# US 11,440,075 B2 · Press device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,075 B2 - Document ID: US11440075B2 - Status: Granted - Kind: B2 - Application number: 16/617,223 - Filed: 2018-08-07 - Published: 2020-03-19 - Granted: 2022-09-13 - Earliest claimed: 2017-09-19 - Assignees: Komatsu Industries Corporation - Applicants: Komatsu Industries Corporation - Inventors: Yusuke Masato - Web page: https://patentgrep.com/patent/US11440075B2 ## CPC - B21D 28/002: {Drive of the tools (B21D28/007 and B21D28/20 take precedence)} - H02P 27/00: Arrangements or methods for the control of AC motors characterised by the kind of supply voltage (of two or more motors H02P5/00; of synchronous motors with electronic commutators H02P6/00; of DC motors H02P7/00; of stepping motors H02P8/00) - B30B 15/148: {Electrical control arrangements} - B30B 15/26: Program-control arrangements - H02J 7/855: {with circuits adapted for supplying loads from the battery} - H02P 29/00: Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors (arrangements for starting electric motors H02P1/00; arrangements for stopping or slowing electric motors H02P3/00; control of motors that can be connected to two or more different electric power supplies H02P4/00; regulating or controlling the speed or torque of two or more electric motors H02P5/00; vector control H02P21/00) - H02J 7/345: {using capacitors as storage or buffering devices} - H02J 2207/50: Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors - Y02P 80/10: Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A press device includes a press device main body and a main breaker to supply or stop power from an external power supply to the press device main body. The press device main body includes a slide, a bolster disposed below the slide, a servomotor configured to drive the slide, a power storage unit able to supply stored power to the servomotor, a discharge unit configured to discharge a charge stored in the power storage unit, and a first contactor. An upper die can be mounted on the slide. A lower die can be disposed on the bolster. The first contactor interrupts an electrical connection between the power storage unit and the discharge unit in an energized state and electrically connects the power storage unit and the discharge unit in a non-energized state. The first contactor is supplied with power for energization from the external power source without passing through the main breaker. ## Claims ### Claim 1 A press device, comprising: a press device main body including a slide configured to have an upper die mounted thereon, a bolster disposed below the slide, the bolster being configured to have a lower die disposed thereon, a servomotor configured to drive the slide; a power storage unit configured to be able to supply stored power to the servomotor, a discharge unit configured to discharge a charge stored in the power storage unit, and a first contactor configured to interrupt an electrical connection between the power storage unit and the discharge unit in an energized state and electrically connect the power storage unit and the discharge unit in a non-energized state; and a main breaker configured to supply or stop power from an external power supply to the press device main body, the first contactor being supplied with power for energization from the external power source without passing through the main breaker. ### Claim 2 (depends on 1) The press device according to claim 1, wherein the press device main body further includes a DC bus line configured to supply power from the external power supply to the servomotor, the DC bus line being electrically connected to the power storage unit, and a second contactor configured to electrically connect the power storage unit and the DC bus line in an energized state, interrupt the electrical connection between the power storage unit and the DC bus line in a non-energized state, and be supplied with power for energization from the external power supply via the main breaker. ### Claim 3 (depends on 1) The press device according to claim 1, wherein the power storage unit includes a plurality of electric double layer capacitors. ### Claim 4 (depends on 1) The press device according to claim 1, wherein the first contactor includes a first movable contact configured to interrupt or connect a first line connecting the power storage unit and the discharge unit, and a first coil configured to move the first movable contact so as to interrupt the first line in the energized state and to connect the first line in the non-energized state, and the first coil is supplied with power for energization from a second line connecting the external power supply and the main breaker. ### Claim 5 (depends on 2) The press device according to claim 2, wherein the second contactor includes a second movable contact configured to interrupt or connect a third line connecting the DC bus line and the power storage unit, and a second coil configured to move the second movable contact so as to connect the third line in the energized state and to interrupt the third line in the non-energized state, and the second coil is supplied with power for energization from a fourth line supplying power from the main breaker to the servomotor.