# US 2011/0214267 A1 · Tool device and machine tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2011/0214267 A1 - Document ID: US20110214267A1 - Status: Published application - Kind: A1 - Application number: 13/050,193 - Filed: 2011-03-17 - Published: 2011-09-08 - Earliest claimed: 2008-09-18 - Assignees: MAG IAS GmbH - Inventors: Martin Schmid - Web page: https://patentgrep.com/patent/US20110214267A1 ## CPC - B23Q 5/266: {with means to control the feed rate by controlling the fluid flow} - B23B 5/06: for turning valves or valve bodies {(turning conical surfaces in general B23B5/38; tools for working valve seats B23B51/106)} - B23D 77/14: Reamers for special use, e.g. for working cylinder ridges - B23Q 5/26: Fluid-pressure drives - Y10T 29/5176: including machining means - Y10T 29/5178: Attachment - Y10T 408/6757: Fluid means - B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A tool device for a machine tool is provided comprising at least one interface for fluid, at least one piston device having a first piston face in fluid connection with the at least one interface for fluid and a second piston face opposite the first piston face, a return motion device which acts upon the first piston face, and a workpiece machining device coupled to the at least one piston device, wherein the at least one piston device is movable and positionable by force-biasing via the fluid. ## Claims ### Claim 1 Tool device for a machine tool, comprising: at least one interface for fluid; at least one piston device having a first piston face in fluid connection with the at least one interface for fluid and a second piston face opposite the first piston face; a return motion device which acts upon the first piston face; and a workpiece machining device coupled to the at least one piston device; wherein the at least one piston device is movable and positionable by force-biasing via the fluid. ### Claim 2 (depends on 1) Tool device in accordance with claim 1, wherein the workpiece machining device comprises a tool region for turning, reaming, drilling/boring, parting, facing or threading. ### Claim 3 (depends on 1) Tool device in accordance with claim 1, wherein the piston device is linearly movable. ### Claim 4 (depends on 1) Tool device in accordance with claim 1, wherein a movement axis of a linear motion capability of the at least one piston device is parallel to or coaxial with an axis of rotation of the tool device as a whole. ### Claim 5 (depends on 1) Tool device in accordance with claim 1, wherein at least one of the first piston face and the second piston face is oriented transversely to a movement axis of a linear motion capability of the at least one piston device. ### Claim 6 (depends on 1) Tool device in accordance with claim 1, wherein at least one of the movement and positioning of the at least one piston device is fluid-controlled. ### Claim 7 (depends on 1) Tool device in accordance with claim 1, wherein the at least one interface for fluid is an interface for coolant, lubricant, or compressed air. ### Claim 8 (depends on 1) Tool device in accordance with claim 1, wherein fluid provided via the at least one interface for fluid exerts a pressure force for moving and positioning the at least one piston device and the return motion device provides a force counteracting this force. ### Claim 9 (depends on 1) Tool device in accordance with claim 1, wherein the workpiece machining device is movable by the at least one piston device. ### Claim 10 (depends on 1) Tool device in accordance with claim 1, wherein the workpiece machining device is movable into engagement by the at least one piston device. ### Claim 11 (depends on 1) Tool device in accordance with claim 1, wherein the workpiece machining device is held by the at least one piston device. ### Claim 12 (depends on 1) Tool device in accordance with claim 1, wherein the workpiece machining device is movable, by action of the at least one piston device, in a linear movement direction which is at an acute angle to a linear movement direction of the at least one piston device. ### Claim 13 (depends on 12) Tool device in accordance with claim 12, wherein the workpiece machining device is held or formed on a guide device whose movement and positioning are controlled by the at least one piston device. ### Claim 14 (depends on 13) Tool device in accordance with claim 13, wherein the guide device has a return motion device. ### Claim 15 (depends on 13) Tool device in accordance with claim 13, wherein the at least one piston device has a first ramp face and the guide device has a second ramp face, wherein the first ramp face acts upon the second ramp face and the first ramp face and the second ramp face are oriented at an acute angle relative to a linear movement direction of the at least one piston device. ### Claim 16 (depends on 1) Tool device in accordance with claim 1, wherein the return motion device comprises one or more springs. ### Claim 17 (depends on 1) Tool device in accordance with claim 1, comprising a first piston device which is in fluid connection with a first interface for fluid and to which a first workpiece machining device is coupled, and a second piston device which is in fluid connection with a second interface for fluid and to which a second workpiece machining device is coupled. ### Claim 18 (depends on 17) Tool device in accordance with claim 17, wherein the second piston device surrounds the first piston device. ### Claim 19 (depends on 17) Tool device in accordance with claim 17, wherein the first workpiece machining device is configured for machining a valve guide. ### Claim 20 (depends on 17) Tool device in accordance with claim 17, wherein the second workpiece machining device is configured for machining a valve seat. ### Claim 21 Machine tool, comprising: at least one tool carrier which comprises at least one interface for fluid and on which a tool device is held; wherein the at least one interface for fluid of the at least one tool carrier is in fluid connection with the at least one interface for fluid of the tool device; and wherein the tool device comprises: at least one interface for fluid; at least one piston device having a first piston face in fluid connection with the at least one interface for fluid and a second piston face opposite the first piston face; a return motion device which acts upon the first piston face; and a workpiece machining device coupled to the at least one piston device; wherein the at least one piston device is movable and positionable by force-biasing via the fluid. ### Claim 22 (depends on 21) Machine tool in accordance with claim 21, wherein the at least one interface for fluid of the at least one tool carrier is an interface for coolant, lubricant or compressed air. ### Claim 23 (depends on 21) Machine tool in accordance with claim 21, wherein the at least one tool carrier is configured as a tool spindle on which a fixed tool device is rotatable about an axis of rotation. ### Claim 24 (depends on 21) Machine tool in accordance with claim 21, wherein the at least one tool carrier is linearly movable in at least one direction relative to a workpiece carrier.