# US 2014/0235074 A1 · Sliding contact arrangement for an erosion arrangement and method for producing a sliding contact arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0235074 A1 - Document ID: US20140235074A1 - Status: Published application - Kind: A1 - Application number: 14/347,813 - Filed: 2012-09-25 - Published: 2014-08-21 - Earliest claimed: 2011-09-27 - Assignees: Walter Maschinenbau GmbH - Applicants: Walter Maschinenbau GMBH - Inventors: Bernhard Pichler - Web page: https://patentgrep.com/patent/US20140235074A1 ## CPC - H01R 39/08: Slip-rings - H01R 13/025: {formed by the conductors of a cable end} - H01R 39/24: Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres - H01R 39/56: Devices for lubricating or polishing slip-rings or commutators during operation of the collector - H01R 43/12: Manufacture of brushes - H01R 43/24: Assembling by moulding on contact members - Y10T 29/49117: Conductor or circuit manufacturing - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A sliding contact arrangement (13) is used in an erosion arrangement (10) or an erosion machine. The sliding contact arrangement (13) establishes an electrical connection with a slip ring (14), whereby said slip ring can be driven about a rotational axis (D), and with a current source or voltage source (11). The sliding contact arrangement (13) has an electrical connecting line (12) that can be electrically connected to the current source or voltage source (11). The connecting line (12) is mechanically and electrically connected to an electrically conductive body (20). On an underside (21) associated with the slip ring (14), the body (20) includes a plurality of projecting contact wires (35) bundled into several strands. In not loaded, not bent state, the strands (37) extend parallel to each other away from the underside (21) toward their free ends (39), which contact a common generated surface of a cylinder. ## Claims ### Claim 1 A sliding contact arrangement (13) apparatus for an erosion arrangement (10) for establishing an electrical connection with the use of a drivable slip ring (14), the apparatus comprising: an electrically conductive body (20), an electrical connecting line (12) that is electrically connected to the body (20), and a plurality of electrically conductive contact wires (35) that are electrically and mechanically connected to the body (20) and extend from an underside (21) of the body (20) associated with the slip ring (14), respectively toward their individual free ends (36). ### Claim 2 (depends on 1) The sliding contact arrangement (13) apparatus as in claim 1, wherein a free length of the contact wires (35) from the underside (21) of the body (20) to their respective free ends (36) is between 2 and 9 millimeters. ### Claim 3 (depends on 1) The sliding contact arrangement (13) apparatus as in claim 1, wherein the contact wires (35) form several wire strands (37), said wire strands extending from the underside (21) of the body (20). ### Claim 4 (depends on 2) The sliding contact arrangement (13) apparatus as in claim 2, wherein the distance between adjacent wire strands (37) is smaller than the free length of the contact wires (35). ### Claim 5 (depends on 3) The sliding contact arrangement (13) apparatus as in claim 3, wherein individual ones of the wire strands (37) are fastened in a individual recesses (38) of the body (20), and wherein the recesses (38) are arranged so as to be in parallel alignment with each other. ### Claim 6 (depends on 5) The sliding contact arrangement (13) apparatus as in claim 5, wherein the wire strands (37) are mechanically and electrically connected by material-bonded connection to the body (20) in the recesses (38). ### Claim 7 (depends on 1) The sliding contact arrangement (13) apparatus as in claim 1, wherein the underside (21) of the body (20) forms a concavely arched surface (22). ### Claim 8 An apparatus for erosion arrangement (10), the apparatus comprising: a voltage or current source (11), an electrical connecting line (12) that electrically connects the voltage or current source (11) to an electrically conductive body (20), a holder (16) in which the body (20) is held at a radial distance from a spindle (15) that can be driven about a rotational axis (D), an electrically conductive slip ring (14) arranged on the spindle (15), said slip ring being electrically connected to a tool receptacle provided on the spindle (15), said tool receptacle being disposed for mounting an erosion tool, and a plurality of electrically conductive contact wires (35) that are electrically and mechanically connected to the body (20) and extend from an underside (21) of the body (20) associated with the slip ring (14), respectively toward their individual free ends (36), such that at least a part of individual ones of the contact wires (35) are in abutment with the slip ring (14). ### Claim 9 Method for producing the sliding contact arrangement (13), the method comprising: electrically and mechanically connecting wire strands (37), individual ones of which include several electrically conductive contact wires (35), to an electrically conductive body (20) in such a manner that the wire strands (37) extend from an underside (21) of the body (20), respectively toward their individual free ends (39), electrically and mechanically connecting an electrical connecting line (12) to the body (20). ### Claim 10 (depends on 9) Method as in claim 9, further comprising inserting the wire strands (37) and/or the connecting line (12) into one recess (34, 38), respectively, on the body (20) and connecting the wire strands (37) and/or the connecting line (12) to the body (20) in a material-bonded manner. ### Claim 11 (depends on 9) Method as in claim 9, further comprising placing the wire strands (37) and/or the connecting line (12) in a casting mold and producing the body (20) as a cast component.