Seat consisting of seat portion and backrest, especially driver seat for motor vehicles

Claim 2

A seat comprising a seat portion and a backrest and provided with a cushion support means for vehicles, especially a driver seat for motor vehicles, characterized by means providing a fatigue-free seating which include molded shell means forming said seat portion and backrest, respectively, which are covered by removable cushion support means, the molded shell means forming the backrest of the seat being provided with indentations within the area of the shoulder blades and of the lumbar vertebrae for providing support surface means for the shoulder blades and lumbar vertebrae, and the cushion support means of the seat portion being constructed more hard within area of the ischium tuberosities of the pelvis.

Claim 3

A seat according to claim 1, characterized in that the molded shell means for the seat portion and backrest are adjustably arranged with respect to each other within a predetermined angle, the shell means of the seating portion being provided with a trough within the area of the pelvis and the shell means of the backrest being constructed approximately flat in the areas surrounding the indentations.

Claim 4

A seat according to claim 2, characterized in that the indentations are arranged on both sides of the longitudinal center plane of the backrest and are directed toward a respective cushion support means.

Claim 5

A seat according to claim 3, characterized in that the cushion support means consist of air-permeable material and are arranged individually removable.

Claim 6

A seat according to claim 4, characterized in that the cushion support means are provided with several securing straps secured by way of fastening means arranged at the shell means.

Claim 7

A seat according to claim 5, characterized in that the cushion support means of the seat portion corresponds essentially to the shape of the seat shell means and is provided at the bottom side of the forward seat edge with a hook-like bulge portion.

Claim 8

A seat according to claim 1, characterized in that the indentations are arranged on both sides of the longitudinal center plane of the backrest and are directed tOward a respective cushion support means.

Claim 9

A seat according to claim 1, characterized in that the cushion support means consist of air-permeable material and are arranged individually removable.

Claim 10

A seat according to claim 1, characterized in that the cushion support means are provided with several securing straps secured by way of fastening means arranged at the shell means.

Claim 11

A seat according to claim 1, characterized in that the cushion support means of the seat portion corresponds essentially to the shape of the seat shell means and is provided at the bottom side of the forward seat edge with a hook-like bulge portion.

Claim 12

A seat according to claim 1, characterized in that the cushion support means consist of air-permeable material and are arranged individually removable.

Claim 13

A seat according to claim 2, characterized in that the cushion support means of the seat portion corresponds essentially to the shape of the seat shell means and is provided at the bottom side of the forward edge with a hook-like bulge portion.

Claim 14

A seat comprising a seat portion and a backrest and provided with cushion support means for vehicles, especially a driver seat for motor vehicles, characterized by means providing a fatigue-free seating which include molded shell means forming said seat portion and said backrest, respectively, which are covered by removable cushion support means, the molded shell means of the seating portion being provided with a trough within the area ofthe pelvis of the the cushion support means of the seat portion being constructed harder within the area of the ischium tuberosities of the pelvis, and the molded shell means forming the backrest of the seat being provided with indentations within the area of the shoulder blades and of the lumbar vertebrae for providing support surface means for the shoulder blades and lumbar vertebrae.

Claim 15

A seat comprising a seat portion and a backrest and provided with cushion support means for vehicles, especially a driver seat for motor vehicles, characterized by means providing a fatigue-free seating which include molded shell means forming said seat portion and said backrest, respectively, which are covered by removable cushion support means, the molded shell means of the seating portion being provided with a trough within the area ofthe pelvis of the the cushion support means of the seat portion being constructed harder within the area of the ischium tuberosities of the pelvis, and the molded shell means forming the backrest of the seat being provided with indentations within the area of the shoulder blades and of the lumbar vertebrae for providing support surface means for the shoulder blades and lumbar vertebrae.

Claim 16

A seat according to claim 13, characterized in that the molded shell means forming the seat portion and the backrest are adjustably arranged with respect to each other within a predetermined angle.

Claim 17

A seat according to claim 13, characterized in that the indentations in the molded shell means of the backrest are arranged on both sides of the longitudinal center plane of the backrest and are directed toward a respective cushion support means.

Claim 18

An adjustable seat for vehicles, comprising first and second molded shells forming respectively seat portions and backrest portions of the seat, a first removable cushion provided on said first molded shell and having a shape corresponding essentially to the shape of said first molded shell, said first cushion being provided with a hook-like bulge portion at the front edge thereof for engaging the front edge of the first molded shell, said first molded shell being provided with a trough within the area of the pelvis, said first cushion being constructed harder in the area of the pelvis than in the other areas of said first cushion, said second molded shell being provided with indentations in the area of the shoulder blades and the area of the lumbar vertebrae whereby the trough in said first molded shell and the indentations in said second molded shell provide supporting surfaces for the shoulder blades and lumbar vertebrae.

Claim 19

An adjustable seat for vehicles, comprising first and second molded shells forming respectively seat portions and backrest portions of the seat, a first removable cushion provided on said first molded shell and having a shape corresponding essentially to the shape of said first molded shell, said first cushion being provided with a hook-like bulge portion at the front edge thereof for engaging the front edge of the first molded shell, said first molded shell being provided with a trough within the area of the pelvis, said first cushion being constructed harder in the area of the pelvis than in the other areas of said first cushion, said second molded shell being provided with indentations in the area of the shoulder blades and the area of the lumbar vertebrae whereby the trough in said first molded shell and the indentations in said second molded shell provide supporting surfaces for the shoulder blades and lumbar vertebrae.

Claim 20

An adjustable seat according to claim 16, further comprising a second removable cushion provided on said second molded shell, and said indentations in said second molded shell being arranged at both sides of the longitudinal center plane of said second molded shell and extend into the rear side of said second cushion.

Claim 21

An adjustable seat according to claim 17, wherein said first and second cushions are constructed of air-permeable material and are arranged individually removable.

Claim 22

An adjustable seat according to claim 18, wherein said first and second cushions are provided with a plurality of securing straps secured by way of fastening means arranged at said first and second molded shells.