Chairs and seats – Bottom or back with means to alter contour – Providing support for lower back region
Patent
1999-05-21
2000-06-13
Nelson, Jr., Milton
Chairs and seats
Bottom or back with means to alter contour
Providing support for lower back region
2972844, A47C 454
Patent
active
06074006&
ABSTRACT:
An automotive seat assembly comprising a seat cushion and a seat back. The seat back includes opposing sides defining a center line there between and a lower pelvic support region for supporting the pelvic area of a seat occupant. An inflatable bladder assembly is supported by the seat back and includes a pair of bladders positioned on opposing sides of the center line in the pelvic support region which are expandable by a fluid medium from a generally flat uninflated condition to a generally wedge-shaped inflated condition. A controller activates a fluid pump and valve to control the bladders between the uninflated and inflated conditions. When the bladders are expanded to the inflated condition, the wedge-shape of the bladders cradles the spine and pelvic bone of the seat occupant to control pelvic rocking and reduce spinal muscle fatigue.
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Hadley Philip W.
Milosic Mari C.
Srivastava Manoj
Jr. Milton Nelson
Magna Interior Systems Inc.
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