Fuel control device, fuel control system using the device and method of making the device
This patent describes a fuel control device comprising a housing means having a passage therethrough for interconnecting a fuel source with a main burner means, a throttle valve means disposed in the passage for throttling fuel flow through the passage to the burner means, and selector means operatively interconnected to the throttle valve means to operate the same, the throttle valve means comprising a pair of members one of which is substantially stationary and the other of which is rotatable relative to the one member, the one member having a face and having aperture means interrupting the face thereof and passing therethrough, the other member having a face means disposed in sliding engagement with the face of one member for controlling the effective opening of the aperture means for fuel flow therethrough, the selector means being operatively interconnected to the other member to rotate the same relative to the one member and thereby control the flow of fuel through the passage, the other member having an opening interrupting the face means thereof and being adapted to overlap the aperture means in various positions therewith for controlling the fuel flow therethrough, the improvement wherein the other member comprises a plug valve member, the plug valve member having an axis of rotation and having an end surface disposed substantially transverse to the axis, the end surface comprising the face means thereof, the opening of the plug valve member being offset relative to the axis of rotation thereof, the end surface of the plug valve member being substantially flat and the face of the one member being substantially flat, the plug valve member having a by-pass port interrupting the end surface thereof, the one member having a by-pass port interrupting the face thereof, the by-pass ports being in aligned relation and being coaxial with the axis.
- Assignee:
- Robertshaw Controls Co., Richmond, VA
- Patent Number(s):
- US 4779643
- OSTI ID:
- 6520030
- Resource Relation:
- Patent File Date: Filed date 15 Jul 1987
- Country of Publication:
- United States
- Language:
- English
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