# US 10,865,814 B2 · Hydraulic actuator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,814 B2 - Document ID: US10865814B2 - Status: Granted - Kind: B2 - Application number: 16/148,262 - Filed: 2018-10-01 - Published: 2019-05-16 - Granted: 2020-12-15 - Earliest claimed: 2017-11-15 - Assignees: Kabushiki Kaisha Ogura - Applicants: Ogura & Co., Ltd. - Inventors: Kiyoshi Kimura - Web page: https://patentgrep.com/patent/US10865814B2 ## CPC - B23D 29/00: Hand-held metal-shearing or metal-cutting devices (with nibbling action B23D27/02; hand-operated devices for metal-cutting otherwise than by shearing B26B) - F15B 13/0422: {with manually-operated pilot valves, e.g. joysticks} - B23D 17/06: actuated by fluid or gas pressure - F15B 11/10: in which the servomotor position is a function of the pressure {; Pressure regulators as operating means therefor} - F15B 13/0402: {for linearly sliding valves, e.g. spool valves} - F15B 15/18: Combined units comprising both motor and pump - F16H 25/186: {with reciprocation along the axis of oscillation} - F16K 11/14: operated by one actuating member, e.g. a handle (with one plug turning in another F16K11/12) - A62B 3/005: {Rescue tools with forcing action} - B25F 3/00: Associations of tools for different working operations with one portable power-drive means; Adapters therefor - B25F 5/005: {Hydraulic driving means} - F15B 2211/20507: Type of prime mover - F15B 2211/324: manually, e.g. by using a lever or pedal - 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) - F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR - F16H: GEARING - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00) - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} ## Abstract A hydraulic actuator includes a switching part that is provided with an oil passage for sending pressurized oil generated by a hydraulic pump to a tool and returning return oil from the tool to the hydraulic pump. The switching part switches a route of at least one of the pressurized oil and the return oil. The switching part includes an operating portion (for example, an operation knob) and an axis portion (for example, a spool) that advances or retreats when the operating portion is turned. When the operating portion is turned, the axis portion advances or retreats in a direction orthogonal to a direction of turning the operating portion, whereby the route of the oil passage is switched. ## Claims ### Claim 1 A hydraulic actuator comprising: a hydraulic pump that generates pressurized oil; a tool that is operated by the pressurized oil generated by the hydraulic pump; an oil passage for sending the pressurized oil generated by the hydraulic pump to the tool and returning return oil from the tool to the hydraulic pump; a switching part provided with the oil passage and configured to switch a route of at least one of the pressurized oil and the return oil, wherein the switching part includes an operating portion and an axis portion that advances or retreats when the operating portion is turned, and when the operating portion is turned, the axis portion advances or retreats in a direction orthogonal to a direction of turning the operating portion, whereby the route of at least one of the pressurized oil and the return oil in the oil passage is switched. ### Claim 2 (depends on 1) The hydraulic actuator as claimed in claim 1, wherein the switching part further comprises a converting member for converting a rotational movement of the operating portion into an advancing and retreating movement of the axis portion. ### Claim 3 (depends on 2) The hydraulic actuator as claimed in claim 2, wherein the operating portion, the converting member and the axis portion rotate to be in a same phase, a lead groove extending in a direction inclined with respect to a circumferential direction and an advancing and retreating direction of the axis portion is formed on an outer peripheral surface of the axis portion, and a fixing member provided in a fixed position is inserted in the lead groove. ### Claim 4 (depends on 1) The hydraulic actuator as claimed in claim 1, wherein the axis portion of the switching part is provided with a first groove extending along a circumferential direction of the axis portion, and when the axis portion advances or retreats by turning the operating portion, the route of at least one of the pressurized oil and the return oil in the oil passage is switched by changing the position of the first groove. ### Claim 5 (depends on 1) The hydraulic actuator as claimed in claim 1, wherein a hole into which the axis portion of the switching part is inserted is formed in a main portion of the hydraulic actuator, a groove extending along a circumferential direction of the hole is provided on a peripheral wall of the hole, and when the axis portion advances or retreats by turning the operating portion, the route of at least one of the pressurized oil and the return oil in the oil passage is switched by opening the groove that has been blocked by the axis portion or blocking the groove by the axis portion.