Control knob for thermostatically regulated mixing valve

In combination with a thermostatically regulated mixing valve having a housing and a stem extending along an axis in the housing and axially displaceable to adjust the thermostatically regulated temperature of the valve:

• a tubular core body fixed in the housing and aligned with the stem;
• a coupling body axially displaceable in the core body, having an inner end axially engageable with the stem and an outer end formed with a screwthread;
• means including interengaging formations on the coupling body and the core body for inhibiting rotation of the coupling body in the core body while permitting axial displacement of the coupling body in the core body;
• a knob rotatable about the axis and having a screwthread meshing with the screwthread of the coupling-body outer end;
• retaining means engaged between the knob and the core body for inhibiting axial displacement of the knob on the core body and permitting rotation of the knob on the core body, whereby rotation of the knob on the core body axially shifts the coupling body in the core body.