Transplanting the end plate and output shaft from one motor onto another creates a gear motor with dual output, which makes an extremely compact design and simplifies plumbing over using two separate motors.
Steven Peek, P.E., an engineer at a manufacturer of road construction equipment, was looking for way to speed up roadway resurfacing of a machine. He decided on implementing the Ralumac process, where aggregate, Portland cement, water, emulsion, and additives are stored separately on the resurfacing vehicle. Materials are mixed automatically at the job site and then conveyed to a screed box at the road surface while the vehicle creeps forward at 90 to 180 ft/min or less. This method lets traffic resume on the new surface in only about 15 min.
But ingenuity was required to build the equipment to put the concept into practice. The package of controls, hoppers, conveyers, and hardware had to be mounted on a 3-axle, 10-wheel heavy truck. Because exacting material proportions were essential, it was important for the operator to have the ability to cut off either the aggregate or emulsion feed when required. Space was at a premium, so drive size was an important consideration. Peek solved part of the problem by creating a “two-headed” hydraulic motor.