公开(公告)号：US20210246991A1

公开(公告)日：2021-08-12

申请号：US17245911

申请日：2021-04-30

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki KITAJIMA ,  Nobuki SASAKI ,  Megumi NOMOTO

IPC: F16K17/04 ,  F16K37/00 ,  B01D35/143 ,  B01D35/147

Abstract: A differential pressure measurement range is widened and differential pressure can be measured particularly during low differential pressure. A first spool facing a space in a high pressure side is lighter than a second spool facing a space in a low pressure side in a state where a magnet is provided. Urging force of a first elastic member that urges the first spool toward the space in the high pressure side is smaller than urging force of a second elastic member that urges the second spool toward the space in the high pressure side, and the first elastic member and the second elastic member are disposed in series.

公开(公告)号：US20210364379A1

公开(公告)日：2021-11-25

申请号：US17396233

申请日：2021-08-06

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuki SASAKI ,  Megumi NOMOTO ,  Tatsuhiro OSHITA

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

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.