Apparatus for counteracting whiplash injuries

• US 5,833,312 A
• Filed: 02/07/1997
• Issued: 11/10/1998
• Est. Priority Date: 08/30/1994
• Status: Expired due to Fees

• Current Assignee: LTG Safecontrol Automotive AB
• Original Assignee: LTG Safecontrol Automotive AB
• Inventors: Lenz, Thomas
• Primary Examiner(s): Cuomo, Peter M.
• Assistant Examiner(s): BARFIELD, ANTHONY DERRELL
• Application Number:
  US08/776,767
• Time in Patent Office: 641 Days
• Field of Search: 297/216.1, 297/216.12, 297/216.13, 297/216.14, 297/DIG. 3, 280/730.1
• US Class Current: 297/216.13
• CPC Class Codes: B60N 2/427 Seats or parts thereof displaced during a crash
• CPC Class Codes: B60N 2/64 Back-rests or cushions B60N2/2222 takes precedence
• CPC Class Codes: B60N 2/643 shape of the back-rests B60N2/66 takes precedence
• CPC Class Codes: B60N 2/838 Tiltable
• CPC Class Codes: B60N 2/888 with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

Abstract

A protection apparatus is mounted in the seat of newly made or available vehicles of any kind for preventing or reducing so-called whiplash injuries when a person in the vehicle is thrown rearwardly in case the vehicle is run into from behind, or as a reaction of a violent movement forwardly in case of a crash with an object in front. The apparatus includes an activation device (4) for a protection apparatus mounted in the seat back (3) of the vehicle seat (2), which activation device is connected to a neck support (9) or to an equivalent, and which upon actuation of the protection apparatus forms a forwardly and preferably also upwardly expelled catcher canvas (10) for the upper part of the back, the neck and the head of the person in the vehicle seat.

Claims

1. A protection apparatus for reducing whiplash injuries for a person seated in a vehicle comprising:

a vehicle seat including (a) a seat back having a forward surface for engaging the person, and (b) a separate neck support extending upwardly from said seat back having a forward surface adapted to be adjacent the person;

a strong and flexible material connected to said seat so as to extend in a non-actuated configuration along said neck support and seat back from an upper end of said flexible material adjoined to the forward surface of said neck support to a lower end of said flexible material adjoined to the forward surface of said seat back;

an activation means, which is actuated when the person in the seat is thrown rearward during a whiplash inducing event and which is mounted in said seat back of the vehicle seat, for moving said flexible material from the non-actuated configuration to an actuated configuration, the actuated configuration being where said upper end of said flexible material is moved forwardly and hence stretched forwardly away from adjacent parts of the forward surfaces of said neck support and seat back to act as a resilient catcher for an upper part of a back, a neck, and a head of the person when the person is thrown rearward to reduce whiplash injuries.

2. A protection apparatus as claimed in claim 1:

wherein said activation means also moves said upper end of said flexible material upwardly as said flexible material is moved forwardly.

3. A protection apparatus as claimed in claim 1:

wherein said flexible material is an expandable pocket having a flexible front surface adjacent said neck support; and

wherein said activation means includes

a collapsible air accumulator which contains a gas, and

a passageway from said air accumulator to said expandable pocket such that when the person is thrown rearward and is pressed into said seat back, said air accumulator is collapsed and gas in said air accumulator is forced through said passageway and into said expandable pocket to inflate said expandable pocket and hence to stretch said flexible material.

4. A protection apparatus as claimed in claim 3:

wherein said activation means further includes

a pyrotechnical charge which is connected to said air accumulator, and

an ignition means for igniting said charge when the person is thrown rearward such that upon ignition of said charge explosion gases are produced and transmitted through the collapsing said air accumulator to said expandable pocket thereby speeding up and increasing the stretching of said flexible material.

5. A protection apparatus as claimed in claim 4:

wherein said air accumulator is a cylinder; and

wherein said ignition means is a retardation sensor.

6. A protection apparatus as claimed in claim 3:

wherein said activation means further includes

a pin mounted transversely in said seat back,

a lever rotatable about said pin, said lever having (a) a lower arm which ends in a plate, which said plate is located adjacent a bottom end of said seat back and (b) an upper arm which ends in a press bar, which said press bar is located adjacent said air accumulator,

whereby when the person is initially thrown rearward a lower part of the back of the person is thrust into said plate causing said lever to rotate about said pin and hence for said press bar to press into said collapsible air accumulator and to start forcing gas from said air accumulator through said passageway into said expandable pocket before the upper back of the person is pressed into said seat back.

7. A protection apparatus as claimed in claim 1:

wherein said flexible material is an expandable pocket having a flexible front surface adjacent said neck support; and

wherein said activation means includes

a solid cylinder which contains a gas,

a passageway from said cylinder to said expandable pocket,

a pyrotechnical charge which is connected to said cylinder, and

an ignition means for igniting said charge when the person is thrown rearward such that upon ignition of said charge explosion gases are produced and transmitted through said cylinder to said expandable pocket to inflate said expandable pocket and hence to stretch said flexible material.

8. A protection apparatus as claimed in claim 1:

wherein said lower end of said flexible material is attached to said seat back adjacent a bottom end of said seat back.

9. A protection apparatus as claimed in claim 1:

wherein said activation means includes

a spring which is pre-tensioned, and

a link attached at one end to said spring and at the other end to said neck support such that when said spring is released from tensioning said spring moves said link upwards which in turn moves said neck support upwardly to stretch said flexible material.

10. A protection apparatus as claimed in claim 9:

wherein said link also moves said neck support forwardly as said neck support is moved upwardly.

11. A protection apparatus as claimed in claim 9:

wherein said activation means includes an initiating means for releasing said spring from the pre-tensioning thereof, said initiating means including a second link located in a lower part of said seat back which is moved when a lower part of the back of the person is initially thrown rearward during a whiplash inducing event.

12. A protection apparatus as claimed in claim 9:

wherein said activation means further includes

a spring cylinder in which said spring is located,

a piston in said spring cylinder located below said spring,

a pyrotechnical charge located below said piston, and

a sensor which senses when the person is thrown rearward and which then ignites said charge producing explosion gases in said cylinder to drive said piston upward and to thereby speed up and increase the upward movement of said link caused by said spring.

13. A protection apparatus as claimed in claim 12:

wherein said sensor includes a mechanical part which is contacted by the person as the person is thrown rearward to activate said sensor.

14. A protection apparatus as claimed in claim 12:

wherein said sensor includes an electronic part which senses an abrupt speed change of the vehicle which occurs when the person is thrown rearward to activate said sensor.

15. A protection apparatus as claimed in claim 11:

wherein said activation means includes

a cylinder in which a piston is located,

a pyrotechnical charge located in said cylinder below said piston, and

a bar attached at one end to said neck support and at the other end to said piston, said bar being moved upwardly when said charge is ignited to move said piston so that said neck support is moved upwardly to stretch said flexible material.

16. A protection apparatus as claimed in claim 15:

wherein said bar also moves said neck support forwardly as said neck support is moved upwardly.

17. A protection apparatus as claimed in claim 15:

wherein said activation means further includes a sensor which ignites said charge, said sensor including a mechanical part which is contacted by the person as the person is thrown rearward to activate said sensor to ignite said charge.

18. A protection apparatus as claimed in claim 15:

wherein said activation means further includes a sensor which ignites said charge, said sensor including an electronic part which senses an abrupt speed change of the vehicle which occurs when the person is thrown rearward to activate said sensor to ignite said charge.