[특허]Portable welder with integral battery charger

Portable welder with integral battery charger 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B23K-009/10
출원번호	US-0603259 (2003-06-26)
발명자 / 주소	Stava, Elliott K. Matthews, William T.
출원인 / 주소	Lincoln Global, Inc.
대리인 / 주소	Fay, Sharpe, Fagan, Minnich & McKee, LLP
인용정보	피인용 횟수 : 40 인용 특허 : 0

초록 ▼

A portable electric arc welder having a power source creating a DC voltage between two output terminals to drive a welding device and an integrated, internal battery charger with an input stage and an output connectable to a battery to be charged, and a selectable switch having a first position conn

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1. In a portable electric arc welder having a power source creating a DC voltage between two output terminals, said welding having a weight of less than 100 pounds and a rating of less than 300 amperes, a voltage feedback circuit to control the voltage between said terminals by a reference voltage signal, and welding output leads for performing a welding operation, the improvement comprising: a battery charger integrated with said welder and connected to said terminals, said battery charger having output leads connectable to a battery having an output voltage of at least about 12 volts DC, said battery charger further having a charging sequence circuit operable by an input enable signal and controlled by conditions of said battery being charged to generate a voltage and/or a current to charge said battery; and, a manual selector switching on said welder and movable between a first position connecting said terminals to said welding output leads and a second position creating said battery charger input enable signal. 2. The improvement as defined in claim 1 wherein said power source is a constant voltage source. 3. An improvement as defined in claim 2 wherein a welding gun with a weld trigger is connected to one of said welding output leads and a circuit for operating said power source when both said trigger is closed and said selector switch is in said first position. 4. The improvement as defined in claim 2 wherein said welder has a wire feeder operable when said selector switch is in said first position. 5. An improvement as defined in claim 1 wherein a welding gun with a weld trigger is connected to one of said welding output leads and a circuit for operating said power source when both said trigger is closed and said selector switch is in said first position. 6. The improvement as defined in claim 1 wherein said welder has a wire feeder operable when said selector switch is in said first position. 7. A portable electric arc welder having a power source creating a DC voltage between two output terminals to drive a welding device and an integrated, internal battery charger with an input stage and an output stage connectable to a battery to be charged, and a selectable switch having a first position connecting said terminals to said welding device and a second position connecting said terminals to said integrated battery charger at a selected location. 8. A portable electric arc welder as defined in claim 7 wherein said power source is a constant voltage source. 9. A portable welder as defined in claim 8 including a spark inhibitor comprising a resistor in one of said output leads with an impedance of at least about 0.3 meg ohms and connected in parallel with a shunt switch, a current sensor for said lead and a circuit to close said shunt switch when said current sensor senses a current below a given value, said value substantially greater than the rated current of said power source but less than twice the rated current of said power source. 10. A portable electric arc welder as defined in claim 7 wherein said selectable switch has a third position, an integral device for actuating a starter motor, said actuating device connected to at least one of said output terminals by a connector and a circuit to close said connector when said selector switch is in said third position to operate said starter motor of an internal combustion engine. 11. A portable welder as defined in claim 10 wherein said power source has a rating of less than 300 amperes. 12. A portable welder as defined in claim 7 wherein said power source has a rating of less than 300 amperes. 13. A portable welder as defined in claim 7 including a spark inhibitor comprising a resistor in one of said output leads with an impedance of at least about 0.3 meg ohms and connected in parallel with a shunt switch, a current sensor for said lead and a circuit to close said shunt switch when said current sensor senses a current below a given value, said value substantially grea ter than the rated current of said power source but less than twice the rated current of said power source.

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