# US 10,502,239 B2 · Hydraulic system and method for reducing boom bounce with counter-balance protection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,239 B2 - Document ID: US10502239B2 - Status: Granted - Kind: B2 - Application number: 15/804,542 - Filed: 2017-11-06 - Published: 2018-06-07 - Granted: 2019-12-10 - Earliest claimed: 2013-05-31 - Assignees: Eaton Intelligent Power Limited - Applicants: Eaton Intelligent Power Limited - Inventors: Meng (Rachel) Wang - Web page: https://patentgrep.com/patent/US10502239B2 ## CPC - F15B 11/003: {Systems with load-holding valves} - B66C 13/066: {for minimising vibration of a boom} - E02F 9/2207: {for reducing or compensating oscillations} - E04G 21/0454: {with boom vibration damper mechanisms} - F15B 11/0445: {with counterbalance valves, e.g. to prevent overrunning or for braking} - F15B 21/008: {Reduction of noise or vibration} - F15B 2211/30515: Load holding valves - F15B 2211/3057: having two valves, one for each port of a double-acting output member - F15B 2211/329: actuated by fluid pressure - F15B 2211/5059: using double counterbalance valves - F15B 2211/526: electrically or electronically - F15B 2211/6313: the pressure being a load pressure - F15B 2211/6658: Control using different modes, e.g. four-quadrant-operation, working mode and transportation mode - F15B 2211/8616: the abnormal condition being noise or vibration - F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR - B66C: CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES ({specially adapted for lifting invalids A61G7/10;} rope, cable, or chain winding mechanisms, braking or detent devices therefor B66D; specially adapted for nuclear reactors G21) - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS ## Abstract A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic cylinder (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and a selection valve set (850). The selection valve set is adapted to self-configure to a first configuration and to a second configuration when a net load (90) is supported by a first chamber (116, 118) and a second chamber (118, 116) of the hydraulic cylinder, respectively. When the selection valve set is enabled in the first and second configurations, the second and first control valve may fluctuate hydraulic fluid flow to the second and first chamber, respectively, to produce a vibratory response (950) that counters environmental vibrations (960) of the boom. When the selection valve set is not enabled, the first and second counter-balance valves are adapted to provide the hydraulic cylinder with conventional counter-balance valve protection. ## Claims ### Claim 1 A hydraulic system for actuating a boom, the hydraulic system comprising: a hydraulic actuator including a first chamber and a second chamber; a first control valve fluidly connected to the first chamber via a first counter-balance valve; a second control valve fluidly connected to the second chamber via a second counter-balance valve, the first and second control valves being independently operable with respect to each other; and a controller that interfaces with the first and second control valves, wherein the controller is configured to generate a vibration control signal that is transmitted to at least one of the first and second control valves to produce a vibratory control response applied to at least one of the first and second chambers. ### Claim 2 (depends on 1) The hydraulic system of claim 1, wherein the boom includes at least three arms that are pivotally connected to one another. ### Claim 3 (depends on 1) The hydraulic system of claim 1, wherein the boom is a concrete placement boom. ### Claim 4 (depends on 1) The hydraulic system of claim 1, wherein the hydraulic actuator is a hydraulic cylinder. ### Claim 5 (depends on 1) The hydraulic system of claim 1, further comprising first and second pressure sensors that interface with the controller for respectively sensing pressures corresponding to the first and second chambers of the hydraulic actuator. ### Claim 6 (depends on 1) The hydraulic system of claim 1, wherein the controller interfaces with the first and second control valves to control extension and retraction of the hydraulic actuator. ### Claim 7 (depends on 6) The hydraulic system of claim 6, wherein the controller can apply the vibratory control signal while the hydraulic actuator is extending or retracting. ### Claim 8 (depends on 6) The hydraulic system of claim 6, wherein the controller can apply the vibratory control signal while the hydraulic actuator is static. ### Claim 9 A hydraulic system for actuating a boom, the hydraulic system comprising: a hydraulic actuator including a first chamber and a second chamber; a first control valve fluidly connected to the first chamber; a second control valve fluidly connected to the second chamber, the first and second control valves being independently operable with respect to each other; and at least one counter-balance valve connecting at least one of the first and the second control valves to at least one of the first and second chambers; and a controller that interfaces with the first and second control valves, wherein the controller is configured to generate a vibration control signal that is transmitted to at least one of the first and second control valves to produce a vibratory control response applied to at least one of the first and second chambers. ### Claim 10 (depends on 9) The hydraulic system of claim 9, further comprising a second counter-balance valve connecting the remaining at least one of the first and the second control valves to the corresponding at least one of the first and second chambers. ### Claim 11 (depends on 9) The hydraulic system of claim 9, wherein the first chamber of the hydraulic actuator is adapted to support a net load when vibration control is active and, wherein the second chamber of the hydraulic actuator is adapted to receive the vibratory control response when the vibration control is active.