# US 11,029,362 B2 · Non-contact voltage detector

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- Number: US 11,029,362 B2
- Document ID: US11029362B2
- Status: Granted
- Kind: B2
- Application number: 16/853,816
- Filed: 2020-04-21
- Published: 2020-10-08
- Granted: 2021-06-08
- Earliest claimed: 2015-03-20
- Assignees: Klein Tools, Inc.
- Applicants: Klein Tools, Inc.
- Inventors: Bruce Kuhn
- Web page: https://patentgrep.com/patent/US11029362B2

## CPC

- G01R 31/3835: involving only voltage measurements
- G01R 1/06788: {Hand-held or hand-manipulated probes, e.g. for oscilloscopes or for portable test instruments (end pieces terminating in a probe H01R11/18)}
- G01R 1/07: Non contact-making probes
- G01R 19/155: Indicating the presence of voltage
- G01R 29/0857: {Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use (nuclear radiation dosimetry G01T)}
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

A voltage detector includes a cylindrical hollow body housing including an open end and a tool end. An internal circuit assembly includes a voltage sensing loop, a flashlight, and a microprocessor. The internal circuit assembly is disposed inside the cylindrical hollow body housing. The voltage sensing loop is configured to detect voltage without contacting a detected voltage, and the microprocessor is configured to control power to the flashlight via a flashlight power button independently from power to the voltage sensing loop via a voltage detector button.

## Claims

### Claim 1

A control system for a voltage detector having a voltage detector circuit and a flashlight circuit comprising:
a first stage, the first stage corresponding with a deactivated voltage detector circuit and a deactivated flashlight circuit;
a second stage, the second stage corresponding with an activated voltage detector circuit and a deactivated flashlight circuit;
a third stage, the third stage corresponding with a deactivated voltage detector circuit and an activated flashlight circuit; and
a fourth stage, the fourth stage corresponding with an activated voltage detector circuit and an activated flashlight circuit,
wherein the first stage is a default stage, and
wherein:
user action is required to transition from the first stage to any one of the second stage, the third stage, and the fourth stage, and
user action is required to transition from the second stage to the fourth stage.

### Claim 2 (depends on 1)

The control system of claim 1, wherein the voltage detector automatically enters the first stage from the second stage after a first predetermined period of time, and
wherein the voltage detector automatically enters the first stage from the third stage after a second predetermined period of time, the voltage detector issuing an audible alert via a voltage detection speaker before the second predetermined period of time expires.

### Claim 3 (depends on 2)

The control system of claim 2, wherein the voltage detector automatically enters the first stage from the fourth stage after the second predetermined period of time expires.

### Claim 4 (depends on 2)

The control system of claim 2, wherein the second predetermined period of time is greater than the first predetermined period of time.

### Claim 5 (depends on 1)

The control system of claim 1, wherein a timer starts when the voltage detector enters at least one of the second stage, the third stage, and the fourth stage.

### Claim 6 (depends on 5)

The control system of claim 5, wherein if the voltage detector is in at least one of the second stage and the fourth stage, the timer resets when a voltage is detected.

### Claim 7 (depends on 1)

The control system of claim 1, wherein when the microprocessor detects a low battery level, the voltage detector is able to enter the second stage but prevented from entering the third stage or the fourth stage.