Chairs and seats – Back movement resiliently opposed in operating position – Back and bottom adjust in a fixed relationship
Reexamination Certificate
2002-09-24
2004-05-04
Cuomo, Peter M. (Department: 3636)
Chairs and seats
Back movement resiliently opposed in operating position
Back and bottom adjust in a fixed relationship
C297S300200, C297S303100, C297S320000, C297S268100
Reexamination Certificate
active
06729688
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a seat and backrest arrangement in seat furniture, in particular office chairs, which comprises a seat plate, a seat-plate support and a backrest support and in which the seat-plate, in the region of its front, knee-side edge, is connected moveably to the seat-plate support and, in the region of its rear edge, is connected moveably to the backrest support, the backrest support being coupled displaceably to the seat-plate support.
Seat and backrest arrangements of the generic type are known in particular in office chairs where it is possible—in order to obtain good seat comfort—not only to adapt the seat height, but also the seat depth and/or the backrest spring system to the specific requirements. Known office chairs which satisfy all demands are often considered to be too expensive in the market place even though the operation and design of these seat furniture items are convenient and satisfy the highest standards of quality.
A work chair or office chair of the generic type having a height-adjustable seat support, a seat plate which can be adjusted in inclination with respect to the said seat support and a backrest support whose inclination with respect to the seat plate is automatically adjusted in accordance with the inclination of the seat plate is disclosed in CH 659 179. In this “synchronous work chair” the inclination of the seat plate and the inclination of the backrest support are adjusted as a function of each other and the adjustments are cushioned by a complicated, multipart spring assembly.
SUMMARY OF THE INVENTION
This object generally is achieved according to the present invention by a seat and backrest arrangement for seat furniture, in particular office chairs, which comprises: a seat plate, a seat-plate support and a backrest support and in which the seat-plate, in the region of its front, knee-side edge, is connected moveably to the seat-plate support and, in the region of its rear edge, is connected moveably to the backrest support, the backrest support is coupled displaceably to the seat-plate support, and a spring means for cushioning the seat plate and the backrest support is arranged in the region of the front, knee-side edge of the seat plate between the seat plate and seat-plate support. Preferred embodiments and developments of the seat and backrest arrangement according to the invention and of corresponding seat furniture and office chairs emerge from the discussion of the invention below.
Exemplary embodiments of the invention are explained in greater detail below—without, however, wanting to restrict the scope of the invention—with reference to schematic drawings.
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Cuomo Peter M.
D'Adamo Stephen
Giroflex-Entwicklungs-AG
Smith Stuart I.
Venable LLP
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