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| Number | Title | Issue Date |
| 8118519 | Grout and lifting tube A grout and lifting tube for casting within a concrete segment. The tube provides enhanced sealing between the tube and the concrete to prevent moisture leakage into a structure formed by a plurality of the concrete segments. The tube includes a generally cylindrica... | 02/21/2012 |
| 7827665 | Gasket and mandrel assembly for pipe joints A gasket and mandrel assembly, including a gasket having an annular main body portion with an anchor flange and a pipe sealing portion. The gasket is foldable between a folded position in which the pipe sealing portion is disposed substantially within the main body ... | 11/09/2010 |
| 7677603 | Seal assembly for pipe-to-structure connections A seal assembly for effecting a fluid tight seal between a pipe and an opening in the wall of a structure, particularly a relatively thin-walled structure made of a rigid plastic, fiberglass, or of metal, for example. The seal assembly generally includes a seal ring... | 03/16/2010 |
| 7350827 | Cam expansion ring assembly An expansion ring assembly and method for sealingly installing a gasket within an opening in a wall of a structure. The expansion ring assembly includes an expansion ring having first and second adjacent end portions, and first and second cam members are rotatably c... | 04/01/2008 |
| 7263746 | Expansion ring assembly with removable drive mechanism An expansion ring assembly for sealing a gasket within an opening in the wall of a structure, the assembly including a drive mechanism having a pair of block members each having a threaded bore, and a bolt having oppositely threaded ends respectively threaded within... | 09/04/2007 |
| 7252293 | Two-part gasket for pipe-to-pipe connections A gasket for pipe-to-pipe connections, which is closely received within a rectangular-shaped annular groove in the bell end of a pipe, and provides a compressive, fluid-tight seal with the spigot end of another pipe. The gasket includes a two-part body having a subs... | 08/07/2007 |
| 7146689 | Expansion ring assembly 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. Th... | 12/12/2006 |
| 7028972 | Gasket and mandrel assembly for pipe joints A gasket and mandrel assembly, including a gasket having an annular main body portion with an anchor flange and a pipe sealing portion. The gasket is foldable between a folded position in which the pipe sealing portion is disposed substantially within the main body ... | 04/18/2006 |
| 6805359 | Expansion ring assembly 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. Th... | 10/19/2004 |
