Abstract: Modular mold equipment for producing concrete culverts with tight tolerances. Modular mold equipment having a coupling plate is used to align and interconnect components of the mold. The components being aligned may have recesses for receiving the coupling plate. Modular mold equipment system with an extended size range to cover all standard concreted duct product sizes. Modular mold equipment having a pallet guide adjustment mechanism adapted for setting the pallet at a desired location in relation to a form. The desired location is based on a wall thickness of a concrete culvert to be produced. Modular mold equipment having a core that includes a core corner and another core component adapted to be coupled to the core corner, and locking apparatus adapted to lock the core corner to the other core component via a mechanism that extends outside the core.

Abstract: An apparatus for extending the wear life of flight bars used in chain-driven scraper conveyor systems by using a replaceable bar end. The bar end is securely attached to the flight bar body by a tongue protruding through an aperture in the bar end and interlocking with the clamp that secures the flight bar to the drive chain, without the use of additional fasteners. The replaceable bar end may be made from a different material than the body of the flight bar. Therefore, a wear resistant material could be used for the bar end, with the bar body and clamp made from conventional, typically more ductile materials. This invention therefore allows for the flight bar end to be replaced as required saving the cost of the main flight bar body and clamp.

Abstract: An apparatus for extending the wear life of flight bars used in chain-driven scraper conveyor systems by using a replaceable bar end. The bar end is securely attached to the flight bar body by a tongue protruding through an aperture in the bar end and interlocking with the clamp that secures the flight bar to the drive chain, without the use of additional fasteners. The replaceable bar end may be made from a different material than the body of the flight bar. Therefore, a wear resistant material could be used for the bar end, with the bar body and clamp made from conventional, typically more ductile materials. This invention therefore allows for the flight bar end to be replaced as required saving the cost of the main flight bar body and clamp.

Abstract: A method for preparing an austempered, work-hardening steel casting. A melt with certain chemical ranges including relatively high carbon and silicon content is poured, heat treated, cooled, austenitized, quenched and austempered, before final cooling to room temperature. This process provides a steel casting with increased wear life, characterized by a duplex microstructure containing ferrite plus carbon in solution in austenite known as ausferrite. The austenite will transform during abrasive service to a hard, wear-resistant martensite on the surface.