Damper control apparatus
OwnerPaul F. Swensoninventor
Life of this patent
Estimating the term…
Abstract
An apparatus for opening and closing the draft hood discharge opening and vent and fuel line of a fluid fuel-fired heating device such as a domestic water heater. The disclosed apparatus includes a diaphragm-type expansible chamber fluid motor assembly positioned in the burner fuel supply line. The motor assembly is mechanically linked to a damper assembly such that the supply of pressurized fuel acts to actuate the motor for opening the damper assembly prior to the motor assembly admitting fuel to the burner. Additionally, when the supply of fuel is terminated, the motor assembly does not close the damper assembly until after the motor assembly stops fuel to the burner.
Claims14
In a heating apparatus of the type including a fluid fuel burner, a flue duct for discharging the products of combustion produced by said burner, a supply line for supplying fluid fuel to said burner and a valve means operable between open and closed positions for controlling the flow of fuel through said supply line to said burner, the improvement comprising:
- at least one damper means movable between open and closed positions for controlling flow through said flue duct;
- expansible chamber fluid motor means connected to said flow control damper means for moving said damper means to an open position when pressurized and to a closed position when unpressurized;
- and,
- connection means for pressurizing said expansible chamber motor means whenever said valve means is in an open position, and said expansible chamber motor means including control means for preventing the flow of fuel to said burner until said damper means are in an open position.
In a heating apparatus including a fuel burner, a supply line for conducting fuel to the burner, a first valve for controlling flow through the supply line to the burner and a vent duct for conducting the products of combustion from the burner to a location exterior of the apparatus, the improvement comprising:
- a damper means mounted for movement between a first position to permit flow through the vent duct and a second position to block flow through the vent duct;
- an expansible chamber motor means positioned in said supply line between said valve and said burner and including a wall portion movable from a first to a second position when said chamber is pressurized by fuel flowing to said chamber upon opening of said first valve;
- a second valve means located in said supply line between said first valve and said burner;
- and,
- mechanical drive means interconnecting said movable wall means and said damper means for actuating said damper means to said first position when said wall means moves to said first position, said second valve means being connected to open only when said damper means moves to said first position.
In a heating apparatus of the type including a fluid fuel burner, a flue duct for discharging the products of combustion produced by said burner and a valve means operable between open and closed positions for controlling the flow of fuel through said supply line to said burner, the improvement comprising:
- at least one damper means movable between open and closed positions for controlling flow through said flue duct;
- fluid motor means connected to said damper means for moving said damper means to an open position and to a closed position;
- and,
- connection means for pressurizing said fluid motor means whenever said valve means is in an open position, and control means for preventing the flow of fuel to said burner until said damper means are in an open position.
In a heating apparatus including a fuel burner, a supply line for conducting fuel to the burner, a first valve for controlling flow through the supply line to the burner and a vent duct for conducting the products of combustion from the burner to a location exterior of the apparatus, the improvement comprising:
- a damper means mounted for movement between a first position to permit flow through the vent duct and a second position to block flow through the vent duct;
- a fluid motor means positioned in said supply line between said valve and said burner and including a portion movable from a first to a second position when said motor is pressurized by fuel flowing thereto upon opening of said first valve;
- a second valve means located between said first valve and said burner;
- and,
- mechanical drive means interconnecting said portion and said damper means for actuating said damper means to said first position and said second position, said second valve means being connected to open only when said damper means are in said first position.
Dependencies are inferred from the claim text.