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US 6,888,091 B1Granted
Automatic plasma Arc tube cutter/welder
AssigneeKrause Morgan
InventorsJoseph Donald Krause, Jessie Morgan
Life of this patent
Estimating the term…
Abstract
A device for allowing a rotating plasma arc to perform cutting or welding operations inside tubes with small inside diameters by being attached to existing plasma arc power sources where in the speed and axis of rotation of the arc are controlled by the device, and the components of the device in proximity to the plasma arc itself are protected by the ceramic composition of the device and an inert gas shield.
Claims1
An automatic plasma arc tube cutter/welder which comprises
- (a) a flexible metal cable (wand) having an insulated outer jacket and an inner gas passage, manufactured in lengths according to the desired axis of rotation of the plasma arc;
- and
- (b) a stop collar secured to the cable (wand) for more accurate adjustment of the axis of rotation of the plasma arc;
- and
- (c) a threaded metal bushing attaching the cable (wand) to a round ceramic head, and providing an electrical connection to a tungsten electrode which arcs from its circumference through an orifice in the ceramic head, and providing a seal for the passage of gas and/or metal powder;
- and
- (d) a compression fitting securing the cable (wand) to a rotating housing;
- and
- (e) a swivel connection securing the rotating housing to a stationary power and gas lead;
- and
- (f) a rotating housing enclosing the swivel connection;
- and
- (g) a gear set connecting the rotating housing to a stationary housing;
- and
- (h) A stationary housing enclosing power and gas leads, switch leads, motor power leads, with an attached junction box enclosing an electric motor attached to the gear set in which the speed is controlled by a rheostat and a double pole momentary contact switch, which also starts the arc.
12 more elements
Dependencies are inferred from the claim text.