公开(公告)号：US20240003469A1

公开(公告)日：2024-01-04

申请号：US18259656

申请日：2021-11-22

申请人： NIPPON PILLAR PACKING CO., LTD.

发明人： Toshihide IIDA ,  Kenji ONISHI ,  Hiroki TANABE ,  Yu NOTOJI ,  Shohei MINAMIHARA

IPC分类号： F16L15/04 ,  F16L19/025 ,  F16L21/05

CPC分类号： F16L15/04 ,  F16L19/025 ,  F16L21/05

摘要： A fitting body is tubular, whose first and second axial end portions include a connector for a tube and an annular groove, respectively. A sleeve has first and second axial end portions including an annular protrusion and a connector for another tube, respectively. A nut is engaged with an external thread of the fitting body or the sleeve. Engagement of the external thread with the nut causes press—fit of the annular protrusion into the annular groove to form a seal region. Under a condition that a depth of the annular groove is three or more times as large as a thickness of a radially inward or outward wall of the annular groove, an axial distance from the seal region to a bottom of the annular groove exceeds ten times an increment width of the annular groove caused by the press-fit of the annular protrusion into the annular groove.

公开(公告)号：US20240003468A1

公开(公告)日：2024-01-04

申请号：US18253811

申请日：2021-08-26

申请人： NIPPON PILLAR PACKING CO., LTD.

发明人： Toshihide IIDA ,  Kenji ONISHI ,  Yu NOTOJI ,  Shohei MINAMIHARA ,  Hiroki TANABE

IPC分类号： F16L15/04 ,  F16L15/06 ,  F16L19/025

CPC分类号： F16L15/04 ,  F16L15/06 ,  F16L19/025

摘要： One of an external thread of a fitting body and an internal thread of a sleeve includes two thread ridges and the other includes two thread grooves. The two thread ridges have transverse cross sections different in shape or size. A transverse cross section of the first thread groove allows that of the first thread ridge to be fit thereinto. A transverse cross section of the second thread groove prevents that of the first thread ridge from being fit thereinto but allows that of the second thread ridge to be fit thereinto. A leading portion of the second thread ridge is tapered in width. A leading portion of the first thread groove is inversely tapered in width. A leading portion of the first thread ridge has a transverse cross section that extends beyond a transverse cross section of the leading portion of the second thread groove.

公开(公告)号：US20220213882A1

公开(公告)日：2022-07-07

申请号：US17605265

申请日：2020-02-07

申请人： NIPPON PILLAR PACKING CO., LTD.

发明人： Kazukiyo TESHIMA ,  Yu NOTOJI ,  Shingo HIGUCHI

IPC分类号： F04B43/02 ,  F04B53/14

摘要： A rolling diaphragm 5 of a rolling diaphragm pump 1 has a movable portion 31 reciprocatable together with a piston 3, a fixed portion 32 fixed to a housing 2, and a thin film portion 33 connecting the movable portion 31 and the fixed portion 32 and bending due to reciprocation of the piston 3. A rubber layer 6 is overlaid on the thin film portion 33 without being adhered to the thin film portion 33, an end portion 6a on the movable portion 31 side of the rubber layer 6 is fixed to the piston 3, and an end portion 6b on the fixed portion 32 side of the rubber layer 6 is fixed to the housing 2.