Two-piece mount/demount head for a wheel servicing machine

A mount/demount head apparatus usable on a tool holder shaft extending from a swing arm on a tire changing machine for performing tire changing operations on a wheel rotatably mounted on the machine, the apparatus comprising:

• a head body;
• a bead lifter tool projecting from the head body in a first direction;
• a tongue member extending from the head body in a second direction generally opposite the first direction, wherein the tongue member is freely pivotable relative to the head body at a pivotable tongue joint during the tire changing operations about a tongue pivot axis offset from the tool holder shaft, the tongue member including:
• a tongue shoulder disposed on the tongue member facing away from the head body, a face of the tongue shoulder having an orientation that is substantially parallel with the tongue pivot axis;
• a tongue blade extending from the tongue shoulder, the tongue blade including an upper tongue blade surface having a first blade surface region oriented approximately perpendicular to the tongue pivot axis and a second blade surface region sloping downwardly and radially outwardly away from the first blade surface region;
• a tongue flange extending from the tongue shoulder above the tongue blade;
• and
• a tongue guide recess defined in the tongue shoulder between the tongue flange and the tongue blade;
• a coupling disposed on the head body;
• a socket defined in one of either the coupling or the tool holder shaft;
• and
• wherein:
• the coupling is configured to secure the head body to the tool holder shaft at the socket;
• and
• the head body is angularly adjustable relative to the tool holder shaft when secured to the tool holder shaft.