초록 ▼

A holder for a consumable electrode used to cut metal by means of an electric arc is disclosed. The holder has an elongated barrel for containing the electrode and a pistol grip depending from the barrel for supplying electrical energy to the electrode. The exposed length of the electrode can be adj

A holder for a consumable electrode used to cut metal by means of an electric arc is disclosed. The holder has an elongated barrel for containing the electrode and a pistol grip depending from the barrel for supplying electrical energy to the electrode. The exposed length of the electrode can be adjusted by a ram which slides in the barrel behind the electrode and which cooperates with clamping means actuated by a trigger on the pistol grip to secure the electrode at any adjusted length. Compressed air and electrical energy are supplied to the base of the pistol grip and are respectively communicated to a nozzle at the front end of the barrel and to the electrode. The nozzle is mounted for rotation relative to the electrode and has orifices for ejecting the air along any desired side of the electrode. Manifold means in the nozzle insures a continuous supply of compressed air to the orifices irrespective of the angular position of the nozzle. A metallic heat shield protects the nozzle from radiation, and a shield depends from the barrel in front of the pistol grip to protect a workman\s fingers from excessive radiation. The inside of the head is designed to maximize the flow of compressed air through the orifices.

대표청구항 ▼

In a hand-held tool for use in working metal by means of an electric arc; said tool including barrel means adapted to contain an elongated electrode; pistol grip means depending from said barrel; means actuated by a trigger carried by said pistol grip for releasably clamping said electrode in said b

In a hand-held tool for use in working metal by means of an electric arc; said tool including barrel means adapted to contain an elongated electrode; pistol grip means depending from said barrel; means actuated by a trigger carried by said pistol grip for releasably clamping said electrode in said barrel means with an exposed length of the electrode extending axially forward beyond the front end of said barrel means; means in said pistol grip for supplying electrical energy to said electrode in said barrel means; and rotary nozzle means located at the front of said barrel means for flowing a gaseous medium along the exposed length of the electrode; said nozzle means including a head having orifice means for ejecting said gaseous medium therefrom, means mounting said head to the front of said barrel means for rotation coaxial therewith, means for supplying said gaseous medium under pressure to said head, and annular manifold means located intermediate said supply means and said orifice means to provide gas communication between said supply means and said orifices; the improvement wherein said head has a front wall with an electrode receiving aperture and a tubular wall extending rearwardly from said front wall and surrounding at least a portion of said barrel means, means providing an outer seal compressible radially between said tubular wall and said barrel means to prevent escape of said gaseous medium rearwardly from said manifold means, and means providing an inner seal compressible axially between the front wall of said head and said head mounting means to prevent escape of said gaseous medium inwardly from said manifold means.