Device for adjusting seat frame and back rest of chair of swivel

Details Device for adjusting seat frame and back rest of chair of swivel Device for adjusting seat frame and back rest of chair of swivel

1992-10-15

1994-08-23

Cuomo, Peter M.

Chairs and seats

Back movement resiliently opposed in operating position

Constantly oriented during up-and-down movement

297302, 297374, B60N 202

Patent

active

053401948

ABSTRACT:
A pedestal supported chair such as a swivel type chair in which a seat plate carrier pivoted to a base member fixed to the pedestal and having a back rest carrier is provided with adjustment means operable over range of user weights for adjusting a torsion spring mounted with its windings on the pivot by which the seat plate carrier is mounted to the base member. First legs of the spring member engage the seat plate carrier and second spring legs are connected to a holder supported from the base member. Rotation of a shaft passing through the holder moves the holder towards or away from the base member and results in greater or lesser tightening of the windings of the torsion spring to compensate in corresponding manner for the greater or lesser weight loadings which can be imposed on the seat plate carrier and on a chair back rest carrier when a user whose weight will be any one of such in a range of weights, sets a positioning relationship between the seat element and back rest and back rest intended to be that most comfortable to the user.

REFERENCES:
patent: 1909018 (1933-05-01), Sengpiel
patent: 2341124 (1944-02-01), Sheldrick
patent: 3072436 (1963-01-01), Moore
patent: 4832402 (1989-05-01), Zund
patent: 4909472 (1990-03-01), Piretti
patent: 4943115 (1990-07-01), Stucki
patent: 4966411 (1990-10-01), Katagiri et al.
patent: 5224758 (1993-07-01), Takamatsu et al.

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