Anti-crash seat for a vehicle

1. An anti-crash seat for a vehicle, the seat comprising a bucket and a frame fastened to a floor for carrying said bucket, said bucket being provided with a seat bottom and with a back for receiving a person, said seat including crash energy absorber means and antivibration means, wherein the seat includes inhibitor means for inhibiting said antivibration means to neutralize the antivibration means when the bucket is subjected to acceleration towards the floor that is greater than a predetermined threshold, wherein said crash energy absorber means include a first end fastened to the bucket and a second end movable relative to said frame, said inhibitor means being linked to said second end by link means to block said second end when the bucket is subjected to acceleration towards the floor that is greater than said predetermined threshold.

2. A seat according to claim 1 , wherein said antivibration means are fastened firstly to the bucket, and secondly to a member that is stationary relative to the bucket.

3. A seat according to claim 1 , wherein said second end is suspended from a link of the link means said link linking the second end to the inhibitor means.

4. A seat according to claim 1 , wherein said antivibration means are firstly fastened to a member that is stationary relative to the bucket, and are secondly linked to a second end of said crash energy absorber means.

5. A seat according to claim 4 , wherein said antivibration means are equally well linked directly to the second end or linked indirectly to said second end by connection means.

6. A seat according to claim 4 , wherein said antivibration means are antivibration means stressed in twisting arranged on said frame and linked to the second end.

7. A seat according to claim 4 , wherein said antivibration means are firstly fastened to a member that is stationary relative to the bucket and are secondly linked to said second end by a rocker beam of connection means hinged to the frame by a hinge, said hinge being arranged between a first zone of the beam and a second zone of the beam, said second end being fastened to said first zone and said antivibration means being fastened to said second zone.

8. A seat according to claim 7 , wherein said beam also constitutes link means linking said inhibitor means to said second end, said inhibitor means being fastened to said second zone of the beam.

9. An anti-crash seat for a vehicle, the seat comprising a bucket and a frame fastened to a floor for carrying said bucket, said bucket being provided with a seat bottom and with a back for receiving a person, said seat including crash energy absorber means and antivibration means, wherein the seat includes inhibitor means for inhibiting said antivibration means to neutralize the antivibration means when the bucket is subjected to acceleration towards the floor that is greater than a predetermined threshold, wherein said inhibitor means comprise a winder that co-operates with a link of a link means, said inhibitor means comprising blocker means for blocking said winder when the bucket is subjected to acceleration towards the floor that is greater than a predetermined threshold.

10. A method of protecting a person sitting on a seat against vibration and impact, the seat comprising a bucket and a frame fastened to a floor for carrying said bucket, said bucket being provided with a seat bottom and with a back for receiving a person, said seat including crash energy absorber means and antivibration means, wherein the seat includes inhibitor means for inhibiting said antivibration means to neutralize the antivibration means when the bucket is subjected to acceleration towards the floor that is greater than a predetermined threshold, and wherein said inhibitor means comprise a winder that co-operates with a link of a link means, said inhibitor means comprising blocker means for blocking said winder when the bucket is subjected to acceleration towards the floor that is greater than a predetermined threshold, in which method the antivibration means are activated in normal operation and said antivibration means are inhibited when the bucket of said seat is subjected to acceleration towards the floor that is greater than a predetermined threshold so as to allow only crash energy absorber means to act.

11. A method of protecting a person sitting on a seat against vibration and impact, the seat comprising a bucket and a frame fastened to a floor for carrying said bucket, said bucket being provided with a seat bottom and with a back for receiving a person, said seat including crash energy absorber means and antivibration means, wherein the seat includes inhibitor means for inhibiting said antivibration means to neutralize the antivibration means when the bucket is subjected to acceleration towards the floor that is greater than a predetermined threshold, and wherein said crash energy absorber means include a first end fastened to the bucket and a second end movable relative to said frame, said inhibitor means being linked to said second end by link means to block said second end when the bucket is subjected to acceleration towards the floor that is greater than said predetermined threshold, in which method the antivibration means are activated in normal operation and said antivibration means are inhibited when the bucket of said seat is subjected to acceleration towards the floor that is greater than a predetermined threshold so as to allow only crash energy absorber means to act.