Cordless power tool system

• US 6,515,451 B2
• Filed: 09/26/2001
• Issued: 02/04/2003
• Est. Priority Date: 08/13/1998
• Status: Expired due to Fees

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Woods, Samuel G., Walter, Richard T., White, Daniel J., Yahnker, Christopher R., Bodine, Thomas J., Ayala, Adan, Brotto, Daniele C., Buck, John E., Watson, James B., Puzio, Daniel, Bradus, Robert, White, Paul S., Harrison, Edward A.
• Primary Examiner(s): Tso, Edward H.
• Assistant Examiner(s): LUK, LAWRENCE W
• Application Number:
  US09/963,809
• Publication Number:
  US 20020011819A1
• Time in Patent Office: 496 Days
• Field of Search: 320/117, 320/114, 320/113, 320/112, 320/116, 320/107, 307/64, 307/66, 307/80
• US Class Current: 320/117
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• CPC Class Codes: B27B 9/02 Arrangements for adjusting the cutting depth or the amount of tilting
• 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: H01M 50/244 Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
• CPC Class Codes: H01M 50/247 specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
• CPC Class Codes: H01M 50/264 for cells or batteries, e.g. straps, tie rods or peripheral frames
• CPC Class Codes: H01M 50/296 characterised by terminals of battery packs terminals of batteries H01M50/543
• CPC Class Codes: H01R 13/64 Means for preventing incorrect coupling
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A system of cordless power tools includes a cordless power tool adapted to removably receive a rechargeable battery pack. The system further includes a battery pack charger and a converter for converting AC electricity to DC electricity. A battery pack interface block is captured between clam shell halves of a battery pack housing and includes a plurality of male blade terminals. The male blade terminals are received within recessed female terminals of a tool terminal block and similarly received by recessed female terminals of the charger. The tool terminal block further includes a pair of male terminals which engage recessed female terminals of the converter.

Claims

1. A system of power tools comprising:

a power tool having a tool housing defining a pair of laterally spaced engagement portions, the power tool further including a first terminal block having a plurality of terminals; and

a power source removably attachable to the power tool, the power source including a second terminal block having a plurality of terminals which are configured to interface with at least a portion of the terminals of the first terminal block, the power source further comprising a latching mechanism for engaging at least a portion of the laterally spaced engagement portions.

2. The system of power tools of claim 1, wherein the latching mechanism includes a moving arm that is configured to engage the tool housing.

3. The system of power tools of claim 2, wherein the power source is moved in a first direction as it is engaged to the tool and the moving arm of the latching mechanism is movable in a second direction that is normal to the first direction.

4. The system of power tools of claim 2, wherein the power source includes a housing having at least one guide rail formed therein, the at least one guide rail cooperating with an associated one of the laterally spaced engagement portions to secure the power source to the tool housing.

5. The system of power tools of claim 4, wherein the housing of the power source includes two guide rails and the laterally spaced engagement portions are formed on an exterior portion of the tool housing, the housing of the power source wrapping around the tool housing when the power source is engaged to the power tool.

6. The system of power tools of claim 1, wherein the latching mechanism is a rotary actuated latching mechanism.

7. The system of power tools of claim 6, wherein the latching mechanism includes a rotatable handle and at least one rail locking protrusion, the rail locking protrusion being movable in response to rotation of the handle, the rail locking protrusion being movable between a first position, wherein the rail locking protrusion is engaged to one of the laterally spaced engagement portions, and a second position, wherein the rail locking protrusion is disengaged from the laterally spaced engagement portions.

8. The system of power tools of claim 7, wherein the laterally spaced engagement portions are slots that are formed into the tool housing.

9. The system of power tools of claim 7, wherein the rail locking protrusion is coupled for rotation with the handle.

10. The system of power tools of claim 1, wherein the power source includes a housing and the latching mechanism includes a clip structure that is fixedly coupled to the housing, the clip structure being elastically deformable to engage and disengage the tool housing to thereby couple and uncouple, respectively, the power source from the power tool.

11. The system of power tools of claim 10, wherein the clip structure includes an arcuate portion for engaging the tool housing.

12. The system of power tools of claim 10, wherein the clip structure includes at least one free end, the free end being movable in a predetermined direction to bias the clip structure into a predetermined configuration that permits the power source to be engaged and disengaged from the tool housing.

13. The system of power tools of claim 1, wherein the power source is a battery pack.

14. The system of power tools of claim 1, wherein the power source includes an AC/DC converter.

15. The system of power tools of claim 1, wherein the power tool is selected from a group of power tools consisting of drills, circular saws and reciprocating saws.