Airbag coolant releasing device and airbag device

Patent metadata

Field	Value
Publication number	US-8925963-B2
Application number	US-201214346267-A
Country	US
Kind code	B2
Filing date	Aug 6, 2012
Priority date	Sep 21, 2011
Publication date	Jan 6, 2015
Grant date	Jan 6, 2015

Abstract

There is provided an airbag coolant releasing device for releasing a coolant into an airbag. The device includes: a cylinder which is formed into a cylindrical shape; a coolant pack which is formed of a flexible film, wherein a coolant is sealed in the coolant pack and the coolant pack is received in the cylinder; a piston which is inserted into the cylinder; a drive unit which drives the piston with respect to the cylinder such that the piston presses the coolant pack; and a nozzle which is provided in an end portion of the cylinder which is located opposite to a side of the drive unit and which releases the coolant ejected from the coolant pack into the airbag.

First claim

The invention claimed is:

1. An airbag coolant releasing device for releasing a coolant into an airbag, the device comprising:
a cylinder which is formed into a cylindrical shape;
a coolant pack which is formed of a flexible film, wherein a coolant is sealed in the coolant pack and the coolant pack is received in the cylinder;
a piston which is inserted into the cylinder;
a drive unit which drives the piston with respect to the cylinder such that the piston presses the coolant pack; and
a nozzle which is provided in an end portion of the cylinder which is located opposite to a side of the drive unit and which releases the coolant ejected from the coolant pack into the airbag.

2. The device according to claim 1 , wherein the coolant is sealed in the coolant pack in a liquid state.

3. The device according to claim 1 , wherein
the cylinder comprises a first member that is provided with the nozzle and a second member that is removably attached to the first member, and
the cylinder comprises a temporary lock mechanism including a locking portion which is provided in one of the first member and the second member and a locked portion which is provided in the other of the first member and the second member so as to be engaged with the locking portion.

4. The device according to claim 1 , wherein
the nozzle is provided with a conical body, and
the conical body is disposed in a center portion of an opening formed in an end face of the cylinder, and the conical body has a tip portion which is disposed on a side of the coolant pack.

5. An airbag device comprising:
an airbag which is formed into a bag-like shape and which is unfolded and inflated when unfolding gas is supplied into the airbag;
a retainer, wherein, in a normal state, the airbag is folded and received in the retainer;
an inflator which supplies the unfolding gas into the airbag; and
an airbag coolant releasing device according to claim 1 which releases a coolant into the airbag while or after the airbag is unfolded and inflated.

6. The airbag device according to claim 5 , wherein the inflator and the airbag coolant releasing device are disposed adjacent to each other on the same wall surface portion of the retainer.

7. The airbag device according to claim 5 , wherein the nozzle of the airbag coolant releasing device is disposed to protrude toward an inner side of the retainer.

Assignees

• Inuzuka Koji
• Noguchi Atsushi
• Takata Corp

Inventors

• Inuzuka Koji
• Noguchi Atsushi

Classifications

• Y10T137/85978

  With pump · CPC title

• B60R21/2334 Primary

  Expansion control features · CPC title

• B60R21/26 Primary

  characterised by the inflation fluid source or means to control inflation fluid flow {(arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10)} · CPC title

• B60R2021/26017

  a cooling agent being added to the inflation fluid · CPC title