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Temperature-setting system for thermostatic mixing valve

Image Number 2 for United States Patent #5251811.

A thermostatically regulated mixing valve having a housing extending along an axis and a stem in the housing axially displaceable to adjust the thermostatically regulated temperature of the valve has a control assembly with a nut threaded on the housing, axially linked to the valve stem, and rotatable about the axis in one direction to move axially inward and move the stem axially inward and rotatable in the opposite direction to move axially outward and move the stem axially outward. An abutment sleeve is fixed to the valve housing and a sleevelike knob engages over the nut and abutment sleeve and is formed with an inwardly projecting stop. Splines on the knob and on the nut rotationally couple same together but permit relative axial movement so that the knob rotates with the nut but does not move axially therewith. A stop ring between the knob and the sleeve has an outwardly projecting stop angularly engageable with the stop of the knob and further splines on the ring and on the knob rotationally couple same together and permit same to be fixed angularly relative to each other in any of a multiplicity of angularly offset positions.

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