Abstract: A refrigerant recovery apparatus for transferring refrigerant from a first container to a second container includes a compressor having a suction side and a discharge side, a condenser coupled with the discharge side of the compressor and first and second refrigerant inlets and first and second refrigerant outlets. The first and second refrigerant inlets are in fluid communication with the suction side of the compressor. A liquid/vapor switch is suitably positioned between the first refrigerant inlet and the suction side of the compressor to detect whether refrigerant passing through the first refrigerant inlet is in a liquid state or a vapor state. First and second refrigerant outlets are in fluid communication with the discharge and suction sides of the compressor, respectively. The first refrigerant inlet is in fluid communication with the first refrigerant outlet, bypassing the condenser and the compressor.

Abstract: A combined refrigerant recovery, evacuation and recharging apparatus for transferring refrigerant from a first container to a second container and deeply evacuating the first container. The apparatus includes a compressor having a suction side and a discharge side, a vacuum pump having a suction side and a discharge side, and a motor which is coupled with and drivingly engageable to the compressor and the vacuum pump.

Abstract: A combination fluid level indicator and fluid discharge device is provided for preventing inaccurate fluid level indications and facilitating fluid discharge from a compressor or other container. The device includes a body or conduit having an inlet end installed in an aperture through to a compressor housing to fluidly communicate with the compressor and receive the lubricating oil therefrom. A visual indicator provides an indication of the level of the oil within the compressor housing. A discharge port with cap, plug, valve or other flow control member permits selective discharge of the fluid from the compressor through the body. The device is installed in an aperture extending through a side of a compressor housing proximate the bottom thereof and indicates the level of lubricating oil within the housing and permits discharge of oil from the housing.

Abstract: A hand-transportable unit for transferring refrigerants between containers includes a pump to remove refrigerant from a first container The pump is driven by a pneumatic motor. The pump is capable of transferring refrigerant in liquid form, vapor form, or simultaneously in both forms. A condenser for cooling refrigerant is in fluid communication with the pump. The unit also includes a compressor for driving the pneumatic motor to operate the pump. Optionally, the pump may be powered from an external source of compressed gas. The other components of the unit are mounted to a handcart including a frame and wheels to facilitate movement of the unit. In a preferred embodiment, unit is configured for self-evacuation by use of the pump in order to avoid cross-contamination of different refrigerants during subsequent use of the unit.

Abstract: A hand-transportable unit for transferring refrigerants between containers includes a pump to remove refrigerant from a first container. The pump is driven by a pneumatic motor. The pump is capable of transferring refrigerant in liquid form, vapor form, or simultaneously in both forms. A condenser for cooling refrigerant is in fluid communication with the pump. The unit also includes a compressor for driving the pneumatic motor to operate the pump. Optionally, the pump may be powered from an external source of compressed gas. The other components of the unit are mounted to a handcart including a frame and wheels to facilitate movement of the unit. In a preferred embodiment, unit is configured for self-evacuation by use of the pump in order to avoid cross-contaimination of different refrigerants during subsequent use of the unit.