# US 2019/0168146 A1 · Oil separating device

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- Number: US 2019/0168146 A1
- Document ID: US20190168146A1
- Status: Published application
- Kind: A1
- Application number: 16/321,365
- Filed: 2017-08-10
- Published: 2019-06-06
- Earliest claimed: 2016-08-17
- Assignees: Nifco Inc.
- Applicants: Nifco Inc.
- Inventors: Stephen GARRETT; Alex INGLIS
- Web page: https://patentgrep.com/patent/US20190168146A1

## CPC

- B01D 45/08: by impingement against baffle separators
- B01D 46/003: {including coalescing means for the separation of liquid}
- B01D 50/20: Combinations of devices covered by groups B01D45/00 and B01D46/00
- F01M 13/0405: {arranged in covering members apertures, e.g. caps}
- B01D 39/083: {of organic material}
- F01M 13/04: having means for purifying air before leaving crankcase, e.g. removing oil
- F01M 2013/005: {having one or more deoilers}
- F01M 2013/0427: {the centrifuge device having no rotating part, e.g. cyclone}
- F01M 2013/0433: {with a deflection device, e.g. screen}
- F01M 2013/0438: {with a filter}
- F01M 2013/0461: {with a labyrinth}
- 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)
- F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING

## Abstract

An oil separating device for separating an oil mist from a blow-by gas is arranged on a flow passage of the blow-by gas. The oil separating device includes an oil separator having an inlet formed at one end thereof and an outlet formed at another end thereof opposite to the one end; a collision wall arranged at a downstream side of the oil separator, and including an uneven portion formed on a surface thereof to face the outlet of the oil separator; and a filter arranged between the oil separator and collision wall. The oil separator is formed such that the oil mist in the blow-by gas coalesces together to form a coalesced oil mist, the filter removes the coalesced oil mist from the blow-by gas, and the collision wall separates a remained oil mist remained in the blow-by gas through the filter.

## Claims

### Claim 1

An oil separating device for separating an oil mist from a blow-by gas, arranged on a flow passage of the blow-by gas, comprising:
an oil separator including an inlet formed at one end thereof and an outlet formed at another end thereof opposite to the one end;
a collision wall arranged at a downstream side of the oil separator, and including an uneven portion formed on a surface thereof to face the outlet of the oil separator; and
a filter arranged between the oil separator and collision wall,
wherein the oil separator is formed such that the oil mist in the blow-by gas coalesces together to form a coalesced oil mist, the filter removes the coalesced oil mist from the blow-by gas, and the collision wall separates a remained oil mist remained in the blow-by gas passing through the filter.

### Claim 2 (depends on 1)

The oil separating device according to claim 1, wherein the collision wall further comprises a side wall having a width larger than that of the filter and a height higher than that of the uneven portion in a direction toward the filter.

### Claim 3 (depends on 1)

The oil separating device according to claim 1, wherein the uneven portion includes concave and convex portions arranged alternately to increase a surface area collided with the blow-by gas, and each of the concave and convex portions vertically continuously extends in a direction perpendicular to a flow direction of the blow-by gas.

### Claim 4 (depends on 3)

The oil separating device according to claim 3, wherein the oil separator includes a curved wall along which the blow-by gas spirals to coalesce together.

### Claim 5 (depends on 1)

The oil separating device according to claim 1, wherein the filter is arranged apart from the uneven portion to form a space therebetween, and
the filter has a width larger than the outlet of the separator such that the blow-by gas in the space is discharged out from the space through the filter after colliding the blow-by gas with the collision wall.