Synchronous-tilt reclining chair

A synchronous-tilt reclining office chair, comprising:

• a seat;
• a backrest interconnected to said seat;
• and
• a synchronous-tilt mechanism that controls synchronous movement of said backrest and said seat between a normal non-reclined position and a reclined position such that recline tension is a function of a force required to compress at least one tensioning spring mounted below said seat, a weight applied to said seat by a seat occupant, and a location of said weight applied to said seat relative to front and rear portions of said seat, whereby, as said weight is applied toward said front portion of said seat, said recline tension is reduced and, as said weight is applied toward said rear portion of said seat, said recline tension is increased;
• wherein the synchronous-tilt mechanism includes an arrangement comprising said backrest being interconnected to a seat base and movable relative to said seat base about a backrest pivot axis between a normal non-reclined position and a reclined position, said rear portion of said seat being interconnected to said backrest such that as said backrest is pivoted to the reclined position, said rear portion of said seat is elevated, and said front portion of said seat being interconnected to said seat base such that said seat is movable about a seat front pivot axis and such that as said backrest is pivoted to the reclined position and said rear portion of said seat is raised, said seat pivots about said seat front pivot axis and causes a front edge of said front portion of said seat to be lowered;
• wherein said at least one tensioning spring is mounted on said seat base beneath said seat such that a rear end of said at least one tensioning spring is mounted to said seat base in a stationary position relative to said seat base;
• and
• wherein the synchronous-tilt mechanism includes a plunger for engaging said at least one tensioning spring and a front support bar that interconnects to said plunger and defines said seat front axis pivot axis.