Abstract: This is a method and apparatus for practicing the method, for the utilization of geothermal energy for the production of power, wherein a fluid (stream and/or hot liquid, or the like) from a geothermal aquifer is brought up the surface of the Earth through several wells of a group, and returned as condensate after passing through an energy extractor through another well, or wells of the group, and wherein a reversible flow arangement is provided whereby the fluid may be taken from different wells and utilized with the condensate going back through different wells successively and in turn by means of which salt deposits are eliminated, the heat of the aquifer is maintained, and maximum energy exraction is achieved.

Abstract: A vehicle, such as a single truck or a truck-and-trailer combination, having a power plant, has primary ground-engaging wheels driven by the power plant and a hydraulic pump, also driven by the plant and connected by ducts to a variable-displacement motor which is mechanically coupled to drive secondary driving wheels, e.g., tandem wheels on the truck or wheels on a trailer, there being first and second ducts between the pump and motor, and the displacement of the motor can be altered to equalize substantially the pressures within the two ducts when the vehicle moves ahead on straight road affording good traction. Substantially no power is transmitted through the ducts while the vehicle moves on said road, but when one of, e.g., the primary driving wheels slips, either forwardly or backwards, hydraulic fluid is transmitted through the ducts to retard or speed-up the primary driving wheel through the pump.

Abstract: A method and an apparatus for performing said method, for the safety braking of automotive vehicles wherein a trailer is pulled by a prime mover, in such manner so as to eliminate the problems of jack-knifing and the like on sudden stops, and wherein a feature of the method and apparatus involves the dynamic augmentation of the braking torque of an over-driven motor, where the motor is connected to the trailer wheels and the friction brake is added to the negative torque of the over-driven motor in proportion to the negative torque generated by the over-driven motor during deceleration.

Abstract: This is a method, and apparatus for practicing the method, for the transfer of geothermal energy and for its use in the production of power, wherein an energy extractor is placed within each of two wells (or within each well of two groups of wells) in such manner that the steam created by a geothermal aquifer into which the well is drilled creates power by passing over the energy extractor in one well (or group) and the steam is further passed beyond the energy extractor within the well and brought out of the well for further power generation, and, in which the condensate returns to the aquifer through the second well, and, wherein a reversible flow arrangement is provided whereby the steam may be alternately taken from the second well (or group) and utilized, with the condensate going back to the first well (or group) in such manner that solids deposited within each well are alternately eliminated, and the heat of the aquifer is uniformly maintained.