A device for forwardly and rearwardly adjusting the position of a safety headrest or pillow relative to the backrest of a vehicle seat, the headrest including a base member supported on the backrest and a frame member pivotally provided on the base member and covered by an outer cover for receiving and...http://www.google.sh/patents/US4304439?utm_source=gb-gplus-sharePatent US4304439 - Head rest adjusting device
