# US 6,719,503 B1 · Tuned damped absorber support > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,719,503 B1 - Document ID: US6719503B1 - Status: Granted - Kind: B1 - Application number: 09/948,728 - Filed: 2001-09-07 - Granted: 2004-04-13 - Earliest claimed: 2001-09-07 - Assignees: Unova IP Corp. - Inventors: Paul E. McCalmont; Mark D. Kohring; Dennis A. Burt; Miles E. Loretta - Web page: https://patentgrep.com/patent/US6719503B1 ## CPC - B23Q 11/0035: {by adding or adjusting a mass, e.g. counterweights} - B23Q 11/0039: {by changing the natural frequency of the system or by continuously changing the frequency of the force which causes the vibration} - B23Q 17/0976: {Detection or control of chatter (B23Q15/12 takes precedence)} - F16F 7/104: the inertia member being resiliently mounted {(F16F7/1022 takes precedence)} - Y10T 409/304312: with means to dampen vibration - Y10T 409/309576: Machine frame - 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 - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract With high speed machine tools, there is a desire to dampen vibrations and to retain the damper mass in proper position. The present invention relates to a tuned damped absorber support providing simultaneous energy dissipation in both horizontal and vertical directions which also provides for proper mass position retention. The tuned damped absorber assembly is attached directly or indirectly to a machine component requiring damping. Both single damper mass and double damper mass configurations are shown. With a double damper mass, the system can be tuned to two different frequencies. Therefore, the double damper mass provides for optimization in both a vertical and a horizontal direction. ## Claims ### Claim 1 An attachment assembly for dissipating energy of a moving machining component in at least two directions of motion, comprising: at least one damper mass; at least one first preload assembly, each said first preload assembly having a first end coupled to said damper mass by a biasing element and a second end coupled to said machine component; at least one rod for mounting said at least one damper mass to the machine component and for applying a preload to said at least one first preload assembly; and, at least one first damping element. ### Claim 2 (depends on 1) The attachment assembly of claim 1, wherein: said at least one damper mass includes at least one preload bore therethrough; said at least one first preload assembly includes a cap screw having a cap end and a threaded end opposite said cap end; said at least one first preload assembly includes a retainer for coupling said biasing element to said cap end of said cap screw; and wherein said cap end of said cap screw is coupled to said damper mass by said biasing element, and said threaded end extends at least partway through said at least one preload bore and is coupled to said machine component. ### Claim 3 (depends on 1) The attachment assembly of claim 1, wherein said attachment assembly attenuates vibration of said machine component. ### Claim 4 (depends on 1) The attachment assembly of claim 1, wherein said at least two directions of motion includes a first direction along a horizontal axis and a second direction along a vertical axis. ### Claim 5 (depends on 1) The attachment assembly of claim 1, wherein said biasing element is a spring. ### Claim 6 (depends on 1) The attachment assembly of claim 1, wherein said at least one first damping element is constructed from a viscoelastic material. ### Claim 7 (depends on 1) The attachment assembly of claim 1, wherein said at least one damper mass is mounted to said machine component by a mounting plate. ### Claim 8 (depends on 1) The attachment assembly of claim 1, wherein said at least one first damping element is positioned between said at least one damper mass and said machine component. ### Claim 9 (depends on 1) The attachment assembly of claim 1, wherein said at least one rod includes a symmetric cross-section. ### Claim 10 (depends on 1) The attachment assembly of claim 1, wherein said at least one rod includes a first stiffness oriented along a first axis and a second stiffness oriented along a second axis. ### Claim 11 (depends on 10) The attachment assembly of claim 10, wherein said at least one rod includes a non-symmetric cross-section. ### Claim 12 (depends on 1) The attachment assembly of claim 1, wherein said at least one damper mass includes a first damper mass and a second damper mass. ### Claim 13 (depends on 12) The attachment assembly of claim 12, wherein said first damper mass is affixed to said second damper mass by at least one flexure plate. ### Claim 14 (depends on 12) The attachment assembly of claim 12, further comprising at least one second preload assembly, each of said at least one second preload assembly having a first end coupled to said first damper mass by a biasing element and a second end coupled to said second damper mass. ### Claim 15 (depends on 12) The attachment assembly of claim 12, further comprising at least one second damping element. ### Claim 16 (depends on 15) The attachment assembly of claim 15, wherein said at least one second damping element is positioned between said first damper mass and said second damper mass. ### Claim 17 (depends on 1) The attachment assembly of claim 1, wherein said at least one damper mass includes a rod bore extending through said damper mass and having a bushing receiving portion at a first end thereof and a rod receiving portion at a second end thereof, a lock nut end of said rod being coupled to said bushing receiving portion of said rod bore by a bushing, wherein a component end of said rod opposite said lock nut end extending at least partway through said rod receiving portion of said rod bore, and wherein said component end of said rod is coupled to said machine component.