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| Number | Title | Issue Date |
| 7677829 | Inserts and reusable holder therefor Method and apparatus for providing inserts, such as lift inserts and step inserts, in cast members. The inserts have breakaway tabs mounted in receiving slots in either a reusable holder or disk-shaped member. The assembled insert and holder are inserted through a c... | 03/16/2010 |
| 7108101 | Manhole insert for manufacture of a cast member and to provide a step insert having increased structural and holding strength Method and apparatus for forming cast members. Steps are provided in the cast member by sliding mounting flanges of hollow plastic step inserts into slots provided in the inner mold shell. The cast material is then poured into the mold. Once the cast material has se... | 09/19/2006 |
| 6921085 | Packaging design incorporating gasket clamping assemblies and installation instructions A package comprising gasket mounting clamps and instructions for mounting same. The mounting clamps include an expansion clamp and a takedown clamp. The expansion clamp engages an interior of a gasket inserted. The takedown clamp is looped in the gasket. The takedow... | 07/26/2005 |
| 6651949 | Apparatus for casting a gasket and associated positioning member into an opening and a cast member for receiving a conduit Method and apparatus for casting a gasket into a cast member utilizing a one-piece mandrel assembly provided within a mold assembly. The resilient, compressible gasket is mounted upon the mandrel assembly during the casting operation. The mandrel assembly... | 11/25/2003 |
| 6607219 | Expansion type clamping band characterized by simplified design and ease of use An annular-shaped, expansion type clamping band has laterally overlapping ends, each having a skewed surface, the skewed surfaces slidably engaging one another. The ends are further provided with elongated guide slots for receiving a threaded bolt. A thre... | 08/19/2003 |
| 6568691 | Method and apparatus for forming cast members having embedded boot type gaskets A molded annular gasket is placed upon a mandrel for embedment of its annular-shaped embedment portion within an opening in a cast member. After the cast member has been cured and removed from a molding assembly, including the mandrel, the pipe attachment... | 05/27/2003 |
| 6406025 | Gasket and method for fabrication and use with corrugated pipe A resilient compressible gasket having an embedment portion, a pipe engaging portion and a intermediate "radius" portion integral with the embedment and pipe engaging portions. The gasket assumes a "pleated" configuration when in the operative position, t... | 06/18/2002 |
| 6196517 | Placement ring assembly having cushioned knockout assembly A placement ring assembly has inside and outside mandrels releasably fastened together to secure and align a pipe connector gasket therebetween. A permanent magnet of a magnet assembly is inserted through co-aligned openings in the mandrels and is magneti... | 03/06/2001 |
| 6126173 | Extruded gasket for cored manholes An extruded gasket being formed of a suitable resilient, compressible material through out the body thereof to facilitate controlling critical gap dimensions measured between the components having the gasket arranged in said gap to provide an excellent wa... | 10/03/2000 |
| 5997006 | Bidirectional gasket having water energizing pockets A bidirectional gasket providing a water-tight seal between a manhole assembly and a pipe, having a T-shaped anchoring portion for embedment in a manhole opening. An A-shaped pipe engagement portion joined to the anchoring portion by a connecting web faci... | 12/07/1999 |
| 5884438 | Lift insert assembly and fabrication assembly method therefore A lift pin insert assembly is releasably mounted upon a mold member for casting a manhole section. The mold is filled with concrete, which surrounds and embeds the insert assembly in the cast member. The insert is configured to receive a lift pin, which i... | 03/23/1999 |
| 5860254 | Lift insert assembly and fabrication assembly method A lift pin insert assembly is releasably mounted upon a mold member for casting a manhole section. The mold is filled with concrete, which surrounds and embeds the insert assembly in the cast member. The insert is configured to receive a lift pin, which i... | 01/19/1999 |
| 5299884 | Water lock method and apparatus A watertight chimney assembly prevents infiltration of water in the region between a manhole cover support frame and a concrete manhole assembly. The watertight chimney, in one embodiment, is comprised of a pair of tubular telescoping sleeves each provide... | 04/05/1994 |
| 5248154 | Bidirectional gasket A gasket for providing a watertight seal between an opening and a cast member and a conduit extending into said cast member, the gasket being an annular member having an outer circumferential portion of inverted T-shaped cross-section for embedment into t... | 09/28/1993 |
| 5217237 | Bidirectional gasket having water energizing pockets A bidirectional gasket providing a water-tight seal between an opening in a manhole assembly and a pipe extending into said opening, comprises a T-shaped anchoring portion for embedment in a manhole opening A substantially A-shaped pipe engagement portion... | 06/08/1993 |
| 5081802 | Method and apparatus for lining manhole assemblies and the like Cast members are provided with a liner assembly to protect the cast material from corrosion. The liner assembly is formed of a plurality of curved liner sections having integral joining flanges. A resilient compressible gasket is arranged between opposing... | 01/21/1992 |
