Patent ID: 8418423
Filing Date: 2013-04-16
Classification: E02D,E04G

Abstract:
1. A plug assembly comprising an insertion member having a cavity which is bounded by a plurality of threads; a hollow expansion member having a cavity in communication with said cavity of said hollow insertion member, and wherein said hollow expansion member is longitudinally aligned with said hollow insertion member; a coupling member which traverses said cavity of said hollow expansion member and which threadably received by said plurality of threads which bound said cavity of said hollow insertion members, thereby coupling said hollow insertion member to said hollow expansion member and filling said cavity of said hollow insertion member and said hollow expansion member thereby preventing any flow of material from said cavity of said hollow expansion member into said cavity of said hollow insertion member preventing any flow of material through said plug assembly, and wherein hollow expansion member is cylindrical and entirely formed from water expandable material and wherein the diameter of said hollow insertion member is smaller than said diameter of said hollow expansion member and wherein said expansion member has a first longitudinal axis of symmetry and wherein said insertion member has a second longitudinal axis of symmetry and wherein said first longitudinal axis of symmetry overlays said second longitudinal axis of symmetry.