Temperature responsive valve device

A temperature responsive valve device comprising a body having an inlet port and an outlet port, a valve chamber within said body connecting said inlet port with said outlet port, valve means located in said valve chamber to open and close communication between said inlet port and said outlet port, first and second bimetal temperature responsive discs located in a further chamber in said body, a rod extending between and disposed in engagement with said valve means and said first bimetal disc, said first bimetal disc being adapted to snap over center in response to a first temperature between a first position to urge said valve means in the closing direction through said rod and a second position to allow said valve means to move in the opening direction, spring means for supporting said first bimetal disc and biasing said first bimetal disc, said rod and said valve means in the closing direction, said second bimetal disc adapted to snap over center in response to a second temperature lower than said first temperature between a first position forcing said first bimetal disc against said spring means to allow said valve means to move in the opening direction when said first bimetal disc is in its first position and a second position wherein said second bimetal disc exerts no force on said first bimetal disc whereby said valve means may move from an open condition, to a closed condition and then to a reopened condition in sequence in response to sequential changes in temperature.