Patent ID: 6299250
Filing Date: 2001-10-09
Classification: B60N,Y10S

Abstract:
A vehicle seat with a backrest portion (10) having at least two air cushions (11, 12) for contour adjustment in the lordosis region of the backrest, the air cushions being arranged one above another, and a control to select a desired lordosis region contour, comprising: an electronic control (17) for regulating air pressure in the air cushions (11, 12); a manually operable switching device (20) linked to input the electronic control (17); said switching device (20) having a first button (26) to signal the electronic control (17) to increase air pressure in the air cushions (11, 12) and a second button (27) to signal the electronic control (17) to decrease air pressure in the air cushions (11, 12); said switching device (20) having third and fourth buttons (28, 29) inputting said electronic control (17) to change the ratio of the air pressures in the air cushions (11, 12) with respect to each other; wherein operation of one of the first button (26) and of the second button (27) produces a simultaneous change in the air pressures in the air cushions (11, 12) while maintaining the ratio of air pressures in the air cushions to remain constant.