公开(公告)号：US11714016B2

公开(公告)日：2023-08-01

申请号：US17396233

申请日：2021-08-06

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuki Sasaki ,  Megumi Nomoto ,  Tatsuhiro Oshita

IPC: G01L19/14 ,  F16J15/02 ,  G01L13/02

CPC classification number: G01L19/147 ,  F16J15/022 ,  G01L13/025

Abstract: A leakage of liquid inside a differential pressure detection device is reliably preventable. A diaphragm portion that detects a differential pressure as a pressure difference between a high pressure side and a low pressure side includes an annular member, a strain gauge provided in a hollow portion of the annular member, and a first plate and a second plate provided such that the annular member and the strain gauge are sandwiched. The first plate and the second plate each abut on a first annular packing. A first groove and a second groove (the first annular packing) overlap with the annular member when viewed from a first direction along an axis of the first hole.

公开(公告)号：US10792597B2

公开(公告)日：2020-10-06

申请号：US15842977

申请日：2017-12-15

Applicant: YAMASHIN-FILTER CORP.

Inventor： Meiho Taku ,  Makoto Ishizuka ,  Tatsuhiro Oshita

IPC: B01D36/00 ,  B01D35/02 ,  B01D29/00 ,  B01D29/07 ,  B01D24/00 ,  F15B11/00 ,  F15B21/04 ,  B01D19/00 ,  F02M37/50 ,  F02M37/54 ,  B01D35/027 ,  B01D29/33 ,  B01D29/58 ,  B01D35/00 ,  B01D39/12 ,  B01D39/20

Abstract: A tank for storing oil includes a suction strainer with first and second filtration portions. The first filtration portion has a substantially cylindrical shape and formed by bending a thin plate into a pleated shape. The second filtration portion is provided on the outer side of the first filtration portion. The second filtration portion has a substantially cylindrical shape and is formed of a material having a plurality of spaces formed in a surface and interior of the material.

公开(公告)号：US10525386B2

公开(公告)日：2020-01-07

申请号：US15953539

申请日：2018-04-16

Applicant: YAMASHIN-FILTER CORP.

Inventor： Tatsuhiro Oshita ,  Meiho Taku ,  Makoto Ishizuka

IPC: B01D35/147 ,  B01D29/07 ,  B01D29/11 ,  B01D29/58 ,  B01D36/00 ,  F15B1/26 ,  F15B21/041

Abstract: When a lid covers an opening portion formed at an upper end of a filter case with a bottomed substantially cylindrical shape inside which a filter element is disposed, the internal space between the lid and the filter case is formed. A bypass flow path connecting the internal space and outside space is formed in the lid, and a relief valve disposed moveably between a position closing the bypass flow path and a position opening the bypass flow path includes an air bleeder formed from a porous material.

公开(公告)号：US10272373B2

公开(公告)日：2019-04-30

申请号：US15843072

申请日：2017-12-15

Applicant: YAMASHIN-FILTER CORP.

Inventor： Meiho Taku ,  Makoto Ishizuka ,  Tatsuhiro Oshita

IPC: B01D36/00 ,  B01D29/33 ,  B01D35/00 ,  F15B1/26 ,  F15B21/04 ,  B01D19/00 ,  F01M1/10 ,  F16N39/00 ,  F15B21/044 ,  B01D35/027 ,  B01D35/147 ,  B01D29/21 ,  B01D29/92 ,  B04C3/06 ,  F16N29/00 ,  B04C3/00 ,  B04C9/00

Abstract: A return filter is provided in a tank, for removing bubbles from hydraulic oil before returning the hydraulic oil to the tank. A vortex forming portion that includes a spiral-shaped blade member is provided in an outflow portion that has a substantially cylindrical shape and communicates with a hollow portion of a filter element. Thus, a vortex forms in the hydraulic oil flowing through the outflow portion and bubbles contained in the hydraulic oil are collected.