Test and measurement device with a pistol-grip handle

Patent metadata

Field	Value
Publication number	US-9696362-B2
Application number	US-201615170163-A
Country	US
Kind code	B2
Filing date	Jun 1, 2016
Priority date	Mar 7, 2008
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A clamp meter configured to receive a removable and rechargeable battery pack. The clamp meter includes a main body having a first axis, a handle, a clamp, a trigger, and a display. The handle has a second axis and includes a first recess configured to receive the battery pack. The first recess includes at least first and second electrical terminals which are exposed when the battery pack is not inserted into the first recess. The second axis forms an oblique angle with the first axis, and the battery pack is inserted into the first recess along the second axis. The clamp is coupled to the main body, aligned with the first axis, and operable to measure an electrical characteristic of a conductor based on an induced current. The trigger is operable to selectively open and close the clamp, and the display configured to display an indication of the electrical characteristic.

First claim

What is claimed is:

1. A clamp meter configured to receive a removable and rechargeable battery pack, the clamp meter comprising:
a main body having a first axis;
a handle having a second axis and including a first recess configured to receive at least a portion of the battery pack, the first recess including first and second electrical terminals which are exposed when the at least a portion of the battery pack is not inserted in the first recess;
wherein the second axis forms an oblique angle with the first axis;
a clamp extending along the first axis coupled to and supported by the main body, the clamp operable to measure an electrical characteristic of a conductor based on an induced current, the clamp including a first jaw and a second jaw;
a trigger operable to selectively open and close the clamp, the trigger positioned below the main body in a second recess of the handle,
a ram supported in the main body, wherein the trigger is operable to move the ram along the first axis toward the first jaw and the second jaw to open the clamp, the ram causing the first jaw to rotate about a first pivot axis and the second jaw to rotate about a second pivot axis to open the clamp; and
a display configured to display an indication of an electrical characteristic of a conductor.

2. The clamp meter of claim 1 , further comprising a non-contact voltage detector.

3. The clamp meter of claim 1 , further comprising an LED flashlight.

4. The clamp meter of claim 3 , wherein the LED flashlight is operable to illuminate a first area enclosed by the clamp.

5. The clamp meter of claim 3 , wherein the trigger is operable to activate the LED flashlight.

6. A clamp meter configured to receive a removable and rechargeable battery pack, the clamp meter comprising:
a main body having a first axis;
a handle having a second axis and including a first recess configured to receive at least a portion of the battery pack, the first recess including first and second electrical terminals which are exposed when the at least a portion of the battery pack is not inserted in the first recess;
wherein the second axis forms an oblique angle with the first axis;
a clamp coupled to and supported by the main body, the clamp operable to measure an electrical characteristic of a conductor based on an induced current, the clamp including a first jaw and a second jaw;
a trigger operable to selectively open and close the clamp, the trigger positioned below the main body in a second recess of the handle,
a ram, wherein the trigger is operable to move the ram toward the first jaw and the second jaw to open the clamp, the ram causing the first jaw to rotate about a first pivot axis and the second jaw to rotate about a second pivot axis to open the clamp; and
a display configured to display an indication of an electrical characteristic of a conductor;
wherein the trigger is operable to activate the LED flashlight;
wherein the trigger is operable to activate the LED flashlight when the trigger is engaged a first distance, and the trigger is operable to open the clamp when the trigger is engaged a second distance.

7. The clamp meter of claim 6 , wherein the second distance is greater than the first distance.

8. The clamp meter of claim 1 , wherein the battery pack is a lithium-ion battery pack.

9. A method of operating a clamp meter, the clamp meter including a main body having a first axis, a handle, a clamp supported by the main body and including a first jaw and a second jaw, a trigger positioned below the main body, a ram supported in the main body, and a display, the method comprising:
powering the clamp meter with a removable battery pack, at least a portion of the battery pack being inserted into a recess of the handle, wherein the handle includes a second axis;
opening the clamp with the trigger, the trigger moving the ram along the first axis toward the first jaw and the second jaw, the ram causing the first jaw to rotate about a first pivot axis and the second jaw to rotate about a second pivot axis to open the clamp;
sensing, using the clamp, a first electrical characteristic based on an induced current,
wherein the clamp extends along the first axis, and
wherein the first axis and the second axis form an oblique angle; and
displaying, on the display, an indication of the first electrical characteristic.

10. The method of claim 9 , wherein the battery pack is a lithium-ion battery pack.

11. The method of claim 9 , further comprising detecting a voltage using a non-contact voltage detector.

12. The method of claim 11 , further comprising activating a voltage sense indicator when the voltage is detected.

13. The method of claim 9 , further comprising illuminating an area enclosed by the clamp using a flashlight powered by the battery pack.

14. The method of claim 13 , wherein the flashlight is an LED flashlight.

15. The method of claim 14 , wherein the LED flashlight is integral to the clamp meter.

16. The method of claim 13 , further comprising activating the flashlight with the trigger.

17. A method of operating a clamp meter, the clamp meter including a main body having a first axis, a handle, a clamp supported by the main body and including a first jaw and a second jaw, a trigger positioned below the main body, a ram, and a display, the method comprising:
powering the clamp meter with a removable battery pack, at least a portion of the battery pack being inserted into a recess of the handle, wherein the handle includes a second axis;
opening the clamp with the trigger, the trigger moving the ram toward the first jaw and the second jaw, the ram causing the first jaw to rotate about a first pivot axis and the second jaw to rotate about a second pivot axis to open the clamp;
sensing, using the clamp, a first electrical characteristic based on an induced current,
wherein the clamp is aligned along a second axis, and
wherein the first axis and the second axis form an oblique angle; and
displaying, on the display, an indication of the first electrical characteristic;
further comprising activating the flashlight with the trigger;
wherein the flashlight is activated by the trigger when the trigger is at a first distance, and the clamp is opened when the trigger is at a second distance.

18. The method of claim 17 , wherein the second distance is greater than the first distance.

19. The method of claim 9 , further comprising measuring, based on signals received through a pair of electrical leads, a second electrical characteristic, wherein the pair of electrical leads are operable to receive a pair of electrical probes.

20. The method of claim 19 , further comprising displaying, on a display, an indication of the second electrical characteristic.

21. The clamp meter of claim 1 , wherein the trigger is operated in a plane including the first axis and the second axis to move the ram along the first axis.

22. The method of claim 9 , wherein opening the clamp with the trigger includes operating the trigger in a plane including the first axis and the second axis to move the ram along the first axis.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Nguyen Evans H
• Bublitz Scott D
• Crowe Jason R
• Jones Mike N

Classifications

• G01R31/58 Primary

  Testing of lines, cables or conductors (testing of electric windings G01R31/72) · CPC title

• G01R1/22

  Tong testers acting as secondary windings of current transformers · CPC title

• G01R1/0408

  Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets (G01R1/067 takes precedence; mass production testing systems G01R31/59; testing of connections G01R31/66; for testing printed circuit boards G01R31/2808) · CPC title

• G01J5/0096

  for measuring wires, electrical contacts or electronic systems · CPC title

• G01R1/20

  Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments · CPC title