# US 10,118,242 B2 · Welding power supply with power take-off shaft > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,242 B2 - Document ID: US10118242B2 - Status: Granted - Kind: B2 - Application number: 13/118,076 - Filed: 2011-05-27 - Published: 2011-12-22 - Granted: 2018-11-06 - Earliest claimed: 2010-06-17 - Assignees: Illinois Tool Works Inc. - Applicants: Scott Ryan Rozmarynowski; David L. Knoll - Inventors: Scott Ryan Rozmarynowski; David L. Knoll - Web page: https://patentgrep.com/patent/US10118242B2 ## CPC - B23K 9/1006: {Power supply} - B23K 9/32: Accessories - F02B 63/04: for electric generators - H02K 7/00: Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines - H02K 7/003: {Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28)} - Y10T 29/49002: Electrical device making - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A welding power supply having a power take-off shaft is provided. The welding power supply has an engine having an output shaft coupled a generator, where the engine shaft drives the generator to produce an electric current. The engine shaft further extends through the generator and is coupled to the power take-off shaft. One of a plurality of auxiliary attachments may be attached to the power-take off shaft and may be driven by the power-take off shaft. ## Claims ### Claim 1 A welding power supply, comprising: an engine having an output shaft; a generator coupled to the engine and driven by the output shaft to generate power for a welding application; and a power take-off shaft coupled to the generator on a side of the generator opposite the engine and driven by the output shaft, wherein the power take-off shaft is configured to drive one of a plurality of auxiliary attachments. ### Claim 2 (depends on 1) The welding power supply of claim 1, comprising a clutch configured to transfer torque from the output shaft to the power take-off shaft. ### Claim 3 (depends on 1) The welding power supply of claim 1, comprising a gear box configured to convert torque between the output shaft and the power-take off shaft. ### Claim 4 (depends on 1) The welding power supply of claim 1, comprising a coupling configured to engage the power take-off shaft with a power transfer connector of each of the plurality of auxiliary attachments, wherein the coupling comprises a housing configured to releasably secure the power take-off shaft to the power transfer connector of each of the plurality of auxiliary attachments. ### Claim 5 (depends on 1) The welding power supply of claim 1, comprising control circuitry configured to apply control signals to the engine to regulate rotational speed of the output shaft. ### Claim 6 (depends on 2) The welding power supply of claim 2, comprising control circuitry configured to apply control signals to the clutch based upon the attachment of each of the plurality of auxiliary attachments. ### Claim 7 (depends on 1) The welding power supply of claim 1, comprising control circuitry configured to allow for user selection of an auxiliary attachment from the plurality of auxiliary attachments. ### Claim 8 (depends on 7) The welding power supply of claim 7, comprising a user interface coupled to the control circuitry and configured to allow for user selection of an auxiliary attachment from the plurality of auxiliary attachments. ### Claim 9 (depends on 4) The welding power supply of claim 4, wherein the coupling comprises a male spline component coupled to the power take-off shaft and a female spline component coupled to the power transfer connector of each of the plurality of auxiliary attachments, wherein the male spline component and the female spline component are configured to engage with one another. ### Claim 10 (depends on 4) The welding power supply of claim 4, wherein the housing is configured to at least partially enclose the coupling when the power take-off shaft and the power transfer connector are engaged with one another. ### Claim 11 A welding power supply, comprising: an engine having an engine shaft; a generator coupled to the engine shaft and driven by the engine shaft to produce power for a welding application; a power take-off shaft disposed on a side of the generator opposite the engine, wherein the power take-off shaft is coupled to the engine shaft and driven by the engine shaft to drive an auxiliary attachment; and a clutch coupled to the power take-off shaft and the engine shaft and configured to engage and disengage the engine shaft with the power take-off shaft and transfer torque from the engine shaft to the power take-off shaft. ### Claim 12 (depends on 11) The welding power supply of claim 11, comprising a gear box coupled to the power take-off shaft and configured to convert the torque transferred to the power take-off shaft from the engine shaft. ### Claim 13 (depends on 11) The welding power supply of claim 11, comprising control circuitry configured to apply control signals to the clutch based upon the attachment of the auxiliary attachment to the welding power supply. ### Claim 14 (depends on 13) The welding power supply of claim 13, comprising a user interface coupled to the control circuitry and configured to allow for user selection of the auxiliary attachment from a plurality of auxiliary attachments. ### Claim 15 (depends on 11) The welding power supply of claim 11, wherein the clutch comprises a slipping clutch configured allow the engine shaft and the power take-off shaft to rotate at different speeds relative to one another. ### Claim 16 (depends on 11) The welding power supply of claim 11, comprising a coupling configured to releasably secure the auxiliary attachment to the welding power supply and configured to engage the power take-off shaft with a power transfer connector of the auxiliary attachment. ### Claim 17 (depends on 16) The welding power supply of claim 16, wherein the coupling comprises a housing at least partially disposed about the power take-off shaft and the power transfer connector.