RAPIDLY INFLATABLE IMPACT CUSHIONING DEVICE FOR HIGH-SPEED TRAVELLING VEHICLE

• US 3,843,150 A
• Filed: 11/23/1971
• Issued: 10/22/1974
• Est. Priority Date: 11/24/1970
• Status: Expired due to Term

• Current Assignee: Ikuo Harada, Isao Maeda, Masafumi Hamasaki, Nobuyuki Izawa
• Original Assignee: Ikuo Harada, Isao Maeda, Masafumi Hamasaki, Nobuyuki Izawa
• Inventors: Harada, Ikuo, Hamasaki, Masafumi, Maeda, Isao, Izawa, Nobuyuki
• Primary Examiner(s): Schonberg, David
• Assistant Examiner(s): Silverstrim, John P.
• Application Number:
  US05/201,332
• Time in Patent Office: 1,064 Days
• Field of Search: 280/15AB 244/138R 5/348R 182/137
• US Class Current: 280/729
• CPC Class Codes: B60R 2021/23115 with inflatable support compartments creating an internal suction volume
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration

Abstract

This invention relates to the structure of the bag system of a personal safety bag to be used in an impact cushioning device designed for protecting an occupant in an automobile or some other high-speed travelling vehicle against accidents due to violent deceleration such as by collision and to the air passage provided on the said bag system for permitting admission and discharge of the outer air.

Claims

1. A rapidly-inflatable impact cushioning device for use on a high-speed travelling vehicle, said device comprising a. A rapidly-inflatable cushioning bag member fixedly positioned on a support member, said cushioning bag member being provided with an air passage communicating with the atmosphere;

b. at least one unfoldable inflating bag member positioned within said rapidly-inflatable cushioning bag member and provided with a gas discharging outlet, said unfoldable bag member further being provided with gas-providing inflating means and being adapted to be inflated and unfolded when gas is received from said inflating means;

said cushioning bag member being capable of receiving air from the atmosphere upon inflation of said unfoldable bag member, thereby permitting rapid and simultaneous inflation of both bag members when gas is received by said unfoldable bag member; and

c. the hydraulic diameter of said air passage in said rapidly inflatable cushioning bag member and the hydraulic diameter of said gas discharging outlet in said unfoladable inflating bag member have the relationship expressed below;

- 2/15 MD + 58 <

OR = TD <

OR = - 7/18 MD + 105, wherein TD stands for the hydraulic diameter of the gas discharging outlet in the unfoldable inflating bag member expressed in mm, and MD stands for the hydraulic diameter of the air passage in the main bag member expressed in mm.

2. A device according to claim 1 wherein the ratio of the hydraulic diameter of said air passage to the inner volume of said rapidly inflatable cushioning bag member exceeds the value of 0.37 mm/l.

3. A device according to claim 1 wherein the ratio of the inner volume of said unfoldable inflating bag member to the inner volume of said rapidly inflatable cushioning bag member exceeds the value of 0.2.

4. A device according to claim 1 wherein the ratio of the inner volume of said unfoldable inflating bag member to the inner volume of said rapidly inflatable cushioning bag member exceeds the value of 0.2, the ratio of the hydraulic diameter of said air passage to the inner volume of said cushioning bag member exceeds the volume of 0.37 mm/l.