# US 11,305,215 B2 · Filter device

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- Number: US 11,305,215 B2
- Document ID: US11305215B2
- Status: Granted
- Kind: B2
- Application number: 16/826,025
- Filed: 2020-03-20
- Published: 2020-07-09
- Granted: 2022-04-19
- Earliest claimed: 2017-11-17
- Assignees: Yamashin-Filter Corp.
- Applicants: Yamashin-Filter Corp.
- Inventors: Nobuyuki Kitajima; Mitsuhiro Yamaguchi
- Web page: https://patentgrep.com/patent/US11305215B2

## CPC

- B01D 29/15: arranged for inward flow filtration
- B01D 35/0276: {Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs}
- B01D 29/114: {arranged for inward flow filtration (B01D29/15, B01D29/33 take precedence)}
- B01D 29/21: with corrugated, folded or wound sheets
- B01D 29/56: in series connection
- B01D 29/60: integrally combined with devices for controlling the filtration
- B01D 29/608: {by temperature measuring}
- B01D 35/005: {Filters specially adapted for use in internal-combustion engine lubrication or fuel systems}
- B01D 35/147: Bypass or safety valves
- B01D 35/1475: {Pressure relief valves or pressure control valves}
- B01D 35/30: Filter housing constructions
- B01D 2201/301: Details of removable closures, lids, caps, filter heads
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A filter device that facilitates maintenance is provided. A case that internally includes a filter element includes a lid body. The lid body includes a flange portion having a substantially cylindrical shape fixed to the case and a cover having a substantially plate shape detachably provided to the flange portion. The flange portion has a first hole, and the cover has a second hole. The first hole and the second hole communicate between a space inside the case and a space outside the case.

## Claims

### Claim 1

A filter device, comprising:
a case having a substantially bottomed tubular shape with an open upper end;
a filter element having a substantially cylindrical shape provided inside the case;
a lid body provided on the case so as to cover the upper end of the case; and
an inflow portion and an outflow portion provided in the case, the inflow portion and the outflow portion communicating between an internal space and an external space of the case; and
a detector that detects an environmental parameter,
wherein:
the lid body includes a flange portion and a cover, the flange portion having a substantially cylindrical shape is fixed to the case, and the cover having a substantially plate shape is provided on an upper side of the flange portion so as to cover a hollow portion of the flange portion;
the cover is detachably provided to the flange portion,
the flange portion has a first hole;
the cover has a second hole;
the first hole and the second hole communicate between the space inside the case and the space outside the case;
the flange portion is sandwiched between the cover and the case; and
the flange portion has a third hole opened in a direction along a plane perpendicular to a central axis of the case having a substantially bottomed tubular shape, the detector being inserted in the direction into the third hole.

### Claim 2 (depends on 1)

The filter device according to claim 1, comprising
a valve provided on the cover, wherein
the valve includes a valve seat having a substantially cylindrical shape provided on the cover,
the valve seat has a fourth hole, and
the first hole, the second hole, and the fourth hole communicate between the space inside the case and the space outside the case.

### Claim 3 (depends on 1)

The filter device according to claim 1,
wherein
the third hole is closed with the detector,
the first hole has one end opening to a side surface or a bottom surface of the third hole, and
the first hole and the second hole communicate between a space inside the third hole and the space inside the case.

### Claim 4 (depends on 1)

The filter device according to claim 1, wherein
the case is provided inside a tank,
the lid body is provided on an upper side of the tank,
the second hole with a substantially U shape has both ends opening to a surface on a lower side of the lid body,
the first hole is a hole penetrating in a thickness direction of the flange portion,
the tank has a fourth hole at a position overlapping with the first hole in a plan view, and
the first hole, the second hole, and the fourth hole communicate between the space inside the case and a space outside the case and inside the tank.

### Claim 5 (depends on 4)

The filter device according to claim 4, comprising
a valve provided on the cover, wherein
a fifth hole is formed in the valve, and
the first hole, the second hole, the fourth hole, and the fifth hole communicate between the space inside the case and the space outside the case and inside the tank.