Abstract: A horizontal directional drilling system. The system has a pilot drill and an exit side drill, with a drill string extending between them. A backreamer is positioned between the drills to enlarge a borehole. The pilot drill pulls and rotates the backreamer. The exit side drill adds segments to the product pipe and pushes the product pipe into the enlarged borehole. The exit side drill is equipped with a rotational disconnect. The disconnect is engaged to allow torque transfer between a motor and a spindle when adding segments to the product pipe. The disconnect is disengaged to prevent torque transfer between the motor and the spindle when pushing the product pipe into the enlarged borehole.

Abstract: A point to point, point to multipoint, or multipoint to multipoint integrated inverter compressor variable volume refrigerant loop data center cooling unit and control system used to regulate volume of refrigerant to air handling systems used to supply cold air ventilation to data center rooms and to the electronic equipment mounted therein which require constant cooling by using a control system controlling variable speed pumps, fans, compressors and condensers to operate a one or a plurality of closed loop, variable volume refrigerant loop systems in conjunction with one or a plurality of associated interior air handling systems located within a data center.

Abstract: A mobile computer cabinet with integrated cooling and UPS power assembly with control system used to house, cool and provide UPS power to the electronic components and devices within the cabinet. Cooling consists of a door mounted AC panel with associated metal, ceramic or composite baffles, vents, openings and enclosed channels to control the flow of air, dissipate heat, and maintain flow speed, volume and temperature to cool all devices within efficient operational constraints. Power is provided by onboard UPS (uninterruptable power supply) to provide emergency power to the electronic components and the cooling system. The entire assembly is integrated into a standard computer cabinet movable via casters having a single point of connection to the facility.