公开(公告)号：US11008415B2

公开(公告)日：2021-05-18

申请号：US16322833

申请日：2017-07-07

Applicant: HITACHI, LTD.

Inventor： Yuri Kajihara ,  Takahito Muraki ,  Yasuhiko Tada ,  Jun Nunoshige ,  Takeshi Kondo

IPC: C08F293/00 ,  H01F27/32 ,  H01B3/44 ,  C08J7/16 ,  C08K5/55 ,  C08K5/098 ,  H02K3/30

Abstract: In a conventional self-healing material, although the resin properties after self-healing are restored to the same level as the initial refractoriness and strength of the resin, no further extension of life can be expected. A resin cured product according to the present invention includes: a first vinyl monomer having an ester bond; a second vinyl monomer having a hydroxyl group; a transesterification reaction catalyst; and a boron compound.

公开(公告)号：US10913680B2

公开(公告)日：2021-02-09

申请号：US16068759

申请日：2017-01-11

Applicant: HITACHI, LTD.

Inventor： Takashi Naito ,  Takuya Aoyagi ,  Tatsuya Miyake ,  Takeshi Kondo ,  Hiroki Kaneko ,  Kazutaka Okamoto

IPC: C03C8/24 ,  C03C8/16 ,  C03C8/18 ,  C03C27/06 ,  C03C3/12 ,  C03C8/20 ,  H01J9/02 ,  H01L23/10 ,  H01J11/48 ,  H01J11/22 ,  C03C8/02 ,  H01L23/02 ,  H01L51/50 ,  H01L31/0224 ,  H05B33/04 ,  H01J9/24 ,  H05B33/26 ,  C03C3/21 ,  C03C14/00 ,  C03C17/00 ,  C03C17/04 ,  H01L51/52 ,  H03H9/10

Abstract: The purpose of the present invention is to provide a lead-free glass composition in which crystallization is suppressed and which has a low softening point. This lead-free glass composition is characterized by containing silver oxide, tellurium oxide and vanadium oxide, and further containing at least one compound selected from among yttrium oxide, lanthanum oxide, cerium oxide, erbium oxide, ytterbium oxide, aluminum oxide, gallium oxide, indium oxide, iron oxide, tungsten oxide and molybdenum oxide as an additional component, and in that the content values (mol %) of silver oxide, tellurium oxide and vanadium oxide satisfy the relationships Ag2O>TeO2≥V2O5 and Ag5O≤2V2O5 when calculated in terms of the oxides, and in that the content of TeO2 is 25-37 mol. %.

公开(公告)号：US11708242B2

公开(公告)日：2023-07-25

申请号：US17283339

申请日：2019-09-24

Applicant: Hitachi, Ltd.

Inventor： Takeshi Kondo ,  Shinsuke Inoue ,  Naoaki Noguchi

IPC: B66B5/06

CPC classification number: B66B5/06

Abstract: A control system for an elevator includes a first car speed detection device and a second car speed detection device to measure a moving speed of the car, a hoist brake to apply braking to the hoist, emergency stop equipment to brake the car by grasping guide rails, and a control device to control the hoist, the hoist brake, and the emergency stop equipment based on outputs of the first car speed detection device and the second car speed detection device. If two pieces of velocity data that have been output from the first car speed detection device and the second car speed detection device respectively differ from one another and acceleration data of the car calculated from one that is higher of the two pieces of velocity data is equal to or more than a predetermined threshold, the control device decides if either car speed detection device is abnormal.