Test and measurement device with a pistol-grip handle

• US 9,385,352 B2
• Filed: 05/06/2014
• Issued: 07/05/2016
• Est. Priority Date: 03/07/2008
• Status: Active Grant

• Current Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Original Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Inventors: Nguyen, Evans H., Bublitz, Scott D., Crowe, Jason R., Jones, Mike N.
• Primary Examiner(s): Assouad, Patrick
• Assistant Examiner(s): Pretlow, Demetrius
• Application Number:
  US14/270,430
• Publication Number:
  US 20140240907A1
• Time in Patent Office: 791 Days
• Field of Search: 324/126, 324/76.11
• US Class Current: 1/1
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• CPC Class Codes: G01J 5/0096 for measuring wires, electrical contacts or electronic systems
• CPC Class Codes: G01R 1/04 Housings; Supporting members; Arrangements of terminals
• CPC Class Codes: G01R 1/0408 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 Class Codes: G01R 1/20 Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
• CPC Class Codes: G01R 1/22 Tong testers acting as secondary windings of current transformers
• CPC Class Codes: G01R 31/58 Testing of lines, cables or conductors testing of electric windings G01R31/72
• CPC Class Codes: H01M 10/488 Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

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.

Claims

1. A test and measurement device comprising:

a device housing including a recess;

a sense circuit supported by the device housing;

a first battery terminal and a second battery terminal positioned substantially within the recess;

a removable battery pack including a battery pack housing and a coupling mechanism that engages the device housing to releasably secure the battery pack to the device housing, the coupling mechanism including a first actuator on the battery pack housing operable to change the coupling mechanism between an engaged state, in which the coupling mechanism engages the device housing, and a disengaged state, only a portion of the battery pack housing being insertable into the recess to engage the first battery terminal and the second battery terminal; and

a battery pack lock including a second actuator on the device housing operable to change the battery pack lock between a secured state and an unsecured state, wherein, when the battery pack lock is in the secured state, the portion of the battery pack housing is prevented from being removed from the recess.

2. The test and measurement device of claim 1, wherein the coupling mechanism of the battery pack includes a tab, and wherein the tab engages a second recess to releasably secure the battery pack to the device housing.

3. The test and measurement device of claim 2, wherein the first actuator is operable to disengage the tab from the recess.

4. The test and measurement device of claim 1, wherein the battery pack is a lithium-ion battery pack.

5. The test and measurement device of claim 4, wherein the battery pack is a 12V battery pack.

6. The test and measurement device of claim 1, wherein the battery pack housing is shaped and sized to match contours of the device housing.

7. The test and measurement device of claim 1, wherein the battery pack lock includes a first end, a second end, and a central portion connecting the first end to the second end.

8. The test and measurement device of claim 7, wherein the central portion conforms to contours of the device housing.

9. The test and measurement device of claim 1, wherein the battery pack lock includes a flange for mating with the battery pack.

10. The test and measurement device of claim 1, wherein the second actuator includes a screw having a cam.

11. The test and measurement device of claim 10, wherein the battery pack lock is configured to be changed from the unsecured state to the secured state by turning the screw.

12. The test and measurement device of claim 1, wherein the sense circuit includes a microprocessor.

13. The test and measurement device of claim 1, wherein the sense circuit is operable to sense a voltage.

14. A test and measurement device comprising:

a device housing including a recess;

a first battery terminal and a second battery terminal positioned substantially within the recess;

a removable battery pack including a battery pack housing and a coupling mechanism that engages the device housing to releasably secure the battery pack to the device housing, a portion of the battery pack housing being insertable into the recess to engage the first battery terminal and the second battery terminal;

a battery pack lock having a secured state, wherein, when the battery pack lock is in the secured state, the portion of the battery pack housing is prevented from being removed from the recess;

a first actuator supported on one of the device housing and the battery pack housing and operable to change the coupling mechanism between an engaged state, in which the coupling mechanism engages the device housing, and a disengaged state; and

a second actuator supported on the other of the device housing and the battery pack housing and operable to change the battery pack lock between the secured state and an unsecured state.

15. The test and measurement device of claim 14, wherein the battery pack lock includes a first end, a second end, and a central portion connecting the first end to the second end.

16. The test and measurement device of claim 15, wherein the central portion conforms to contours of the device housing.

17. The test and measurement device of claim 14, wherein the battery pack lock includes a flange for mating with the removable battery pack.

18. The test and measurement device of claim 14, wherein the second actuator includes a screw having a cam.

19. The test and measurement device of claim 18, wherein the battery pack lock is configured to be changed from an unsecured state to the secured state by turning the screw.

20. The test and measurement device of claim 14, further comprising a sense circuit, wherein the sense circuit is operable to sense a voltage.