US4242080A — Safety device for gas burners

Claim 1

Independent Claim 248 words

A safety device adapted for use with a gas combustion apparatus having a pilot which is proven by a thermocouple, comprising, a valve body having an inlet opening adapted to be connected to a source of gas under pressure, outlet opening adapted to be connected to a main burner of the combustion apparatus, and a second outlet opening adapted to be connected to a pilot, safety valve means connected between said inlet opening and said outlet openings to shut off gas flow when in an inoperative position and held in an operative position by an electromagnetic device energized by a pilot heated thermocouple, main valve means connected in series with said safety valve means, manual means movable in an axial and rotative direction connected to said main valve means axially from said inoperative position to said operative position and for rotating said main valve means from an off to on position, first means connected to said manual means for preventing said manual means from rotating said main valve means to said on position unless said manual means is in said operative position, and first pin means dropping in a groove in line with said safety valve means in said body when said safety valve means is in said operative position for preventing axial movement of said manual means to said operative position and thus said manual means is not in a position for rotative movement of said main valve means from said off position to said on position.

Claim 2

Dependent Claim 248 words

A safety device adapted for use with a gas combustion apparatus having a pilot which is proven by a thermocouple, comprising, a valve body having an inlet opening adapted to be connected to a source of gas under pressure, outlet opening adapted to be connected to a main burner of the combustion apparatus, and a second outlet opening adapted to be connected to a pilot, safety valve means connected between said inlet opening and said outlet openings to shut off gas flow when in an inoperative position and held in an operative position by an electromagnetic device energized by a pilot heated thermocouple, main valve means connected in series with said safety valve means, manual means movable in an axial and rotative direction connected to said main valve means axially from said inoperative position to said operative position and for rotating said main valve means from an off to on position, first means connected to said manual means for preventing said manual means from rotating said main valve means to said on position unless said manual means is in said operative position, and first pin means dropping in a groove in line with said safety valve means in said body when said safety valve means is in said operative position for preventing axial movement of said manual means to said operative position and thus said manual means is not in a position for rotative movement of said main valve means from said off position to said on position.

Claim 3

Dependent Claim 117 words

The invention of claim 1 wherein said manual means connecting said manual means to said safety valve means comprises a member attached to said safety valve means having an inclined surface cooperating with an inclined surface of said valve body, and said first pin means normally held in a restricted position from interfering with said manual means and from said groove by the inclined surfaces of said safety valve and said body; however, upon operation of said safety valve means to the operative position, said pin means drops into said groove to restrict the axial movement of said manual means to a position in which said manual means can be rotated to open said main valve means.

Claim 4

Dependent Claim 82 words

The invention of claim 2 wherein said first means comprises second pin member attached to said manual means and detent means in said valve body cooperating with said second pin member for restricting the rotational movement of said manual means depending upon the axial position of said manual means and to allow for movement of said manual means in a rotating manner for a predetermined angle of movement of said manual means when said manual means is in a first axial position.

Claim 5

Dependent Claim 43 words

The invention of claim 3 wherein said inclined surfaces form a support for said first pin in said restricted position and upon said safety valve moving to said operative position, said pin slides down said inclined surface of said body into said groove.

Claim 6

Dependent Claim 210 words

A safety gas valve adapted for use with a gas combustion apparatus having a pilot burner and a main burner wherein a safety valve provides for the flow of gas from an inlet opening adapted to be connected to a source of gas under pressure through a main valve member to a pilot outlet opening and a main burner outlet opening adapted to be connected to a pilot burner and a main gas burner whenever a flame proving apparatus associated with the pilot burner determines that a pilot flame exists and when a manual operator turns the main valve to an off position, the manual operator cannot be moved to an on position as long as the safety valve is open as a result of the residual heat of the flame proving device, the improvement comprising, means connecting the manual operator to said safety valve having a pin member which is held in an inactive position when the safety valve is closed and moves to a restricting position in a groove in the valve body when the safety valve is opened to prevent a manual operating means from moving axially to a position for rotative movement for opening the main valve until the safety valve is in an inoperative position.

Claim 7

Dependent Claim 210 words

A safety gas valve adapted for use with a gas combustion apparatus having a pilot burner and a main burner wherein a safety valve provides for the flow of gas from an inlet opening adapted to be connected to a source of gas under pressure through a main valve member to a pilot outlet opening and a main burner outlet opening adapted to be connected to a pilot burner and a main gas burner whenever a flame proving apparatus associated with the pilot burner determines that a pilot flame exists and when a manual operator turns the main valve to an off position, the manual operator cannot be moved to an on position as long as the safety valve is open as a result of the residual heat of the flame proving device, the improvement comprising, means connecting the manual operator to said safety valve having a pin member which is held in an inactive position when the safety valve is closed and moves to a restricting position in a groove in the valve body when the safety valve is opened to prevent a manual operating means from moving axially to a position for rotative movement for opening the main valve until the safety valve is in an inoperative position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-12-30	1984-06-30	1984-12-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-12-30	1988-06-30	1988-12-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-12-30	1992-06-30	1992-12-30	$7700.00	Window Closed / Lapsed

Safety device for gas burners

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