Patent ID: 7350827
Filing Date: 2008-04-01
Classification: E03F,F16L,Y10T

Abstract:
1. An expansion ring assembly, comprising: a ring having first and second adjacent end portions; a first cam member disposed interiorly within said ring, said first cam member rotatably coupled to said first ring end portion, said first cam member having a cam surface engageable with at least a portion of said second ring end portion upon rotation of said first cam member to drive said first and second ring end portions apart from one another and thereby radially expand said ring, wherein said first cam member further includes a tool-receiving structure, said tool receiving structure coincident with an axis of rotation of said first cam member, in combination with: a wall having a substantially circular opening; and a resilient, substantially annular gasket fitted within said opening, said expansion ring assembly disposed within said gasket such that rotation of said first cam member in a first direction drives said first and second ring end portions apart from one another to thereby radially expand said ring and radially compress said gasket against said opening.