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US 7,171,984 B2Granted
Mixer tap
AssigneeGrohe Water Technology AG & Co. KG
InventorsManfred Pawelzik, Fred Hannemann
Life of this patent
Estimating the term…
Abstract
A mixing valve has a housing having hot- and cold-water inlets and at least one hot-, cold-, or mixed-water outlet. Respective hot- and cold-water valves in the housing each have a valve stem rotatable to control flow through the respective valve and carrying a respective externally toothed gear. Respective hot- and cold-water control rings rotatably mounted about a common axis on the housing each have internal teeth in continuous mesh in all angular positions of the valves and rings with the gears of the respective valves.
Claims20
A mixing valve comprising:
- a housing having hot- and cold-water inlets and at least one hot-, cold-, or mixed-water outlet;
- respective hot- and cold-water valves in the housing each having a valve stem rotatable to control flow through the respective valve;
- respective externally toothed gears fixed on the valve stems;
- and
- respective hot- and cold-water control rings rotatably mounted about a common axis on the housing and each having internal teeth in continuous mesh in all angular positions of the valves and rings with the gears of the respective valves.
2 more elements
Dependencies are inferred from the claim text.