公开(公告)号：US12233358B2

公开(公告)日：2025-02-25

申请号：US17727948

申请日：2022-04-25

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima ,  Nobuki Sasaki

IPC: B01D29/15

Abstract: A head made of metal is provided covering an opening of a filter case, and a filtration member having a tubular shape is provided in an internal space formed by the filter case and the head. A plate made of metal is provided near the opening of the filter case, and an IC tag is provided between the filtration member and the plate. The head is provided with an antenna unit including an antenna section including an antenna configured to communicate with the IC tag. The antenna unit includes a case having a rod shape and at least partially inserted into the head, the antenna section is provided adjacent to a first end corresponding to one end of the case, the case is provided in the head such that the antenna section is exposed when the head is viewed from a side of the filter case, and the plate is provided with an aperture from which the IC tag is exposed.

公开(公告)号：US12129879B2

公开(公告)日：2024-10-29

申请号：US17580855

申请日：2022-01-21

Applicant: YAMASHIN-FILTER CORP.

Inventor： Shigeru Hashimoto ,  Nobuyuki Kitajima

IPC: F15B21/04 ,  B01D24/00 ,  B01D29/07 ,  B01D35/027 ,  F15B21/041 ,  F15B21/044

CPC classification number: F15B21/041 ,  B01D24/00 ,  B01D29/07 ,  B01D35/027 ,  F15B21/044

Abstract: Air bubbles are removable with the use of an air vent structure having a compact and simple configuration. An air vent hole is formed in an upper plate that covers an entire upper end surface of a filtration section having a substantially tubular shape formed by bending a thin plate in a pleat shape. A moving member is provided to be movable between a position of closing the air vent hole and a position of opening the air vent hole.

公开(公告)号：US12025085B2

公开(公告)日：2024-07-02

申请号：US17551258

申请日：2021-12-15

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima ,  Mitsunobu Okamoto

IPC: F02M37/42 ,  B01D29/11 ,  B01D35/027

CPC classification number: F02M37/42 ,  B01D29/11 ,  B01D35/027

Abstract: A tank has two substantially parallel side surfaces, a tank first side surface and a tank second side surface, and the return filter is provided in the tank via an insertion hole formed in the tank first side surface. The strainer has one end provided on an outflow portion provided on a bottom surface of a filter case and the other end provided on the tank second side surface.

公开(公告)号：US11511934B2

公开(公告)日：2022-11-29

申请号：US16594865

申请日：2019-10-07

Applicant: YAMASHIN-FILTER CORP.

Inventor： Makoto Ishizuka ,  Nobuyuki Kitajima

IPC: B01D35/02 ,  B65D88/12 ,  B01D35/027 ,  B60K15/077

Abstract: Inside a tank body storing a liquid, a return filter is provided protruding downward from an upper surface of the tank body, and a substantially plate-like (plate-shaped) float is also provided that is inserted into the tank body and floats in accordance with change in a liquid surface of the liquid stored in the tank body. The float is provided with an opening larger than a diameter of a filter case, and in a plan view, the float is disposed between the tank body and the filter case.

公开(公告)号：US10926207B2

公开(公告)日：2021-02-23

申请号：US16198922

申请日：2018-11-23

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima ,  Nobuki Sasaki

IPC: B01D19/00 ,  B01D36/00 ,  B01D29/90 ,  B01D35/147 ,  B01D29/23 ,  B01D29/58 ,  B01D35/027

Abstract: When a liquid flows into a case along a tangential direction at an arbitrary point on a side surface of a filter case from an inflow pipe provided substantially around an outer periphery, at the side surface of the filter case, a swirling flow is produced in the liquid flowed and air contained in a fluid is collected in a center portion of the swirling flow to generate bubbles. The inflow pipe and a filter element are positioned not to overlap each other in a height direction, whereby the liquid flows into a hollow portion of a filter element from a case while swirling. The bubbles generated in the center portion of the swirling flow are released to a space above a liquid surface of the fluid retained in a tank through an air outlet portion formed in an upper end surface or the side surface of the filter case.

公开(公告)号：US12145084B2

公开(公告)日：2024-11-19

申请号：US17490755

申请日：2021-09-30

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima

IPC: B01D27/08 ,  B01D35/147 ,  B01D35/30 ,  B01D35/027

Abstract: An upper plate provided on upper ends of a filtration member and an inner tube includes a tubular portion along the inner tube, a rib formed so as to protrude inward in a radial direction from an inner circumference of the tubular portion, and a hole formed in the rib. A gripping member has a protrusion portion that protrudes downward from a body portion having a thick plate shape inserted into a hollow portion of the tubular portion. When the gripping member is mounted on the upper plate, the protrusion portion is inserted into the hole.

公开(公告)号：US11541338B2

公开(公告)日：2023-01-03

申请号：US16840507

申请日：2020-04-06

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima ,  Mitsuhiro Yamaguchi

IPC: B01D35/30 ,  B01D29/15 ,  B01D29/60 ,  B01D35/027 ,  B01D27/10

Abstract: A backflow of liquid inside a filter device during an operation of an internal combustion engine is allowed to be obviated while air inside the filter device is purged so as not to generate bubbles in the liquid. An outflow portion that includes a cylindrical portion having a substantially bottomed cylindrical shape and a back pressure valve provided inside the cylindrical portion is provided so as to penetrate a bottom surface of a case. In addition, a lid body provided on the case and an upper plate of a filter element so as to cover an upper end of the case has a first hole that communicates between a space inside the case and a space outside the case. When the back pressure valve opens (a valve body does not abut on a first valve seat), a space inside the filter element communicates with the space outside the case via a second through-hole formed in a side surface of the cylindrical portion.

公开(公告)号：US11504661B2

公开(公告)日：2022-11-22

申请号：US16807941

申请日：2020-03-03

Applicant: YAMASHIN-FILTER CORP.

Inventor： Youichi Nodomi ,  Nobuyuki Kitajima

IPC: B01D53/73 ,  B01D36/00 ,  B01D53/92 ,  B01D29/21 ,  B01D35/18

Abstract: An inner case being substantially cylindrical and being covered at an upper end is provided to cover a heater being substantially rod-shaped. A float being substantially plate-shaped and having substantially the same inner diameter as an inner diameter of the inner case is provided movably in the vertical direction in the inner case, and in the float, a hole through which the heater is inserted is formed. Gas is enclosed in a space surrounded by the inner case and the float. The length in the vertical direction of the inner case is smaller than the length in the vertical direction of the heater. In addition, when the float is positioned at a lower end of the inner case, a gap exists between the float and a bottom surface of a filter case.

公开(公告)号：US11406920B2

公开(公告)日：2022-08-09

申请号：US16897931

申请日：2020-06-10

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima

IPC: G06K19/07 ,  B01D29/23 ,  B01D35/147

Abstract: An IC tag is attached to a filter element and a contact of the IC tag with liquid is avoidable. An IC tag is provided inside an upper plate provided so as to cover an upper end surface of a filter medium in a filter element. A lid body is provided on the case into which the filter element is inserted, and an antenna is provided on the lid body.

公开(公告)号：US11052336B2

公开(公告)日：2021-07-06

申请号：US16840511

申请日：2020-04-06

Applicant: YAMASHIN-FILTER CORP.

Inventor： Nobuyuki Kitajima ,  Mitsuhiro Yamaguchi

IPC: B01D35/30 ,  B01D27/10 ,  B01D29/15 ,  B01D35/027 ,  B01D29/60

Abstract: A filter device allows avoiding liquid and dust before filtration to flow out to a tank during replacement of a filter element. A case includes a first tubular portion and a second tubular portion positioned with a lower side of the first tubular portion. The second tubular portion has a diameter smaller than that of the first tubular portion. In a state where the filter element is provided inside the case, a tubular portion of the filter element abuts on the second tubular portion. A part abutting on the second tubular portion of the tubular portion is absent of a hole. A part without abutment on the second tubular portion of the tubular portion has a plurality of holes.