Cordless welding machine and plasma cutter

Patent metadata

Field	Value
Publication number	US-9533367-B2
Application number	US-74210807-A
Country	US
Kind code	B2
Filing date	Apr 30, 2007
Priority date	May 4, 2006
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A cordless welding machine includes first and second batteries being connected in parallel, a ground clamp connected to the first and second batteries, and a first welding electrode connected to the first and second batteries. The batteries providing a current output of at least about 40 amps.

First claim

What is claimed is:

1. A welding machine comprising:
a housing;
first and second batteries disposed in the housing and being connected in parallel, the first and second batteries being power tool batteries that are electrically connectable and physically attachable to a power tool;
a ground clamp connected to the first and second batteries; and
a welding gun including a first welding electrode connected to the first and second batteries;
the batteries providing a current output of at least 40 amps;
wherein the welding machine, excluding the ground clamp and any cables connecting to the first welding electrode in the welding gun, weighs less than 30 pounds and has a current-to-weight ratio between about 3.17 amps/pound and about 10 amps/pound.

2. The welding machine of claim 1 , further comprising a charger for charging at least one of the first and second batteries.

3. The welding machine of claim 2 , further comprising a cord for connecting the charger to an AC source.

4. The welding machine of claim 3 , wherein the cord is at least a hundred feet long.

5. The welding machine of claim 3 , wherein the cord has a gauge rating of at least 18 AWG.

6. The welding machine of claim 1 , further comprising a discharge control circuit for controlling the discharge of the at least one of the first and second batteries.

7. The welding machine of claim 6 , wherein the discharge control circuit is disposed within the at least one of the first and second batteries.

8. The welding machine of claim 1 , further comprising a housing for supporting the first and second batteries.

9. The welding machine of claim 8 , wherein the housing has wheels.

10. The welding machine of claim 8 , herein the housing has at least one shoulder strap.

11. The welding machine of claim 1 , wherein a first diode is disposed between the welding gun and the first battery, and a second diode is disposed between the welding gun and the second battery.

12. A welding machine comprising:
a housing;
first and second batteries disposed in the housing and being connected in parallel, the first and second batteries being power tool batteries that are electrically connectable and physically attachable to a power tool;
a ground clamp connected to the first and second batteries;
a welding gun including a first welding electrode connected to the first and second batteries;
a first diode disposed between the first welding electrode in the welding gun and the first battery; and
a second diode is disposed between the first welding electrode in the welding gun and the second battery;
wherein the welding machine, excluding the ground clamp and any cables connecting to the first welding electrode in the welding gun, weighs less than 30 pounds and has a current-to-weight ratio between about 3.17 amps/pound and about 10 amps/pound.

13. The welding machine of claim 12 , further comprising a charger for charging at least one of the first and second batteries.

14. The welding machine of claim 13 , further comprising a cord for connecting the charger to an AC source.

15. The welding machine of claim 14 , wherein the cord is at least a hundred feet long.

16. The welding machine of claim 14 , wherein the cord has a gauge rating of at least 18 AWG.

17. The welding machine of claim 12 , further comprising a discharge control circuit for controlling the discharge of at least one of the first and second batteries.

18. The welding machine of claim 17 , wherein the discharge control circuit is disposed within the at least one of the first and second batteries.

19. A welding machine comprising:
a housing;
first and second batteries disposed in the housing and being connected in parallel, the first and second batteries being power tool batteries that are electrically connectable and physically attachable to a power tool;
a ground clamp connected to the first and second batteries;
a welding gun including a first welding electrode connected to the first and second batteries; and
a charger for charging at least one of the first and second batteries; and
a first diode disposed between the first welding electrode of the welding gun and the first battery, and a second diode is disposed between the first welding electrode of the welding gun and the second battery,
wherein the welding machine, excluding the ground clamp and any cables connecting to the first welding electrode of the welding gun, weighs less than 30 pounds and has a current-to-weight ratio between about 3.17 amps/pound and about 10 amps/pound.

20. The welding machine of claim 19 , further comprising a cord for connecting the charger to an AC source.

21. The welding machine of claim 20 , wherein the cord is at least a hundred feet long.

22. The welding machine of claim 20 , wherein the cord has a gauge rating of at least 18 AWG.

23. The welding machine of claim 19 , further comprising a discharge control circuit for controlling the discharge of at least one of the first and second batteries.

24. The welding machine of claim 23 , wherein the discharge control circuit is disposed within the at least one of the first and second batteries.

25. A welding machine comprising:
a housing;
first and second batteries disposed in the housing and being connected in parallel, the first and second batteries being power tool batteries that are electrically connectable and physically attachable to a power tool;
a ground clamp connected to the first and second batteries; and
a welding gun including a first welding electrode connected to the first and second batteries;
wherein the welding machine, excluding the ground clamp and any cables connecting to the first welding electrode of the welding gun, weighs less than 30 pounds and has a current-to-weight ratio between about 3.17 amps/pound and about 10 amps/pound.

26. The welding machine of claim 25 , wherein a first diode is disposed between the first welding electrode of the welding gun and the first battery, and a second diode is disposed between the first welding electrode of the welding gun and the second battery.

27. The welding machine of claim 25 , further comprising a discharge control circuit for controlling the discharge of at least one of the first and second batteries.

28. The welding machine of claim 27 , wherein the discharge control circuit is disposed within the at least one of the first and second batteries.

29. The welding machine of claim 25 , further comprising a charger for charging at least one of the first and second batteries.

30. The welding machine of claim 29 , further comprising a cord for connecting the charger to an AC source.

31. The welding machine of claim 30 , wherein the cord is at least a hundred feet long.

32. The welding machine of claim 30 , wherein the cord has a gauge rating of at least 18 AWG.

33. A cordless plasma cutter comprising:
a first battery connectable and physically attachable to a separate power tool;
an arc generator circuit connected to the first battery;
a ground clamp connected to the first battery and to a workpiece;
a first electrode connected to the first battery; and
a second electrode connected to the arc generator circuit;

wherein the first and second electrodes create a cutting arc directed to the workpiece.

34.

Assignees

• Carrier David A
• Howard Geoffrey S
• Starks Shelby K
• Goldman David A
• Black & Decker Inc

Inventors

• Carrier David A
• Howard Geoffrey S
• Starks Shelby K
• Goldman David A

Classifications

• B23K9/1081

  Arc welding by means of accumulated energy · CPC title

• Y10T29/53135

  Storage cell or battery · CPC title

• B23K10/003

  Scarfing, desurfacing or deburring · CPC title

• B23K9/10 Primary

  Other electric circuits therefor; Protective circuits; Remote controls · CPC title