Abstract: A docking fixture for removal of a valve core from a valve fitting of a pressurized system includes a main body defining a hollow main channel that receives a gripping probe to remove the core of a charging valve that is part of a pressurized HVAC system. The docking fixture has a proximal end that can be connected to the HVAC fitting that houses the valve core that is to be removed and replaced. The docking fixture has a side port integrated with a slide valve that can be closed to isolate and protect a sensitive vacuum pressure gauge that might be connected to the free end the fixture's side port. The slide valve includes a sleeve and a tactile feedback mechanism that is configured to provide tactile sensation when the sleeve is positioned in one of the open position and the closed position of the slide valve.

Abstract: An apparatus includes a tool holder, a knob, and a clutch coupling the tool holder to the knob and including a biasing element disposed between a first detent button and a second detent button. The knob defines an internal surface with an engaging surface disposed facing the tool holder and defining a first wedge-shaped protuberance that includes a first stop surface and a first ramp surface. The distal ramp surface is disposed contacting one of the first detent button and the second detent button when the knob rotates in the first rotational direction about the central longitudinal axis. The distal stop surface is disposed to contact one of the first detent button and the second detent button when the knob plate rotates in the second rotational direction about the central longitudinal axis.