Chairs and seats – Headrest
Patent
1998-12-17
1999-11-02
Nelson, Jr., Milton
Chairs and seats
Headrest
297410, 2973441, 29735412, 29721612, 297DIG3, 2972846, A47C 736
Patent
active
059756373
ABSTRACT:
A vehicle seat includes a seat part displaceable at least in the seat longitudinal direction; a back rest that is held on the seat part; and an adjustable head restraint held on the back rest and having a head cushion. For automatically adapting the head restraint correctly in terms of safety to seat adjustments carried out by a seat user, a medium reservoir of variable volume, communicating with a filling and discharge device, is integrated in the head cushion so that the cushion front face is shifted forwards during an increase in volume and is drawn back again as a result of a reduction in volume. The filling quantity introduced into the medium reservoir or drawn off from the medium reservoir is controlled depending on the seat setting by means of a control unit. The medium reservoir also may include a pressure limiter that allows a controlled outflow of the reservoir when a predetermined pressure value, caused by the impact of the head, is reached.
REFERENCES:
patent: 3680912 (1972-08-01), Matsuura
patent: 4222608 (1980-09-01), Maeda
patent: 4655505 (1987-04-01), Kashiwamura et al.
patent: 4720146 (1988-01-01), Mawbey et al.
patent: 4923250 (1990-05-01), Hattori
patent: 5330255 (1994-07-01), Stawicki
patent: 5439271 (1995-08-01), Ryan
patent: 5458396 (1995-10-01), Rost
patent: 5782529 (1998-07-01), Miller, III et al.
Geuss Hartwich
Reichelt Werner
Schmidt-Spalding Helge
Daimler-Chrysler AG
Jr. Milton Nelson
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