Patent ID: 7588059

Claim:
A fluid dispensing tool assembly adapted to be releasably connected to a fluid system for first evacuating the system and then filling the system with a charge of fluid, said tool assembly comprising an upper tool unit including a body defining an evacuation port adapted to be connected to a suction tube and a fluid inlet port adapted to be connected to a source of fluid, a power actuated valve member within said upper tool unit for each of said ports and supported by said upper tool unit for movement between an open position and a closed position for the corresponding said port, a lower tool unit releasably connected to said upper tool unit and including an annular body having an upwardly projecting tubular portion surrounding an elongated center tube member defining a fluid passage, with said tubular portion and said tube member projecting upwardly into said body of said upper tool unit, a sealing member on said lower tool unit to form a fluid-tight seal between said center tube member within said lower tool unit and an annular seat on the fluid system, movable clamping members for releasably connecting said lower tool unit to the fluid system when said lower tool unit is connected to said upper tool unit, a quick release coupler supported by said body of said upper tool unit and releasably connecting said lower tool unit to said upper tool unit to connect said passage within said tube member selectively to said evacuation port and said fluid inlet port in response to actuation of the corresponding said valve members, said quick release coupler including a spring biased tubular locking sleeve surrounding said center tube member and supported for axial movement within said body of said upper tool unit between a released position and a locked position, said locking sleeve surrounding a set of balls engaging said upwardly projecting tubular portion of said body of said lower tool unit, and said lower tool unit and said center tube member being quickly releasable and removable from said upper tool unit in response to axial movement of said sleeve while each said valve member is in said closed position in said upper tool unit to provide for quickly connecting a different said lower tool unit to said upper tool unit.