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公开(公告)号：US20200232559A1
公开(公告)日：2020-07-23
申请号：US16487786
申请日：2018-02-26
Applicant: Eagle Industry Co., Ltd.
Inventor： Tatsuhiro ARIKAWA
Abstract: A bellows excellent in durability has an accordion shape where crest parts with U-shaped cross sections and trough parts with U-shaped cross sections are repeatedly formed via slope parts, the slope parts leading to the crest part includes first portions, second portions, third portions and fourth portions which are continuously connected, in order, to one another from the crest part toward the adjacent trough parts, and in a free length state of the bellows, a separation distance between the second portions of the both slope parts is longer than separation distances between the first portions and between the third portions.
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公开(公告)号：US20200158144A1
公开(公告)日：2020-05-21
申请号：US16605777
申请日：2018-04-27
Applicant: Eagle Industry Co., Ltd.
Inventor： Tatsuhiro ARIKAWA
IPC: F15B15/14
Abstract: Provided is an accumulator for easier maintenance of a metal bellows. The accumulator includes a housing having a shell provided with an opening portion and a disk-shaped base body to which one end of a metal bellows with an outside diameter smaller than the inside diameter of the opening portion is welded and fixed, the interior of the housing partitioned on the inside and outside of the metal bellows in a tightly closed manner, in which the base body is formed to have an outside diameter greater than the outside diameter of the metal bellows, and the base body is fixed detachably to the shell.
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公开(公告)号：US20160108935A1
公开(公告)日：2016-04-21
申请号：US14892039
申请日：2014-05-21
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Tatsuhiro ARIKAWA
IPC: F15B1/10
CPC classification number: F15B1/103 , F15B2201/40 , F16J3/047
Abstract: A metal bellows (110) for an accumulator (100) into which a hydraulic fluid is drawn in, has a bellows-shape in which ridge fold portions (110a) and valley fold portions (110b) are formed repeatedly with slope portions (110c) in between, wherein two of the slope portions (110c) that are adjacent to each other via a common ridge fold portion (110a) have: first slope portions (110c1) which extend from the common ridge fold portion (110a) and second slope portions (110c2) each of which extends from each of the first slope portions (110c1) such that a distance therebetween becomes much greater than the first slope portions (110c1) as the second slope portions (110c2) extend toward the adjacent valley fold portions (110b), wherein the first slope portion (110c1) and the second slope portion (110c2) are connected at an inflection point (P).
Abstract translation: 一种用于蓄液器（100）的金属波纹管（110），其中液压流体被拉入其中，具有波纹管形状，其中脊部折叠部分（110a）和谷部折叠部分（110b）以斜坡部分（110c）重复形成， 其中通过公共脊折叠部分（110a）彼此相邻的两个倾斜部分（110c）具有：从公共脊折叠部分（110a）延伸的第一倾斜部分（110c1）和第二倾斜部分 （110c2），其中每个从所述第一倾斜部分（110c1）中的每一个延伸，使得当所述第二倾斜部分（110c2）朝向相邻的谷折叠部分（110b）延伸时，它们之间的距离变得远大于所述第一倾斜部分 ），其中第一倾斜部分（110c1）和第二倾斜部分（110c2）在拐点（P）连接。
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公开(公告)号：US20160053933A1
公开(公告)日：2016-02-25
申请号：US14783329
申请日：2014-05-26
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Tatsuhiro ARIKAWA
CPC classification number: F16L55/24 , F15B1/08 , F15B2201/415 , F16B5/08
Abstract: An accumulator (100) includes: a housing (110) having an injection opening (112b) into which pressure gas is injected. A gas plug (150) seals the pressure gas in the housing (110). The housing (110) includes: a concave portion to which the gas plug (150) is fitted, and to which the gas plug (150) is welded with the welding portion (151) being melted on its bottom surface (110a). An inclined surface (110c) that extends from an edge portion of the concave portion toward an outside of the housing (110) such that a distance from a center of the injection opening (112b) increases, and the gas plug (150) includes a flange (152) which makes contact with the inclined surface (110c).
Abstract translation: 蓄能器（100）包括：壳体（110），其具有注入压力气体的喷射开口（112b）。 气塞（150）密封壳体（110）中的压力气体。 所述壳体（110）包括：凹部，所述气塞（150）装配到所述凹部，并且所述气塞（150）与所述焊接部（151）在其底面（110a）上熔融地焊接在所述凹部上。 从所述凹部的边缘部朝向所述壳体（110）的外侧延伸的倾斜面（110c），使得距离所述喷射口（112b）的中心的距离增大，并且所述气塞（150）包括： 与斜面（110c）接触的凸缘（152）。
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公开(公告)号：US20190383309A1
公开(公告)日：2019-12-19
申请号：US16464650
申请日：2017-11-10
Applicant: Eagle Industry Co., Ltd.
Inventor： Tatsuhiro ARIKAWA , Matsuyoshi YAMASHITA
IPC: F15B1/10
Abstract: An accumulator includes a bellows having a plurality of outer ridge portions and a plurality of inner annular ridge portions and configured to be capable of expanding and contracting, and a housing having a fluid supply port and fixed to one end of the bellows serving as a fixed end. An interior of the housing is partitioned in a sealed state into an inside and an outside of the bellows. The outer annular ridge portions are divided into at least a first sector and a second sector which are distributed in an expansion and contraction direction of the bellows such that the second sector is positioned between the first sector and the fixed end. The outer annular ridge portions included in the first sector have an outer diameter smaller than an outer diameter of the outer annular ridge portions included in the second sector.
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Patent Agency Ranking
公开(公告)号：US20180306210A1
公开(公告)日：2018-10-25
申请号：US15769649
申请日：2016-10-14
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Tatsuhiro ARIKAWA
IPC: F15B1/10
Abstract: An accumulator capable of suppressing collision of a metal bellows with a pressure vessel. A partition unit 300 includes: a tubular metal bellows 310, one end of which is side fixed to a pressure vessel 200 and which expands and contracts according to pressure in a fluid chamber and pressure in a gas chamber; and a bellows cap 320 which is fixed to another end side of the metal bellows 310, the partition unit 300 further including: a seal member 330 which is provided between the bellows cap 320 and a port 221 and seals a working fluid on the side of the fluid chamber via the metal bellows 310 when the metal bellows 310 contracts; and a sliding unit 350 which is fixed to the bellows cap 320 and slides in an expansion/contraction direction of the metal bellows 310 relative to a stay 400.
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公开(公告)号：US20170307083A1
公开(公告)日：2017-10-26
申请号：US15517496
申请日：2015-10-28
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Koji SATO , Kuniaki MIYAKE , Tatsuhiro ARIKAWA
Abstract: An impact on the tips of peaks of a metal bellows on contact is reduced, and deformation of the tips of the peaks even on contact is reduced to a minimum. In a free length state of a metal bellows 10 in an early stage of incorporation without extension and contraction, valleys each turn around in a U shape in cross section, peaks each turn around in an arc shape in cross section, the peaks are each provided in a position offset with respect to the center of a pitch between valleys adjacent to the peaks on both sides, and of bellies connected to the peaks on both sides, at least bellies located on the offset side are provided with a constriction protruding inward of the metal bellows.
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公开(公告)号：US20240159252A1
公开(公告)日：2024-05-16
申请号：US18284249
申请日：2022-03-17
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Yoshiyuki SHIMADA , Koji SATO , Yuta OKAMOTO , Tomoki SEKI , Tatsuhiro ARIKAWA
Abstract: A fluid circuit includes first switching valve that switches between flow passages and first flow passages according to a change in a fluid pressure to be applied, a second switching valve that is switched to a flow passage which applies the fluid pressure to the first switching valve, when a piston has reached an initial position or an end position, and second flow passages. A biasing force of a biasing member when the piston reaches the end position is smaller than a pressing force acting on the piston due to the fluid pressure caused by a fluid supply device, and a biasing force of the biasing member when the piston reaches the initial position is larger than a sum of a flow passage resistance force acting on the first flow passages and a flow passage resistance force acting on the second flow passages.
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公开(公告)号：US20200011384A1
公开(公告)日：2020-01-09
申请号：US16491125
申请日：2018-03-13
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Tatsuhiro ARIKAWA
Abstract: Fluid equipment includes a container configured for having first and second fluids therein, a first fluid outlet/inlet path provided for outflow and inflow of the first fluid, a second fluid outlet/inlet path for outflow and inflow of the second fluid, and a member configured for moving in the container in response to pressure of the first fluid, the fluid equipment transmitting energy from the first to the second fluid. A first bellows is configured such that one end is closed in a sealed state by the moving member, the other end is fixed to an inner surface part of the container in a sealed state, and the inside of the first bellows communicates with the first fluid outlet/outlet path.
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公开(公告)号：US20180128288A1
公开(公告)日：2018-05-10
申请号：US15570937
申请日：2016-06-16
Applicant: EAGLE INDUSTRY CO., LTD.
Inventor： Tatsuhiro ARIKAWA , Matsuyoshi YAMASHITA
IPC: F15B1/10
CPC classification number: F15B1/106 , F15B1/103 , F15B20/007 , F15B2201/3153 , F15B2201/41
Abstract: An accumulator has a pressure vessel, a partition portion comparting an internal space of the pressure vessel into a gas chamber having sealed gaseous matter and a liquid chamber having introduced liquid, and a bellows connected to the partition portion. The partition portion is provided with a bellows connection portion connected to the bellows, a seal arranged in a liquid chamber side of the bellows connection portion, and a seal retention portion fixed to the bellows connection portion and retains the seal. The seal retention portion is constructed by a leaf spring which is elastically deformable in a part thereof, and is structured by integrally forming a fixed portion fixed to the bellows connection portion, and a retention portion retaining the seal. Accordingly, the accumulator can reduce the number of parts of a pressure fluctuation absorbing mechanism, can be easily assembled, and can reduce a parts cost.
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