# US 11,439,850 B2 · Self contained stovetop fire suppressor with alert signal and method

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- Number: US 11,439,850 B2
- Document ID: US11439850B2
- Status: Granted
- Kind: B2
- Application number: 16/040,931
- Filed: 2018-07-20
- Published: 2020-01-23
- Granted: 2022-09-13
- Earliest claimed: 2018-07-20
- Assignees: WilliamsRDM, Inc.
- Applicants: WilliamsRDM, Inc.
- Inventors: Christopher M Stimek
- Web page: https://patentgrep.com/patent/US11439850B2

## CPC

- A62C 3/006: {for kitchens or stoves}
- G08B 17/02: Mechanical actuation of the alarm, e.g. by the breaking of a wire
- A62C 35/026: {the extinguishing material being put under pressure by means other than pressure gas, e.g. pumps}
- A62C 35/10: Containers destroyed or opened by flames or heat
- G08B 3/10: using electric transmission; using electromagnetic transmission
- G08B 17/06: Electric actuation of the alarm, e.g. using a thermally-operated switch
- A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10)
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

## Abstract

An automatic stovetop fire suppressor with suppressor activation triggering an audible alert of a fire condition and method are provided herein. A plastic bottom lid is secured to a bottom of a can, forming a closed container. A fire suppressing agent and a sound board are housed within the closed container. As the fire suppressor actuator is triggered, the bottom lid lowers releasing the fire suppressing agent and tripping a sound board alert switch. A microcontroller generates a desired fire condition signal which is played across a low voltage magnetic transducer. The suppressor is user friendly, provides an automated release of fire suppressing agent in the presence of a stovetop fire, and emits a continuing audible alert signal until a user disables the same. The fire suppressing agent and battery powered sound board are stored in the closed from manufactured end to activation of the suppressor in a fire condition.

## Claims

### Claim 1

An automatic stovetop fire suppressor, the device comprising:
a thermo-molded plastic can comprising a top wall and a cylindrical sidewall;
a plastic cone shaped bottom lid secured to a bottom of the can and forming a closed container;
a fire suppressing agent housed in the closed container;
a sound board mounted in the closed container;
a spring compressing a sound activation button in the closed container;
a microcontroller mounted on the sound board and electrically connected to an amplifier and
a magnetic acoustic transducer electrically connected to the amplifier.

### Claim 2 (depends on 1)

The device according to claim 1, further comprising:
an amplifier comprising:
a one kilo-ohm resister;
a bipolar junction transistor; and
a diode.

### Claim 3 (depends on 1)

The device according to claim 1, wherein, the magnetic acoustic transducer plays a signal of a first frequency three times followed by a zero volt signal.

### Claim 4 (depends on 1)

The device according to claim 1, further comprising:
a push button mount hole in the cylindrical sidewall.

### Claim 5 (depends on 1)

The device according to claim 1, further comprising:
a first bottom lid angle of 135 degrees toward a bottom lid circumference;
a second bottom lid angle of 30 degrees causing an outer edge of the bottom lid to taper; and
a gap between the bottom lid circumference and a bottom of the cylindrical sidewall formed by the first and the second bottom lid angles.

### Claim 6 (depends on 1)

The device according to claim 1, further comprising:
support ribs integral to the can top wall and positioned above the sound board.

### Claim 7 (depends on 6)

The device according to claim 6, further comprising:
a horizontal distance from the sound board to the cylindrical sidewall of at least 0.5 inches.

### Claim 8 (depends on 7)

The device according to claim 7, further comprising:
a vertical distance from a sound board bottom edge to an inner side of the cone shaped bottom lid of 0.2 to 0.75 inches.

### Claim 9 (depends on 1)

The device according to claim 1 further comprising:
support ribs integral to the can top wall; and wherein,
the sound board mounts between two adjacent support ribs.