Underground utility equipment vault

  • US 4,709,120 A
  • Filed: 06/06/1986
  • Issued: 11/24/1987
  • Est. Priority Date: 06/06/1986
  • Status: Expired due to Fees
First Claim
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1. An improved underground utility equipment vault comprising:

  • (a) an inner chamber constructed from a non-electrically conductive material of a selected geometric configuration;

    (b) an outer chamber constructed from electrically conductive heat exchange material in a selected geometric figuration larger in overall dimension than said inner chamber;

    (c) supporting means for supporting said inner chamber within said outer chamber in spaced relationship to said outer chamber;

    (d) heat vent and cold air return means provided in said inner chamber for passive convection cooling communication between the interior of said inner chamber and the space the exterior of the inner chamber and the interior of the outer chamber;

    (e) the exterior of said outer chamber coated with a protective dielectric coating and being further provided with cathodic protection in the form of a plurality of sacrificial anodes;

    (f) said inner chamber containing electrical equipment electrically coupled to cables extending through the inner and outer chambers in electrically isolated relationship relative to said outer chamber.

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