Nova Patents
EP0803877A2

Arrangement in a cable

Abstract

The present invention relates to an arrangement in a cable, especially a hydro electric control cable, comprising in combination a plurality of hydraulic tubes and electrical cables, and in order to arrive at such an arrangement which allows for a required volume of service fluid while retaining an optimum minimum bending radius, the present invention suggests that the cable is designed as an umbilical (1, 101) with three centrally arranged tubes (2) in helical configuration to allow for lower minimum bend radius (MBR).

EP0803877A2, drawing sheet 1
Sheet 1 of 9

Term

Term ended

Projected expiry passed 21 April 2017, 9.4 years ago.

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6 claims: 4 independent, 2 dependent

  1. 1
    Arrangement in a cable, especially a hydro electric control cable, comprising in combination a plurality of hydraulic tubes and electrical cables, characterized in that the cable is designed as an umbilical (1, 101, 201) with three centrally arranged tubes (2) in helical configuration to allow for lower minimum bend radius (MBR).
  2. 4
    Arrangement as claimed in any of the preceding claims 1-3, characterized in that the three inner central tubes (2) are surrounded by a ring of electric cables (8) and hydraulic tubes (9), preferably of smaller diameter than said inner central tubes (2).
  3. 5
    Arrangement as claimed in any of the preceding claims 1-4, characterized in that the three inner central tubes (2) are surrounded by a ring of electric cables (8) and hydraulic tubes (9), wherein the outer diameter of each of said electric cables (8) is larger than the outer diameter of each of said hydraulic tubes (9), and wherein are arranged fillers (10) supporting individually said electric cables (8) and said hydraulic tubes (9) as well as an outer sheath or an intermediate sheath (11).
  4. 6
    Arrangement as claimed in any of the preceding claims, characterized in that for application as a dynamic umbilical, said three central tubes (2) and outer ring of electrical cables (8) and hydraulic tubes (9) are provided with a number of outer helically wound layers of metal tape (112;212) to achieve required weight/diameter ratio, for example applied directly to a static length (Fig. 2 and Fig. 3) for the desired dynamic length, and possibly being provided with an outer sheath of extruded PU (113;213).
Independent claims4