Abstract: An injection molding apparatus comprising two spaced, parallel lower guide rods mounted to an undercarriage. A ram carriage and a barrel carriage are slidingly mounted on the lower guide rods. A feedscrew ram extends from the ram carriage into a tunnel formed in the barrel carriage to inject plastic out of a nozzle attached to the end of the barrel farthest from the ram carriage, and into a mold. Two spaced, parallel upper guide rods extend from the barrel carriage to slidingly engage the ram carriage. A pair of hydraulic cylinders displace the ram carriage with respect to the barrel carriage. A third hydraulic cylinder displaces the barrel carriage with respect to the undercarriage. The undercarriage, pivotally mounted to a base, is pivoted by a screw jack which displaces the undercarriage about an arcuate path.

Abstract: The invention concerns an earth ripping attachment which can be mounted on the bucket of a dragline and used to break through cap rock, frozen earth, or other difficult to dig overburden. The device has a base adapted to fit against the underside of the bucket. An upwardly folded lip at one end of the base receives and engages the digging edge of the bucket, while means provided at the other end connects to the bucket hoist rigging to secure the attachment in place. One or more ripper teeth are spaced below the base and point in the drag direction. With this attachment the full drag force of the dragline and the weight of the bucket are utilized in the ripping operation.

Abstract: A method of making a chain generally consisting of forming at least two links integrally so that the two links are interlocked and are joined together and then severing the links along the joint to provide at least two separate, interlocked links.