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Assembly for an electrical cable providing strain relief and a water-tight seal

  • US 4,789,759 A
  • Filed: 11/23/1987
  • Issued: 12/06/1988
  • Est. Priority Date: 03/25/1986
  • Status: Expired due to Fees
First Claim
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1. An assembly for establishing a sealed interconnection for an insulated electrical cable, the assembly comprising:

  • a bulkhead, having a through-hole extending from an outside to an inside surface and having three concentric bores, a first bore being internally threaded and extending from the outside surface into the bulkhead, a second bore spaced apart from the first bore by a camming surface, and a third bore in transition with the second bore by means of a shoulder, the third bore extending to the inside surface;

    a nut portion having an axial bore extending therethrough, said bore having a diameter greater than the diameter of said insulated cable, and an externally threaded portion matable with said internal threads on said first bore; and

    a ferrule of cylindrical shape having a band portion and a plurality of radially disposed tines extending from said band portion in an axial direction, said ferrule being slidably receivable over said insulated cable;

    wherebywhen said cable is prepared by removing a portion of the insulation therefrom exposing a length of the conductor, the nut portion and the ferrule are slid over the prepared end of the cable, and the cable inserted into the through-hole until the insulation abuts the shoulder and the conductor extends through the third bore, bringing the threads of said nut into registry with the threads of the first bore and screwing the nut forward into the through-hole causes the tines of said ferrule to contact the camming surface and forces the tines radially inward and into the insulation of the cable, and drives the insulation axially forward against the shoulder, thereby establishing a sealed interconnection.

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