Gas control valve in water heater
First Claim
1. A gas control valve in a water heater comprising a pilot valve and a main valve aligned along one axis and arranged operable with an ignition knob for opening and closing the pilot valve and the main valve, wherein the pilot valve and the main valve are opened in this order and closed in reverse order.
1 Assignment
0 Petitions
Accused Products
Abstract
A gas control valve in a water heater is provided for improving the ease of assembling, minimizing the size and the cost, and decreasing the limitation of layout design.
For example, in a flame-retention, storage type closed vessel gas water heater for automatically controlling the temperature of hot water in a tank to a predetermined temperature, a cam member 3 having a pilot cam surface 3b, a main cam surface 3a, and an extinction cam surface 3c thereof arranged along one track is fixedly mounted on an ignition operating shaft 2 equipped with an ignition knob 1 for turning together and also arranged for direct engagement with the proximal end 13a of the valve pin 13 which has a pilot valve V1 fixedly mounted on the distal end thereof, a main valve V slidably mounted thereon below the pilot valve V1, and a main valve opening collar plate 14 fixedly mounted thereon below the main valve V as spaced by a given distance “a” from the same so that the valve pin 13 can be shifted forward and backward by a predetermined sequence of actions of the cam member 3 to open and close the pilot valve V1 and the main valve V aligned along the axis of the valve pin 13 in response to the movement of the ignition knob 1 for controlling the supply of fuel gas to turn on and off the combustion of the water heater.
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Citations
2 Claims
- 1. A gas control valve in a water heater comprising a pilot valve and a main valve aligned along one axis and arranged operable with an ignition knob for opening and closing the pilot valve and the main valve, wherein the pilot valve and the main valve are opened in this order and closed in reverse order.
Specification