Chairs and seats – Headrest – Adjustable rectilinearly vertically
Patent
1982-07-30
1985-07-09
Lyddane, William E.
Chairs and seats
Headrest
Adjustable rectilinearly vertically
248414, 297391, A47C 736
Patent
active
045278342
ABSTRACT:
The headrest is adjustably mounted by a molded plastic guide inserted through an aperture in the mounting bracket concealed in the seat back and having a central bore for receiving a support post of the headrest. Longitudinally extending slots communicate with the central bore to define a plurality of circumferentially spaced radially yieldable flexure fingers. An abutment is carried by at least one of the flexure fingers and includes a ramp which momentarily deflects the flexure finger radially inward upon insertion of the plastic guide through the mounting bracket aperture and a shoulder which engages with the mounting bracket to retain the plastic guide in the mounting bracket. A spring bears radially inward upon at least one of the flexure fingers to urge frictional engagement with the support post and establish the support post at a desired vertically adjusted position. The support post has a necked down central portion defining an upwardly facing stop face. A flange molded integrally with the plastic guide overlies the top of the seat back and defines a recess opening which cages a retainer spring seating within the necked down central portion of the support post for engagement by the upward facing stop face to limit the upward adjusting movement of the headrest.
REFERENCES:
patent: 909223 (1909-01-01), Reynolds
patent: 1795747 (1931-03-01), Viken
patent: 2711475 (1955-06-01), Chadwick et al.
patent: 4427233 (1984-01-01), Matumoto
Brown Peter R.
General Motors Corporation
Leahy Charles E.
Lyddane William E.
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