Abstract: In one embodiment of a trailer and/or unloading device, a front and rear roller assembly and chock may be moved along the length of the trailer. The front and rear roller assemblies may each include two rollers that may be actuated between a first and second position. The chock may include a stop that may be actuated between a first and second position. The arrangement of front and rear rollers and chock allows the operator to unload a plurality of objects placed on the trailer deck, one object at a time, while remaining in the cab of a prime mover. The moving components of the trailer and/or unloading device may be powered hydraulically. The trailer and/or unloading device may include strategically placed cameras and a control panel for operating the various elements of the trailer and unloading device placed in the cab of the prime mover.

Abstract: An automated system for handling concrete pipe and for handling and cleaning the components used in the manufacture of the pipe. Once concrete pipe has cured, the system automatically removes the bell and spigot forming rings from the pipe, and cleans and oils them for reuse. At the ring removal station, the pipe is properly positioned and oriented and the rings are pulled from each end of the pipe and transported to cleaning and oiling stations where all critical surfaces of the rings are cleaned by pulverizing, chiseling and brushing the concrete residue from the rings which are then coated with oil. The automated system is designed to handle rings of different sizes without any intervention by an operator, and the system will handle rings of different diameters that are intermixed.

Abstract: A machine for making concrete pipe in which multiple-form sets can be coupled into one module so as to increase production output of the machine without an increase in machine manpower. The multiple-form modules are provided with adapters that make them compatible with conventional single-mode form sets and all cycles of production so that multiple-form modules can be used simultaneously with single-mode form sets. The multiple-form sets also utilize core vibration throughout the fill cycle, but unlike conventional core vibration systems, the amplitude and direction of vibration are continuously varied to distribute the vibration uniformly throughout the length of the pipe being formed.

Abstract: Apparatus for making lined concrete pipe in a reduced time, and provision of such pipe with reduced tendencies to rusting and liner separation, are achieved by a cartridge assembly movable to and away from the pipe machine, a work stand assembly for positioning the cartridge to receive a liner, liner tensioning structures and liner to cartridge clamps for moving the liner to the cartridge, tightening the liner, and holding the liner during transport by the cartridge, and tension bars controlling wire tension during pipe formation. Concurrently with operation of the standard pipe machine, the work stand operates to place a liner on the cartridge. During the stripping cycle of the pipe machine, the cartridge delivers the liner to the core. During the pipe machine vibration under pressure cycle, the tension on the liner tension wires is relieved.

Abstract: Manufacturing lined concrete pipe in a reduced time, and provision of such pipe with reduced tendencies to rusting and liner separation, are achieved by a cartridge assembly (22) movable to and away from the pipe machine, a work stand assembly (23) for positioning the cartridge to receive a liner, liner tensioning structures (68) and liner to cartridge clamps (87) for moving the liner to the cartridge, tightening the liner, and holding the liner during transport by the cartridge, and tension bars (96) controlling wire tension during pipe formation. Concurrently with operation of the standard pipe machine, the work stand operates to place a liner on the cartridge. During the stripping cycle of the pipe machine, the cartridge delivers the liner to the core. During the pipe machine vibration under pressure cycle, the tension on the liner tension wires is relieved.

Abstract: A spacer element is provided for attachment to a pair of parallel wires of a mesh spaced from a surface of a concrete form or wall and having a projection adapted to maintain the spacing between the wall and the plane of the mesh, the element being of generally hairpin shape and providing a duplicate pair of hooks for hooking over one wire, a duplicate pair of second, S-shaped hooks for hooking over a parallel wire, a duplicate pair of V-shaped projections, and a bight joining the S-shaped hooks and providing a looped lever arm for receiving a tool for forcibly applying the element to the mesh.