Patent ID: 7036882

Claim:
A chair, in particular office chair, comprising a pedestal ( 2 ); a seat support ( 5 ) which supports itself thereon by a chair column ( 4 ), the seat support ( 5 ) comprising a front seat support part ( 6 ) and a rear seat support ( 7 ) which is connected thereto via a substantially horizontal pivoting axis ( 8 ) and which is pivotable in relation thereto about the pivoting axis ( 8 ); a seat ( 10 ) which supports itself on the seat support parts ( 6 , 7 ); a backrest ( 15 ) which is fixed to the rear seat support part ( 7 ); an adjustable-length energy storing device ( 27 ) for adjustment of the backrest ( 15 ) and seat ( 10 ) relative to each other, the energy storing device ( 27 ) having a first end engaged with the rear seat support part ( 7 ) and a second end engaged with the front seat support part ( 6 ), a manually operated interlocking mechanism ( 50 ) which locks the front seat support part ( 6 ) to the rear seat support part ( 7 ) against the bias of energy storing device ( 27 ) after the rear seat support part ( 7 ) is rotated around the pivoting axis ( 8 ) to a preselected position; wherein the interlocking mechanism ( 50 ) has a plurality of interlocking positions between the rear seat support part ( 7 ) and the front seat support part ( 6 ), and wherein the interlocking mechanism ( 5 ) has a plurality of discrete positions of interlocking, wherein the interlocking mechanism ( 50 ) comprises a lock ( 51 ) and a counterpart body ( 54 ) on the front seat support part ( 6 ) which has a plurality of locking receptacles ( 58 ), wherein the locking receptacles ( 58 ) are formed in an at least semi-circular circumferential section ( 57 ) of the counterpart body ( 54 ), the interlocking mechanism ( 50 ) being designed such that the counterpart body ( 54 ), upon pivoting of the rear seat support part ( 7 ) around pivoting axis ( 8 ) rotates relative to the lock ( 51 ) about an axis ( 55 ) thereof that is coaxial of the circumferential section ( 57 ).