Cable Strain Relief and Pressure Seal
Original Publication Date: 1978-May-01
Included in the Prior Art Database: 2005-Feb-21
A pressure seal allowing flat multistrand cables 1 to pass through a wall 2 of a sealed enclosure employs a moulded rubber plug 3, a tapered hole 4 in the wall, having retaining lips 5 to prevent extrusion, and a clamping plate 6. In the exploded drawing, the plug 3 is shown partly cut away and has two side splits 7 through which the cables 1 are assembled to reach locating grooves 12. The exterior of the plug is formed with circumferential ribs 8. Compression of the plug by plate 6 causes the splits 7 and grooves 12 to close around the cables and the ribs 8 to seal against the surface of hole 4. By bending sections 10 of the cables to lie in channels 11 of the plug, the clamping plate is also used to provide strain relief.