# US 10,166,610 B2 · Compensation chuck for centrically clamping workpieces > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,166,610 B2 - Document ID: US10166610B2 - Status: Granted - Kind: B2 - Application number: 15/551,358 - Filed: 2016-02-18 - Published: 2018-02-01 - Granted: 2019-01-01 - Earliest claimed: 2015-03-12 - Assignees: HVM Technology GmbH - Applicants: Volker Henke - Inventors: Volker Henke - Web page: https://patentgrep.com/patent/US10166610B2 ## CPC - B23B 31/16233: {Jaws movement actuated by oblique surfaces of a coaxial control rod} - B23B 2231/22: Compensating chucks, i.e. with means for the compensation of irregularities of form or position - B23B 2231/30: Chucks with four jaws - Y10T 279/1953: Toggle actuated - Y10T 279/1973: Wedge actuated - Y10T 279/25: Compensation for eccentricity - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A compensation chuck for centrically clamping workpieces includes a housing, two pairs of mutually diametrally opposite base jaws for receiving corresponding clamping jaws, and a drive unit which is moveable preferably by power clamping having two pairs of drivable entrainment members. Two adjacent entrainment members are respectively coupled together by a first rocker and two further adjacent entrainment members are coupled together by a second rocker. There is also provided a coupling ring which guides a first entrainment member and a diametrally opposite second entrainment member in the peripheral direction tangentially relative to the clamping axis, such that a motion play is provided between the entrainment members and the coupling ring in the radial direction. ## Claims ### Claim 1 A compensation chuck for centrically clamping workpieces comprising: a housing, two pairs of mutually diametrally opposite base jaws for receiving corresponding clamping jaws, a drive unit which is moveable by power clamping having two pairs of drivable entrainment members, wherein two adjacent entrainment members are respectively coupled together by a first rocker and two further adjacent entrainment members are coupled together by a second rocker, and a coupling ring which guides a first entrainment member and a diametrally opposite second entrainment member in the peripheral direction tangentially relative to a clamping axis (A), wherein a motion play is provided between the entrainment members and the coupling ring in the radial direction. ### Claim 2 (depends on 1) The compensation chuck as set forth in claim 1, wherein the coupling ring is arranged in the housing rotatably about the clamping axis (A). ### Claim 3 (depends on 1) The compensation chuck as set forth in claim 1, wherein the coupling ring has a first radially oriented arm engaging into an opening in the first entrainment member and a second radially oriented arm engaging into an opening in the second entrainment member. ### Claim 4 (depends on 1) The compensation chuck as set forth in claim 1, wherein the coupling ring has an at least substantially central through opening. ### Claim 5 (depends on 1) The compensation chuck as set forth in claim 1, wherein the first rocker and the second rocker are arranged rotatably on a respective slider. ### Claim 6 (depends on 5) The compensation chuck as set forth in claim 5, wherein the sliders are coupled to a piston and are moveable synchronously, in particular radially, towards and away from each other. ### Claim 7 (depends on 1) The compensation chuck as set forth in claim 1, wherein the first and second rockers are respectively pivotable about an axis of rotation parallel to the clamping axis (A). ### Claim 8 (depends on 1) The compensation chuck as set forth in claim 1, wherein the entrainment members are respectively guided to be linearly moveable in the housing. ### Claim 9 (depends on 8) The compensation chuck as set forth in claim 8, wherein respective mutually diametrally opposite entrainment members are guided parallel to each other. ### Claim 10 (depends on 9) The compensation chuck as set forth in claim 9, wherein respective adjacently arranged entrainment members are guided at a right angle to each other. ### Claim 11 (depends on 1) The compensation chuck as set forth in claim 1, wherein the entrainment members are respectively coupled to the first and second rockers respective rotors mounted rotatably on the first and second rockers rocker. ### Claim 12 (depends on 11) The compensation chuck as set forth in claim 11, wherein the respective rotor and the entrainment member associated therewith are linearly guidedly moveable relative to each other. ### Claim 13 (depends on 12) The compensation chuck as set forth in claim 12, wherein the respective rotor and the entrainment member associated therewith are displaceable relative to each other at a right angle to a direction of guidance of the entrainment member in the housing. ### Claim 14 (depends on 1) The compensation chuck as set forth in claim or claim 1, wherein the first entrainment member has a first radially oriented arm engaging into a first opening in the coupling ring and wherein the second entrainment member has a radially oriented arm engaging into a second opening in the coupling ring.