Gas valve with emergency shutoff and mechanical timer
A mechanical valve assembly for the control of a gas flow to a gas appliance, the mechanical valve assembly comprising: a housing; a gas inlet port associated with the housing; a gas outlet port associated with the housing; a timer-controlled valve operable to open and close a gas flow between the inlet port and outlet port; and a manually-operated emergency shut-off valve positioned between the inlet port and the outlet port, ahead of the timer-controlled valve relative to a direction of the gas flow through the mechanical valve assembly.
1. A mechanical valve assembly for the control of a gas flow to a gas appliance, the mechanical valve assembly comprising:
a housing;
a gas inlet port associated with the housing;
a gas outlet port associated with the housing;
a non-electric timer-controlled valve operable to open and close a gas flow between the inlet port and outlet port; and
a manually-operated emergency shut-off valve positioned between the inlet port and the outlet port, ahead of the timer-controlled valve relative to a direction of the gas flow through the mechanical valve assembly, and the timer-controlled valve and the emergency shut-off valve include a common shaft assembly that allows a gas flow when not seated and stops a gas flow when seated.
2. The mechanical valve assembly of claim 1 , wherein the emergency shut-off valve is operable to interrupt the gas flow between the inlet port and the outlet port after the gas flow has been opened by the timer-controlled valve.
3. The mechanical valve assembly of claim 1 , wherein the emergency shut-off valve is operable to independently close the gas flow, regardless of whether the timer-controlled valve is in an open or closed state.
4. The mechanical valve assembly of claim 1 , wherein the timer-controlled valve includes a shaft assembly that allows a gas flow when not seated and stops a gas flow when seated.
5. The mechanical valve assembly of claim 1 , wherein the emergency shut-off valve includes a shaft assembly that allows a gas flow when not seated and stops a gas flow when seated.
6. The mechanical valve assembly of claim 1 , wherein depressing and simultaneously turning the emergency shut-off valve allows a gas flow through the housing from the inlet port to the outlet port.
7. The mechanical valve assembly of claim 1 , wherein the timer-controlled valve and the emergency shut-off valve each include a shaft.
8. The mechanical valve assembly of claim 7 , wherein the shaft of the emergency shut-off valve is not collinear with the shaft of the timer-controlled valve.
9. The mechanical valve assembly of claim 1 , wherein the non-electric timer-controlled valve includes a timer mechanism.
10. A gas appliance; the gas appliance comprising:
a mechanical valve assembly for the control of a gas flow to the gas appliance, the mechanical valve assembly including:
a housing;
a gas inlet port associated with the housing;
a gas outlet port associated with the housing;
a non-electric timer-controlled valve operable to open and close a gas flow between the inlet port and outlet port; and
a manually-operated emergency shut-off valve positioned between the inlet port and the outlet port, ahead of the timer-controlled valve relative to a direction of the gas flow through the mechanical valve assembly, and the timer-controlled valve and the emergency shut-off valve include a common shaft assembly that allows a gas flow when not seated and stops a gas flow when seated.
11. The gas appliance of claim 10 , wherein the emergency shut-off valve is operable to interrupt the gas flow between the inlet port and the outlet port after the gas flow has been opened by the timer-controlled valve.
12. The gas appliance of claim 10 , wherein the emergency shut-off valve is operable to independently close the gas flow, regardless of whether the timer-controlled valve is in an open or closed state.
13. The gas appliance of claim 10 , wherein the timer-controlled valve includes a shaft assembly that allows a gas flow when not seated and stops a gas flow when seated.
14. The gas appliance of claim 10 , wherein the emergency shut-off valve includes a shaft assembly that allows a gas flow when not seated and stops a gas flow when seated.
15. The gas appliance of claim 10 , wherein depressing and simultaneously turning the emergency shut-off valve allows a gas flow through the housing from the inlet port to the outlet port.
16. The gas appliance of claim 10 , the timer-controlled valve and the emergency shut-off valve each include a shaft.
17. The gas appliance of claim 16 , wherein the shaft of the emergency shut-off valve is not collinear with the shaft of the timer-controlled valve.
18. The mechanical valve assembly of claim 10 , wherein the non-electric timer-controlled valve includes a timer mechanism.