Temperature limiting control valve for a shower head

A temperature limiting control valve for a shower head comprising:

• a housing having an internal water chamber with a water inlet and outlet;
• a water diversion piston slidably mounted in the internal water chamber of the housing for movement between an open and a closed position, the piston having a water inlet and water outlet;
• a bellows-type thermostat mounted in the water inlet of the water diversion piston and having a valve and valve seat with the valve being unseated when the thermostat is open and seated against the valve seat when the thermostat is closed by a predetermined water temperature in the water chamber, the valve and valve seat being positioned to allow water to flow into the water inlet of the water diversion piston when the valve is in the unseated position and to substantially prevent water from flowing into the water diversion piston when the valve is in the seated position;
• a cylinder-like button mechanically connected to the water diversion piston having a first, retracted, position when the water diversion piston is in the open position and a second, extended, position when the water diversion piston is in the closed position, and the button being externally accessible through an opening in the housing when in the extended position;
• and
• an overflow passage extending through the housing and having an inlet in the internal water chamber and an outlet external to the housing, and the cylinder-like button being positioned to close the inlet of the overflow passage in the first position and open the inlet of the water overflow passage in the second position.

A temperature limiting control valve for a shower head comprising:

• a housing having a cylindrically- shaped internal water chamber with a water inlet and outlet, and having a plate defining the water outlet for engagement of the water diversion piston, when the water diversion piston is in the closed position;
• a disc-shaped water diversion piston axially slidably mounted in the internal water chamber of the housing for movement between an open and a closed position, the piston having a water inlet side and a water outlet side and having eight holes to allow water to flow through, which are sealable against a gasket on the plate of the housing when the water diversion piston is in the closed position;
• a bellows-type thermostat mounted in the water inlet of the water diversion piston and having a valve and valve seat with the valve being unseated when the thermostat is open and seated against the valve seat when the thermostat is closed by a predetermined water temperature in the water chamber, the valve and valve seat being positioned to allow water to flow into the water inlet of the water diversion piston when the valve is in the unseated position and to substantially prevent water from flowing into the water diversion piston when the valve is in the seated position;
• a cylinder-like button mechanically connected to the water diversion piston having a first, retracted, position when the water diversion piston is in the open position and a second, extended, position when the water diversion piston is in the closed position, and the button being externally accessible through an opening in the housing when in the extended position where the water diversion piston having a spring attached helps reset the water diversion piston when the button is repositioned into the retracted position;
• and
• an overflow passage extending through the housing and having an inlet in the internal water chamber and an outlet external to the housing, and the cylinder-like button being positioned to close the inlet of the overflow passage in the first position and open the inlet of the water overflow passage in the second position.