Abstract: A refrigerant dispensing tool includes a three section body with a top manifold section having an evacuation port, a refrigerant supply port and an oil supply port. The intermediate body section has three elongated and converging valve chambers which connect with the corresponding ports and receive corresponding elongated fluid pressure balancing valve members. The valve members are independently operated and precisely controlled by corresponding air actuated pistons which receive pressurized air from corresponding air ports within the manifold section. An air actuated and spring biased annular piston is supported between the intermediate and base sections of the body and operates a set of circumferentially spaced balls which releasably clamp the tool to a stem valve fitting for a refrigerant system.

Abstract: A fluid dispensing tool includes a three section aluminum body defining a top evacuation port and a top fluid fill port each having an annular valve seat and connected by a cross passage. Poppet valve members are supported for vertical movement between retracted open positions below the cross passage and closed positions extending upwardly through the cross passage and engaging the valve seats. The valve members are air actuated in an alternating manner with the evacuation valve member closing before the fluid valve member opens and vice versa. A center passage extends downwardly from the cross passage and through a downwardly projecting discharge spout which carries a sleeve or shuttle supporting a set of resilient sealing bands. The sealing bands are compressed axially by an air actuated piston and expand radially outwardly for sealing with a radiator fill neck above and below a port for an overflow container.