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公开(公告)号：US20170152965A1
公开(公告)日：2017-06-01
申请号：US15322214
申请日：2014-06-30
Applicant: Komatsu Ltd.
Inventor： Daigoh Fujii , Shuuji Hori , Masato Kageyama
CPC classification number: F16K37/0041 , F15B2013/0409 , F16K3/24 , F16K11/07 , F16K37/0033 , G01B7/003 , G01B7/046
Abstract: A stroke detection device for detecting, along a longitudinal direction, a stroke amount of a spool arranged in a valve main body. The stroke detection device includes: a device main body attached to the valve main body; a detection rod extending along the longitudinal direction of the spool, and movably arranged along the longitudinal direction inside the device main body, in a position where a tip end portion faces an end surface of the spool; a stroke detection unit configured to output a detection signal according to the stroke amount of the detection rod with respect to the device main body; and an attracting unit arranged in the tip end portion of the detection rod, the attracting unit being attracted to the end surface of the spool by magnetic force.
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公开(公告)号：US20250090983A1
公开(公告)日：2025-03-20
申请号：US18728950
申请日：2023-03-03
Applicant: Komatsu Ltd.
Inventor： Masato Kageyama , Shouta Seto
IPC: B01D35/147 , B01D29/11 , B01D35/00 , B01D35/143 , F16K1/36
Abstract: An oil filter device includes: a filter case including a case body and a lid, the lid configured to cover a case opening provided in the case body; a filter an element disposed in a main passage provided in an internal a space of the filter a case; a conductive valve body having conductivity and disposed in a bypass passage provided in the internal space; a valve conductive shaft having conductivity and supported by the valve body via a valve an insulating member; a valve conductive disc having conductivity and movably supported by the valve shaft and configured to close closing the bypass passage by coming into contact contacting with the valve body; a valve an elastic member that generates generating an elastic force to bring the valve disc into contact with the valve body; an a conductive input member having conductivity and supported by the lid via the case insulating member; a conductive relay elastic member having conductivity and connected to the input member; a conductive relay member having conductivity, fixed to the valve shaft and connected to the relay elastic member; and a controller that supplies supplying current to the valve disc via the input member to determine whether the bypass passage is closed based on an energization state across the valve disc and the valve body.
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公开(公告)号：US10100946B2
公开(公告)日：2018-10-16
申请号：US15322214
申请日：2014-06-30
Applicant: Komatsu Ltd.
Inventor： Daigoh Fujii , Shuuji Hori , Masato Kageyama
Abstract: A stroke detection device for detecting, along a longitudinal direction, a stroke amount of a spool arranged in a valve main body. The stroke detection device includes: a device main body attached to the valve main body; a detection rod extending along the longitudinal direction of the spool, and movably arranged along the longitudinal direction inside the device main body, in a position where a tip end portion faces an end surface of the spool; a stroke detection unit configured to output a detection signal according to the stroke amount of the detection rod with respect to the device main body; and an attracting unit arranged in the tip end portion of the detection rod, the attracting unit being attracted to the end surface of the spool by magnetic force.
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14.发明申请公开(公告)号：US20150192152A1
公开(公告)日：2015-07-09
申请号：US13814518
申请日：2012-09-26
Applicant: KOMATSU LTD.
Inventor： Masato Kageyama , Yuuki Yokoyama
CPC classification number: F15B15/2861 , G01D5/145 , G01D18/00
Abstract: An arithmetic processing portion is configured to perform a correction process for resetting an original position of the stroke position by using at least detection results of a voltage value of a first magnetic force sensor as well as a second magnetic force sensor according to the piston movement, and further not to perform the correction process to reset the original position of the stroke position by using the detection result of the first magnetic force sensor and the second magnetic force sensor right after an abutment when the piston is abutted to the stroke end based on a detection result of a stroke end abutment detecting system.
Abstract translation: 算术处理部被配置为通过至少使用根据活塞运动的第一磁力传感器的电压值和第二磁力传感器的检测结果来执行用于重置行程位置的原始位置的校正处理， 并且进一步不进行校正处理，以便当活塞抵靠行程末端时利用第一磁力传感器和第二磁力传感器刚好抵靠后的第一磁力传感器和第二磁力传感器的检测结果来重置行程位置的原始位置 行程端基台检测系统的检测结果。
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