摘要 |
<p>A helically fabricated flexible hose having at least two parallel helical support members (10, 11; 30, 31 and 32), inner and outer plastics strips (11; 30: 20; 44) wrapped helically about the support members, and at least one pair of helical electrical conductors (16, 17, 18, 19; 38, 39, 40, 41, 42, 43) disposed on opposite sides of one of the support members and slidably positioned between the inner and outer plastics strips. Each of the helical electrical conductors comprises a conductive element and a plastics dielectric coating disposed around the conductive element. The plastics dielectric coatings are not bonded to the inner and outer plastics strips so that they may slide between them.</p> |