US 6,149,065 AGranted

Modulating thermostat for gas oven burner

AssigneeHarper-Wyman Company

InventorsDavid B. White, Charles S. White

Life of this patent

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Abstract

A modulating thermostat for a gas oven includes a body with supply, main and pilot passages. Feeder passages from the supply passage to the main and pilot passages provide a pilot gas flow for a pilot burner and a minimum combustion bypass flow to a main oven burner. The feeder passages are drilled along paths leading from mouths of the main and pilot passages and adjustment sleeves installed at the mouths adjust the gas flows for particular oven and fuel requirements. A temperature modulating valve assembly in the supply passage includes a valve member cooperating with a valve seat in the body to modulate gas flow and maintain an oven temperature set by rotation of a valve stem at the front of the thermostat. The thermostat is calibrated by rotating a sleeve accessible through the hollow stem at the front of the thermostat.

Claims10

Dependent claims

A modulating thermostat for supplying gas from a gas supply to an oven having a main burner, a pilot burner and a temperature sensor, said thermostat comprising:

a body having a front wall and a rear wall;
a supply passage extending between said front and rear walls and including an inlet section adapted to be connected to the gas supply and an outlet section;
a temperature responsive valve separating said inlet and outlet sections of said supply passage, said temperature responsive valve including a valve seat and a modulating valve member adapted to be connected to the oven temperature sensor;
main and pilot passages extending between said front and rear walls spaced from one another and from said supply passage and each having a mouth at said front wall;
a main burner outlet port in said rear wall adapted to be connected to the oven main burner and communicating with said main passage;
a pilot burner outlet port in said rear wall adapted to be connected to the oven pilot burner and communicating with said pilot passage;
an outlet passage extending from said outlet section of said supply passage to said main passage;
a bypass feeder passage extending from said inlet section of said supply passage to said main passage;
and
a pilot feeder passage extending from said inlet section of said supply passage to said pilot passage;
said modulating thermostat being characterized by:
said main and pilot passages each extending along a single straight line from said front to said rear wall;
said bypass feeder passage extending in a single straight line beginning at said mouth of said main passage and extending to said inlet section of said supply passage;
and
said pilot feeder passage extending in a single straight line beginning at said mouth of said pilot passage and extending to said inlet section of said supply passage.

12 more elements

A modulating thermostat for supplying gas from a gas supply to an oven having a main burner, a pilot burner and a temperature sensor, said thermostat comprising:

a body having a front wall and a rear wall;
a supply passage extending between said front and rear walls and including an inlet section adapted to be connected to the gas supply and an outlet section;
a temperature responsive valve separating said inlet and outlet sections of said supply passage, said temperature responsive valve including a valve seat and a modulating valve member adapted to be connected to the oven temperature sensor;
main and pilot passages extending between said front and rear walls spaced from one another and from said supply passage and each having a mouth at said front wall;
a main burner outlet port in said rear wall adapted to be connected to the oven main burner and communicating with said main passage;
a pilot burner outlet port in said rear wall adapted to be connected to the oven pilot burner and communicating with said pilot passage;
an outlet passage extending from said outlet section of said supply passage to said main passage,
a bypass feeder passage extending from said inlet section of said supply passage to said main passage;
and
a pilot feeder passage extending from said inlet section of said supply passage to said pilot passage;
said modulating thermostat being characterized by:
bypass and pilot adjustment sleeves received in said mouths of said main and pilot passages for adjusting the flows from said bypass and pilot feeder passages into said main and pilot passages;
and
each said adjustment sleeve including a tubular portion received in the corresponding said mouth and an opening in said tubular portion aligned with said corresponding feeder passage by rotation of said adjustment sleeve.

11 more elements

Dependencies are inferred from the claim text.