# US 9,428,897 B2 · Touchless activation of a toilet

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- Number: US 9,428,897 B2
- Document ID: US9428897B2
- Status: Granted
- Kind: B2
- Application number: 14/108,144
- Filed: 2013-12-16
- Published: 2015-06-18
- Granted: 2016-08-30
- Earliest claimed: 2012-12-17
- Assignees: Fluidmaster, Inc.
- Applicants: Fluidmaster, Inc.
- Inventors: Tuan Le; Adam Sampson; Derres Catalano; Stewart Walton; Scott Valoff; Robb Milley
- Web page: https://patentgrep.com/patent/US9428897B2

## CPC

- E03D 5/105: {touchless, e.g. using sensors}
- E03C 1/057: {touchless, i.e. using sensors}
- E03D: WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03C: DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER (not connected to either water-supply main or to waste pipe A47K; devices of the kind used in the ground E03B, E03F); SINKS

## Abstract

A toilet sensor and actuator assembly, having: (a) an infrared sensor configured to detect the presence of an object at a far distance from a toilet; (b) an ultrasonic sensor configured to detect the presence of the object at a near distance from the toilet, wherein the ultrasonic sensor remains in a sleep mode until awakened by a signal from the infrared sensor that the infrared sensor has detected the presence of the object at the far distance; and (c) an actuator mechanism that flushes the toilet in response to a signal from the ultrasonic sensor that the ultrasonic sensor has detected the presence of the object at the near distance.

## Claims

### Claim 1

A sensor and actuator assembly, comprising:
an infrared sensor configured to detect the presence of a user at a far distance;
an ultrasonic sensor configured to detect the presence of the user at a near distance, wherein the ultrasonic sensor remains in a sleep mode until awakened by a signal from the infrared sensor after the infrared sensor has first detected the presence of the user at the far distance; and
an actuator mechanism that activates in response to a signal from the ultrasonic sensor that the ultrasonic sensor has detected the presence of the user.

### Claim 2 (depends on 1)

The sensor and actuator assembly of claim 1, wherein the near distance is less than 8 inches.

### Claim 3 (depends on 2)

The sensor and actuator assembly of claim 2, wherein the near distance is less than 3 inches.

### Claim 4 (depends on 1)

The sensor and actuator assembly of claim 1, wherein the actuator is a toilet flush actuator.

### Claim 5 (depends on 1)

The sensor and actuator assembly of claim 1, wherein the actuator is a faucet activation actuator.

### Claim 6 (depends on 1)

The sensor and actuator assembly of claim 1, wherein the actuator is an appliance activation actuator.

### Claim 7

A sensor and actuator assembly for causing a toilet to flush, comprising:
an infrared sensor configured to detect the presence of a user;
an ultrasonic sensor configured to detect the presence of the user; and
an actuator mechanism that activates in response to a signal from the ultrasonic sensor that the ultrasonic sensor has detected the presence of the user, wherein the actuator mechanism comprises:
a solenoid;
a plunger rod in the solenoid, the plunger rod being moved by electric current passing through the solenoid; and
a pneumatic tube or a connecting cable, wherein movement of the plunger rod causes air to move in the pneumatic tube or wherein movement of the plunger rod moves the connecting cable, and wherein the movement of air in the pneumatic tube or the movement of the connecting cable causes the toilet to flush.

### Claim 8 (depends on 7)

The sensor and actuator assembly of claim 7, further comprising:
a housing, wherein the infrared sensor, the ultrasonic sensor and the solenoid are all disposed within the housing.

### Claim 9 (depends on 8)

The sensor and actuator assembly of claim 8, wherein the housing passes through a toilet tank wall.

### Claim 10 (depends on 8)

The sensor and actuator assembly of claim 8, wherein the assembly further comprises:
a battery power supply that supplies power to the infrared sensor and the ultrasonic sensor.

### Claim 11 (depends on 10)

The sensor and actuator assembly of claim 10, further comprising:
a battery canister, wherein the battery canister is connected to the housing and the battery canister is disposed within a toilet tank.

### Claim 12

A method of actuating a device comprising:
detecting the presence of a user at a far distance using an infrared sensor;
detecting the presence of the user at a near distance with the ultrasonic sensor, wherein the ultrasonic sensor remains in a sleep mode until awakened by a signal from the infrared sensor after the infrared sensor has first detected the presence of the user at the far distance; and
activating an actuator mechanism in response to the ultrasonic sensor detecting the presence of the user.

### Claim 13 (depends on 12)

The method of claim 12, the actuator mechanism flushes a toilet.

### Claim 14 (depends on 1)

The sensor and actuator assembly of claim 1, wherein the far distance is up to 10 feet.

### Claim 15 (depends on 1)

The sensor and actuator assembly of claim 1, wherein the far distance is up to 24 inches.