Abstract: A foundation structure for supporting a superstructure utilizing a first block and a second block, with a third block disposed between the first and second blocks. Each block includes a top, bottom, and sidewall portion, as well as an interlocking mechanism. At least one chase extends through each of the blocks. The chases are alignable with one another to permit use of an elongated member such as a rod or wire rope which passes through all of the blocks when they are placed in side-by-side orientation. The elongated members are tensioned, causing compression of the blocks into a foundation unit with a contiguous top surface. A superstructure is supported to the top surface of the foundation unit.

Abstract: An improved pipe cleaning tool employing a cutting head and propulsor utilizes a plurality of roller cutters on the cutting head. The rolling cutters are coupled in a pairwise fashion to a rotatable car. The rotatable car in turn is pivoted to the cutting head. Each of the cars and, hence, the radial disposition of each of the roller cutters, is resiliently urged by a spring bias into a preferred radial disposition relative to the longitudinal axis of the cutting head. Moving the pipe cleaning tool through a curve or past other internal obstruction within the pipe is facilitated by rotation of the roller cutter cars and their corresponding roller cutters. In one embodiment, the propulsor disks in the propulsor unit are comprised of a plurality of rigid metal segments pivoted to the propulsor body.

Abstract: The following specification discloses an apparatus and method for providing lifting motion on a substantially symmetrical and compact basis for a pump through a linkage, comprising two members pivotally coupled for relative movement driven by a gear reducer. The first member is driven in a rotational manner with the second member connected thereto being rotationally driven at the same angular velocity, but in the reverse direction thereto. The angular velocity of the members can be controlled by gears, a timing chain and sprockets, or other timed drive means. As the first member rotates with the second member moving around the pivotal connection point at the same angular velocity, a lift point or pump connection is moved in a reciprocating manner to provide lift. The members can be appropriately counterbalanced. The members can also be provided on either side of the gear reducer to provide dual lift points. If a chain is used for timing the members, the chain can be enclosed in a housing with an oil bath.