Inflator

• US 10,005,420 B2
• Filed: 09/20/2016
• Issued: 06/26/2018
• Est. Priority Date: 09/30/2015
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: Sato, Makoto, Kuriyama, Yuji, Ono, Yoshio, Mori, Keisuke, Fuki, Shinichiro
• Primary Examiner(s): Brown, Drew J
• Application Number:
  US15/270,102
• Publication Number:
  US 20170088090A1
• Time in Patent Office: 644 Days
• CPC Class Codes: B60R 2021/01129 Problems or faults
• CPC Class Codes: B60R 2021/26029 Ignitors
• CPC Class Codes: B60R 2021/26058 using a combination of inflators
• CPC Class Codes: B60R 21/01 Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents electrical circuits for transmission of signals between steering wheel and the vehicle itself B60R16/027; for electrically actuating belt retractor locking means B60R22/343
• CPC Class Codes: B60R 21/264 using instantaneous generation of gas, e.g. pyrotechnic B60R21/268 takes precedence
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: B60R 21/272 with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators

Abstract

An inflator includes an inflator body that produces an inflation gas by burning a gas generating agent and a sensor that is mounted on the inflator body and is capable of detecting a degradation of the gas generating agent. The sensor is preferably composed of at least either one of a gas sensor, a pressure sensor, or a temperature sensor.

Claims

1. An inflator comprising an inflator body that produces an inflation gas by burning a gas generating agent and a sensor that is mounted on the inflator body and is capable of detecting a degradation of the gas generating agent, wherein:

the inflator body comprises;

an ignition device that ignites and burns the gas generating agent for producing a combustion gas; and

a housing that stores the gas generating agent and the ignition device and is provided with a gas discharge port via which the inflation gas, which is composed of the combustion gas, is discharged; and

the sensor is disposed on an inner surface of a region of the housing where the gas generating agent is stored, at a position remote from a straight line connecting an ignition region of the gas generating agent by the ignition device and the gas discharge port.

2. The inflator according to claim 1, wherein the sensor is composed of at least either one of a gas sensor, a pressure sensor or a temperature sensor.

3. The inflator according to claim 1, wherein the sensor is disposed proximate to the ignition device.

4. The inflator according to claim 1, wherein a detecting unit of the sensor, which detects a degradation of the gas generating agent, is disposed on an inner surface of the inflator body in such a fashion as to be exposed to the gas generating agent.

5. An inflator comprising an inflator body that produces an inflation gas by burning a gas generating agent and a sensor that is mounted on the inflator body and is capable of detecting a degradation of the gas generating agent, wherein:

the inflator body comprises;

an ignition device that ignites and burns the gas generating agent for producing a combustion gas;

a compressed gas that is mixed with the combustion gas of the gas generating agent at actuation of the inflator for producing the inflation gas; and

a housing that stores the gas generating agent, the ignition device and the compressed gas;

the housing comprises;

a combustion chamber that stores the gas generating agent and the ignition device;

a compressed gas chamber that stores the compressed gas and is provided with a gas discharge port via which the inflation gas is discharged; and

a gas outflow port that provides gas communication between the combustion chamber and the compressed gas chamber such that the combustion gas flows out of the combustion chamber into the compressed gas chamber via the gas outflow port, and is mixed with the compressed gas for producing the inflation gas; and

the sensor is disposed on an inner surface of a region of the combustion chamber where the gas generating agent is stored, and at a position remote from a straight line connecting an ignition region of the gas generating agent by the ignition device and the gas outflow port.

6. The inflator according to claim 5, wherein the sensor is disposed proximate to the ignition device.