04-01), None
patent: 2003-303515 (2003-10-01), None
International Search Report of PCT/JP2005/020158, date of mailing Jan. 10, 2006.
Concise explanation of document JP-A-2003-303515.

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