US 6,145,925 A · Backrest for vehicle seats

Abstract

A backrest for vehicle seats, has a backrest frame, a backrest cushion which is fastened thereto and consists of a cushion layer and of a ventilation layer which covers the cushion layer and through which air can flow. A fan is provided for the active ventilation of the backrest cushion. For the purpose of improving the sitting comfort, the vehicle seat is equipped with a lordosis support, the fan being fastened largely centrally in the cushion area on the lordosis support at low vibrations. The fan is situated inside an air duct constructed in the cushion layer, the clear cross-section of the air duct being dimensioned such that the fan remains inside the air duct during its movement going along with the lordosis adjustment.

Claims7

Dependent claims

Backrest for vehicle seats, comprising:

a backrest frame,
a backrest cushion which is fastened to the backrest frame,
a foamed cushion layer,
a ventilation layer which covers the cushion layer formed as a coarse-mesh spaced knit through which air flows, and
a ventilator fan for active ventilation of the backrest cushion,
wherein a mechanical lordosis support, which can be adjusted for an adaptation to a spinal column curvature of a seat user is fastened to the backrest frame, and
wherein the fan is fastened largely centrally in a cushion area on the lordosis support at low vibrations such that it moves along without force in any adjustment of the lordosis support and in this case remains within an air duct sufficiently dimensioned for this purpose in a clear cross-section, which air duct penetrates the cushion layer from its rearward side facing the lordosis support to the ventilation layer.

4 more elements

Dependencies are inferred from the claim text.

Backrest for vehicle seats

Life of this patent

Backrest for vehicle seats

Life of this patent

Abstract

Claims7