An expansion ring assembly for sealing a gasket with respect to an annular wall of a rigid structure. The expansion ring assembly includes a drive mechanism for engaging and driving apart the opposing ends of an expansion ring to thereby radially expand the ring. The drive mechanism generally inclu
An expansion ring assembly for sealing a gasket with respect to an annular wall of a rigid structure. The expansion ring assembly includes a drive mechanism for engaging and driving apart the opposing ends of an expansion ring to thereby radially expand the ring. The drive mechanism generally includes a pair of block members, formed of steel or a rigid plastic, for example, having oppositely threaded bores therethrough, and a bolt having oppositely threaded ends which are threaded within respective threaded bores of the block members. The block members are interlockingly engaged with respective opposite ends of the expansion ring. Rotation of the bolt in a first direction simultaneously drives the block members apart from one another along the bolt to radially expand the expansion ring, and rotation of the bolt in a an opposite, second direction simultaneously drives the block members toward one another along the bolt to allow the expansion ring to radially contract.
대표청구항▼
What is claimed is: 1. An expansion ring assembly, comprising: a ring including a pair of end portions; and a drive mechanism, comprising: a pair of plastic block members each having a threaded insert therein, said inserts of said block members being oppositely threaded, said block members connecte
What is claimed is: 1. An expansion ring assembly, comprising: a ring including a pair of end portions; and a drive mechanism, comprising: a pair of plastic block members each having a threaded insert therein, said inserts of said block members being oppositely threaded, said block members connected to respective end portions of said ring; and a bolt including oppositely-threaded ends respectively threaded within said inserts of said block members, wherein rotation of said bolt in a first direction causes said block members to be simultaneously driven apart from one another to thereby expand said ring. 2. The expansion ring assembly of claim 1, wherein said drive mechanism is disposed substantially within said ring, and said block members are removably connected to respective end portions of said ring. 3. The expansion ring assembly of claim 1, wherein each insert is insert molded within its respective block member. 4. The expansion ring assembly of claim 3, wherein each insert is made of metal and has a generally cylindrical shape. 5. The expansion ring assembly of claim 4, wherein each insert includes at least one anchoring ridge projecting outwardly therefrom. 6. The expansion ring assembly of claim 1, wherein said ring includes a longitudinal axis, said bolt disposed perpendicular to said longitudinal axis. 7. The expansion ring assembly of claim 1, wherein said end portions of said ring define an opening in said ring therebetween, said opening spanned by said drive mechanism. 8. The expansion ring assembly of claim 1, further comprising an oversleeve engaging and overlapping said end portions of said ring, whereby said oversleeve prevents lateral movement of said end portions with respect to one another. 9. The expansion ring assembly of claim 1, wherein said ring is formed of a plurality of segments, each connection between adjacent segments provided by a said drive mechanism. 10. The expansion ring assembly of claim 1, wherein said end portions of said ring include first interlocking structure and said block members include second interlocking structure, said first interlocking structures of said ring end portions removably engaged with respective said second interlocking structures of said block members. 11. The expansion ring assembly of claim 10, wherein said first interlocking structure of said ring end portions comprises a notch defining a pair of first projections and said second interlocking structure of said block members comprises a second projection disposed between a pair of undercut portions, said second projection received within said notch and said first projections received within said undercut portions. 12. An expansion ring assembly, comprising: a ring including a pair of end portions, each end portion including first interlocking structure; and a drive mechanism, comprising: a pair of block members each having second interlocking structure and a threaded bore therein, said bores of said block members being oppositely threaded, said first interlocking structures of said ring end portions removably engaged with respective said second interlocking structures of said block members; a bolt including oppositely-threaded ends respectively threaded within said bores of said block members, wherein rotation of said bolt in a first direction causes said block members to be simultaneously driven apart from one another to thereby expand said ring; and said first interlocking structure of said ring end portions comprises a notch defining a pair of first projections and said second interlocking structure of said block members comprises a second projection disposed between a pair of undercut portions, said second projection received within said notch and said first projections received within said undercut portions. 13. An expansion ring assembly, comprising: a ring including a pair of end portions, each end portion including first interlocking structure; and a drive mechanism, comprising: a pair of block members each having second interlocking structure and a threaded bore therein, said bores of said block members being oppositely threaded, said first interlocking structures of said ring end portions removably engaged with respective said second interlocking structures of said block members; and a bolt including oppositely-threaded ends respectively threaded within said bores of said block members, wherein rotation of said bolt in a first direction causes said block members to be simultaneously driven apart from one another to thereby expand said ring, wherein each said block member is formed of a rigid plastic including a threaded insert therein, said inserts of said block members being oppositely threaded. 14. An expansion ring assembly, comprising: a ring including a pair of end portions; and a drive mechanism including a pair of block members each having a threaded bore therethrough, said bores of said block members being oppositely threaded, said block members connected to respective end portions of said ring, and a bolt including oppositely-threaded ends respectively threaded within said bores of said block members; an oversleeve member disposed externally of said ring and overlapping said end portions of said ring; and a tape strip adhesively secured over said oversleeve member and at least one of said end portions of said ring; wherein rotation of said bolt in a first direction causes said block members to be driven away from one another to thereby drive said end portions of said ring away from one another and break said tape strip. 15. The expansion ring assembly of claim 14, wherein said drive mechanism is disposed substantially within said ring, and said block members are removably connected to respective end portions of said ring. 16. The expansion ring assembly of claim 14, wherein each said block member is formed of a rigid plastic including a threaded insert therein, said inserts of said block members being oppositely threaded. 17. The expansion ring assembly of claim 14, wherein adjacent said end portions of said ring segments define a gap therebetween, each said gap spanned by a said drive mechanism. 18. The expansion ring assembly of claim 14, wherein said end portions of said ring include first interlocking structure and said block members include second interlocking structure, said first interlocking structures of said ring end portions removably engaged with respective said second interlocking structures of said block members. 19. The expansion ring assembly of claim 18, wherein said first interlocking structure of said ring end portions comprises a notch defining a pair of first projections and said second interlocking structure of said block members comprises a second projection disposed between a pair of undercut portions, said second projection received within said notch and said first projections received within said undercut portions. 20. An expansion ring assembly, comprising: a ring including a pair of end portions; and a drive mechanism, comprising: a pair of block members each having a threaded bore therein, said bores of said block members being oppositely threaded, said end portions of said ring removably engaged with respective said block members; and a bolt including oppositely-threaded ends respectively threaded within said bores of said block members, said bolt comprising the sole connection between said block members other than said ring, wherein rotation of said bolt in a first direction causes said block members to be simultaneously driven apart from one another to thereby expand said ring. 21. The expansion ring assembly of claim 20, further comprising an oversleeve having a substantially U-shaped cross section, said oversleeve overlapping said end portions of said ring. 22. The expansion ring assembly of claim 20, wherein said ring includes a planar web portion having an outer surface and pair of side walls depending interiorly therefrom, said web portion and said side walls defining a substantially U-shaped cross section. 23. The expansion ring assembly of claim 20, wherein said bolt includes tool engagement structure disposed in between said block members. 24. An expansion ring assembly, comprising: a ring including a pair of end portions, each end portion including first interlocking structure; and a drive mechanism, comprising: a pair of block members each having second interlocking structure and a threaded bore therein, said bores of said block members being oppositely threaded, said first interlocking structures of said ring end portions removably engaged with respective said second interlocking structures of said block members; and a bolt including oppositely-threaded ends respectively threaded within said bores of said block members, wherein rotation of said bolt in a first direction causes said block members to be simultaneously driven apart from one another to thereby expand said ring, wherein said bolt comprises the sole connection between said block members other than said ring. 25. The expansion ring assembly of claim 24, wherein said drive mechanism is disposed substantially within said ring. 26. The expansion ring assembly of claim 24, further comprising an oversleeve having a substantially U-shaped cross section, said oversleeve overlapping said end portions of said ring. 27. The expansion ring assembly of claim 24, wherein said ring includes a planar web portion having an outer surface and pair of side walls depending interiorly therefrom, said web portion and said side walls defining a substantially U-shaped cross section. 28. The expansion ring assembly of claim 24, wherein said bolt includes tool engagement structure disposed in between said block members.
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