US 4,732,424 AGranted

Sitting furniture, in particular swivel chair

OwnerAngela Uredat-Neuhoffinventor

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Abstract

A swivel-chair (10) has a frame (15) on which a seat (24) is movably mounted. A back (22) is connected with the seat (24), and this back (22) may be turned around a connecting point (19) at the frame (15). At this connecting point (19) a rotary spring (40) is provided, which tends to turn the back (22) into its working position, and the seat (24) is supported and guided at a seat-guide (31) at its forward area, that is where the thighs of the user are resting. This seat-guide (31) is preferably made such, that it will keep the inclination of the seat (24) on movement thereof, thus the so-called seat-slope, at an ergonomically advantageous value. A movement into the rest position goes against the rotary spring (40) and if required also the seat-guide (31) Optionally a blocking-device (45) for the seat (24) may also be provided in order to be able to block the seat (24) in any desired position in accordance with the wishes of the user.

Sitting furniture, in particular a swivel chair (10;70) with a frame (15;

71), a seat having a front section and a rear section, (24;
79) and a back (22;
77) pivotably connected by a hinge (23) with the rear section of the seat, the back being pivotably mounted at two mounting positions, above the hinge (23), at a section of the frame extending rearwardly of the front section of the seat (19;
76), the seat being supported on the frame (15;71) by means of a seat-guide, provided at the front section of the seat, and being movable in forward and rearward directions corresponding to a rest position and a second working position respectively, and spring means (40;
96) for forcing the seat and back into the working position, the spring means (40;
96) in the area of at least one mounting position (19;
76) on said frame (15;
71), said at least one mounting position being positioned between the back (22;
77) and a section of the frame extending rearwardly of the front section of the seat (15;
71) above said hinge (23), an arcuate rotary spring at least partially surrounding said mounting position (19;
76), the rear section of the seat (24;
79) being rearwardly and upwardly inclined at an essentially fixed angle with respect to the front section of the seat, a guide means for the front section of the seat (24;
79) for the automatic adjustment of the slope of the seat, which corresponds to the slope of the back, the guide means including a longitudinal hole (31;83) for slidably receiving a cross bar (25) essentially transverse to a plane defined by the longitudinal hole (31;
83), the longitudinal hole (31;
83) being inclined upwardly and forwardly with respect to a plane tangential to a top surface of the front section of the seat (24;
79), whereby rearward rotation of the portion of the back above said at least one mounting position (19;
76) about said hinge (23) increases the angle between said seat (24;
79) and said back (22;
77) and causes said hinge (23) and said front and rear sections of said seat (24;
79) to move forward and upward, and forwardly and upwardly inclines said seat (24;79) so that a forwardmost portion of said front section of said seat (24;
79) is raised higher than a rearwardmost portion of the front section of said seat (24;79).

18 more elements

Abstract

Claims15