Abstract: A refrigerant recovery unit is provided in which four distinct refrigerant flow paths are automatically controlled by the unit components to perform four separate and distinct functions. In a liquid refrigerant path, liquid refrigerant is recovered from the discharge side of a disabled unit through the refrigerant recovery unit by use of the differential pressure between the disabled unit and the refrigerant receiving can. In a primary vapor path, evacuation of gaseous refrigerant from the high and low sides of the disabled unit is achieved by use of a compressor in the recovery unit which produces a differential pressure to induce flow. This differential pressure is produced solely by the recovery unit compressor until such time as the intake pressure of the compressor reaches approximately 4 inches Hg. vacuum. When the compressor intake pressure reaches 4 inches Hg.

Abstract: An automatic charge or recharge refrigerant transfer system, increases the percentage of refrigerant transferred from a container to the air conditioning unit to be charged. The suction line of the compressor of the air conditioning unit is connected to the discharge of the transfer unit and the discharge of the recovery system is connected to the intake of the transfer unit. The intake of the recovery system is connected to the refrigerant source. The transfer system has an automatic flow path, a manual flow path and a return flow path. The automatic flow path automatically controls the flow of refrigerant from the source through the recovery system to the air conditioning unit at a predetermined maximum pressure level. The parallel manual flow path permits use of a hand valve to control the flow of refrigerant from the source through the recovery system to the air conditioning unit.

Abstract: A circuit for recovering refrigerant from a disabled refrigeration unit combines a vacuum pump, vapor pump or compressor in series with a compressor for drawing gaseous refrigerant from the disabled unit. The series arrangement of the vacuum source and the compressor provides approximately -29 inches of mercury at the suction side of the vacuum source. A condensor in series with the compressor converts the gaseous refrigerant into a liquid refrigerant and a storage tank in series with the condenser receives liquid refrigerant from the condenser. In one preferred arrangement a valve system connected in series between the condenser and the storage tank allows the storage tank to be disconnected from the circuit without release of refrigerant from the tank to the atmosphere. The circuit may also include a coil in parallel with the condenser and the compressor and helically disposed around the storage tank for cooling the storage tank.

Abstract: A method and apparatus for aligning and securing auxiliary equipment and structures with respect to a well drilling platform comprising a pair of elongated hydraulic jacks spaced apart in a non-parallel configuration, said jacks being pivotally secured between the base portions of the drilling platform and the auxiliary structure and lying in a substantially horizontal plane, whereupon, activation of the jacks pulls the auxiliary structure into substantial alignment and spacing with respect to the drilling platform. Upon alignment and spacing, a pair of pivotal connecting links secures the base portion of the structure to the base portion of the platform and including a pair of longitudinally adjustable upper connecting links secured between the upper portions of the platform and the structure whereby adjustment in length of said upper connecting links compensates for a slightly unlevel drilling site, said auxiliary structure serving to stabilize said platform against side loads.

Abstract: A system for disposing of fly ash where the dry fly ash is transported by pneumatic hose to a portable container which is utilized in the manner of a mold. The container is of a general truncated pyramidal shape, closed at the top end and open at the bottom. The fly ash is blown into the container and simultaneously wetted by sprayed liquid within the container. The air which is used for transporting the fly ash is removed from the container by a filtering system and the fly ash is allowed to harden into cement-like ingots or cakes for further handling thereof.