Multi-stage backrest assembly

Details Multi-stage backrest assembly Multi-stage backrest assembly

2005-01-18

2005-01-18

Brown, Peter R. (Department: 3636)

Chairs and seats

Bottom or back with means to alter contour

Providing support for lower back region

C297S404000, C297S284300

Reexamination Certificate

active

06843530

ABSTRACT:
A multi-stage backrest assembly includes a support frame, a back plate, a head plate, a waist plate, a first elastic swivel device, and two second elastic swivel devices. Thus, the multi-stage backrest assembly has a pivotable function so as to fit the curve of the user's body ergonomically, thereby providing a comfortable effect to the user.

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