WELTEC AS Patent applications |
Patent application number | Title | Published |
20100276398 | SHIELDING GAS FLOW CONTROLLER FOR A WELDING APPARATUS - A shielding gas (SG) flow controller for an arc welder includes SG input/output with a controllable valve therebetween, and having a control input, and a controller having a first input receiving a welding signal representing arc current and a gas flow setting controller generating a flow setting output based on the welding signal, representing a desired SG flow. Input and output pressure sensors provide SG input and out pressure to second and third controller inputs, respectively. A flow setting output modifier modifies the flow setting output of the gas flow setting controller based on the SG input/output pressure, the welding signal, and a characteristic of the controllable valve into a control signal input to the control input of the controllable gas valve to maintain a substantially constant SG flow corresponding to the flow setting output substantially independent of actual SG input/output pressures. | 11-04-2010 |
20100176092 | ARRANGEMENT AND METHOD FOR BLANKET GAS SUPPLY CONTROL FOR AN ELECTRICAL WELDING APPARATUS - Apparatus and method for controlling blanket gas flow in an electrical welding facility, wherein welding is performed using a welding electrode in electrical connection with a welding machine unit. The apparatus includes an electric measuring device having a current sensor for determining the magnitude of an electrical welding current carried in a circuit incorporating the welding electrode and having a current sensor output adapted to provide a I signal indicating the current magnitude, and a voltage sensor for determining the magnitude of electrical voltage applied to the welding electrode and having a voltage sensor output for providing a U signal indicating the voltage magnitude, and a control device having inputs connected to the current sensor output and the voltage sensor output, respectively, and a control signal output for providing a control signal to a blanket gas flow controller. | 07-15-2010 |
20100101802 | Drilling Head for Reboring a Stuck Valve - The present invention relates to a drilling head for reboring a stuck valve or drilling into the formation downhole. The invention furthermore relates to a drilling tool comprising the drilling head and a driving unit. The drilling head comprises a hole saw beside a drill bit for cutting out a piece from the stuck valve. Furthermore, the invention relates to a drilling system comprising the drilling tool and a driving tool for moving the drilling tool downhole, a method of drilling; and a use of the drilling head. | 04-29-2010 |