# US 11,505,154 B2 · Vehicular seat cushion airbag

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- Number: US 11,505,154 B2
- Document ID: US11505154B2
- Status: Granted
- Kind: B2
- Application number: 17/135,193
- Filed: 2020-12-28
- Published: 2021-07-22
- Granted: 2022-11-22
- Earliest claimed: 2020-01-16
- Assignees: Hyundai Mobis Co., Ltd.
- Applicants: Hyundai Mobis Co., Ltd.
- Inventors: Kyu Sang Lee
- Web page: https://patentgrep.com/patent/US11505154B2

## CPC

- B60R 21/207: in vehicle seats
- B60R 21/0136: responsive to actual contact with an obstacle {, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle (monitoring crash strength in combination with passenger seat detection B60R21/01558)}
- B60R 21/23138: {specially adapted for side protection (B60R21/23184, B60R21/232 take precedence)}
- B60R 21/233: comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other (B60R21/232 takes precedence)
- B60R 21/276: with means to vent the inflation fluid source, e.g. in case of overpressure {(B60R21/30 takes precedence; venting means on inflatable member walls B60R21/239)}
- B60R 2021/0004: {Frontal collision}
- B60R 2021/0006: {Lateral collision}
- B60R 2021/0011: {Rear collision or recoiling bounce after frontal collision}
- B60R 2021/0053: {Legs}
- B60R 2021/0055: {Pelvis}
- B60R 2021/23107: {the bag being integrated in a multi-bag system}
- B60R 2021/23146: {seat mounted}
- B60R 2021/23324: {Inner walls crating separate compartments, e.g. communicating with vents}
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

## Abstract

A vehicular seat cushion airbag is disclosed. The seat cushion airbag includes a first cushion, which is mounted on a seat cushion of a vehicle so as to be expanded at the rear portion of a passenger's thigh, and a second cushion, which extends from the first cushion in an upward direction of a bolster portion of the seat cushion so as to be expanded toward the lateral side surface of the passenger's thigh, wherein the first cushion is expanded at the rear portion of the passenger's thigh so as to prevent forward movement of the passenger's pelvis, and the second cushion is expanded toward the lateral side surface of the passenger's thigh so as to prevent outward spreading of the passenger's legs.

## Claims

### Claim 1

A vehicular seat cushion airbag comprising:
a first cushion mounted on a seat cushion of a vehicle so as to be expanded upwards from the seat cushion to prevent forward movement of a passenger's pelvis;
a second cushion, which is positioned at an outer side of the first cushion and is expanded in an upward direction of the first cushion;
a first inflator, which is mounted on the seat cushion and generates airbag gas to be supplied to an inside of the first or second cushion; and
a separator, which is disposed between the first and second cushions and includes a plurality of vent holes, wherein the first and second cushion communicate with each other through the plurality of vent holes, and the airbag gas flows from one of the first and second cushions to a remaining one of the first and second cushions through the plurality of vent holes.

### Claim 2 (depends on 1)

The vehicular seat cushion airbag according to claim 1, wherein the first inflator is connected to the first cushion such that the first cushion is first expanded at a time of explosion of the first inflator and the airbag gas then flows to the second cushion from the first cushion through the plurality of vent holes so as to expand the second cushion.

### Claim 3 (depends on 1)

The vehicular seat cushion airbag according to claim 1, wherein the first inflator is connected to the second cushion such that the second cushion is first expanded at a time of explosion of the first inflator and the airbag gas then flows to the first cushion from the second cushion through the plurality of vent holes so as to expand the first cushion.

### Claim 4

A vehicular seat cushion airbag comprising:
a first cushion mounted on a seat cushion of a vehicle so as to be expanded upwards;
a second cushion, which is positioned at an outer side of the first cushion and is expanded in an upward direction of the first cushion;
a first inflator, which is mounted on the seat cushion and generates airbag gas to be supplied to an inside of the first or second cushion, wherein the second cushion is configured to be expanded toward a lateral side surface of a thigh of a passenger; and
a separator, which is disposed between the first and second cushions and includes a plurality of vent holes, wherein the first and second cushion communicate with each other through the plurality of vent holes, and the airbag gas flows from one of the first and second cushions to a remaining one of the first and second cushions through the plurality of vent holes.

### Claim 5

A vehicular seat cushion airbag comprising:
a first cushion mounted on a seat cushion of a vehicle so as to be expanded upwards;
a second cushion, which is positioned at an outer side of the first cushion and is expanded in an upward direction of the first cushion;
a first inflator, which is mounted on the seat cushion and generates airbag gas to be supplied to an inside of the first or second cushion, wherein each of the first and second cushions is composed of a pair of cushions, which are symmetrically mounted on two lateral sides of the seat cushion configured to be expanded toward two lateral side surfaces of thighs of a passenger; and
a separator, which is disposed between the first and second cushions and includes a plurality of vent holes, wherein the first and second cushion communicate with each other through the plurality of vent holes, and the airbag gas flows from one of the first and second cushions to a remaining one of the first and second cushions through the plurality of vent holes.

### Claim 6 (depends on 1)

The vehicular seat cushion airbag according to claim 1, wherein the first and second cushions are expanded so as to surround a thigh of a passenger.

### Claim 7 (depends on 1)

The vehicular seat cushion airbag according to claim 1, further comprising a second inflator, which is mounted on the seat cushion and generates airbag gas at a time of explosion thereof,
wherein the first inflator is connected to the first cushion, and the second inflator is connected to the second cushion.

### Claim 8 (depends on 7)

The vehicular seat cushion airbag according to claim 7, further comprising a controller adapted to perform control of explosion of the first and second inflators,
wherein the controller performs control to explode the first inflator when a front collision signal or a rear collision signal is input from a collision sensor.

### Claim 9 (depends on 7)

The vehicular seat cushion airbag according to claim 7, further comprising a controller adapted to perform control of explosion of the first and second inflators,
wherein the controller performs control to explode the second inflator when a lateral collision signal is input from a collision sensor.

### Claim 10 (depends on 1)

The vehicular seat cushion airbag according to claim 1, wherein the first and second cushions are expanded at a stitch line of the seat cushion.