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US 4,543,974 AGranted
Gas valve with combined manual and automatic operation
AssigneeHoneywell Inc.
InventorsPaul Dietiker, Yong C. Kim, Marvin D. Nelson, Elwyn H. Olson
Life of this patent
Estimating the term…
Abstract
A gas valve assembly has a safety valve and two controlled valves connected in series. A first of the controlled valves is electromatic and a second is a conventional pressure controlled valve. A control knob provides for manual control of the safety valve and for locking the first electromagnetically controlled valve in an off position. The manual control knob, when in the off and pilot positions, causes a stop member to be moved against the movable core member of the electromagnetic operator to hold the electromagnetic controlled valve in an off position.
Claims19
A manually operated fuel valve comprising,
- a valve body having an inlet opening adapted to be connected to a source of fuel under pressure and an outlet opening adapted to be connected to a fuel consuming apparatus,
- safety valve means and a control valve means connected in series in said valve body between said inlet and outlet openings, electromagnetic actuator means connected to said control valve means,
- a pilot valve means adapted to control the flow of fuel to a pilot burner,
- manual operator means mounted on said valve body,
- first means released by said manual operator means when in a first position and connected to said pilot valve means to provide for separate manual operation of said pilot valve means and said safety valve means, when said first means is pushed downward to first open said pilot valve means to allow the flow of fuel to said pilot burner and further downward movement of said first means will permit said pilot valve to engage and open said safety valve means until a pilot frame is established at the pilot burner to maintain said safety valve means open independent of said first means and then allowing said first means to return to a pilot valve position, and
- further means connected to said manual operator means when in said first position to hold said control valve closed regardless of the energization of said electromagnetic actuator means to open said control valve.
3 more elements
A gas valve assembly comprising,
- a valve body having an inlet opening adapted to be connected to a source of gas under pressure and an outlet opening adapted to be connected to a gas consuming apparatus,
- safety valve means and a control valve means connected in series in said valve body between said inlet and outlet openings,
- pilot valve means connected upstream said safety valve means for controlling the flow of gas to a pilot inlet passage to a pilot burner,
- said safety valve means compressing a pilot burner flame providing means responsive to the presence of a pilot burner flame to hold said safety valve means open when it is opened,
- electromagnetic actuator means connected to said control valve means for operating said control valve means to an open position upon energization of said actuator means,
- manual operator means mounted on said valve body,
- first means operatively assocated with said operator means and connected to said pilot valve means to provide for manual operation of said safety valve means by said pilot valve means engaging said safety valve means to open said safety valve means when said manual operator means is in a "pilot" position, and
- further mechanical means connecting said manual operator means when in said "pilot" position to hold said control valve closed regardless of the energization of said electromagnetic actuator means whereby upon said manual operator means being moved to an "on" position said electromagnetic actuator means can open said control valve means.
5 more elements
A gas valve assembly comprising,
- a valve body having an inlet opening adapted to be connected to a source of fuel under pressure and an outlet opening adapted to be connected to a fuel consuming apparatus,
- safety valve means and a control valve means connected in series in said valve body between said inlet and outlet openings,
- electromagnetic actuator means connected to said control valve,
- manual operator means mounted on said valve body having "off", "pilot", and "on" positions,
- first means operatively associated with said operator means to prevent separate manual operation of said safety valve when said operator is in said "off" position and to provide for separate manual operation of said safety valve when said manual operator means is in said "pilot" position, and
- further mechanical means operatively connecting said operator means frame within said actuator means when in said "off" position and said "pilot" position to hold said control valve closed irrespective of the energization of said electromagnetic actuator means and for operatively releasing said mechanical means when said manual operator means is in said "on" position for allowing the energization of said electromagnetic actuator means to open said control valve.
3 more elements
Dependencies are inferred from the claim text.