Patent ID: 7614698

Claim:
A chair comprising a tilting seat and a back support for carrying a back piece, wherein said chair further comprising a bearing block, a rotatable eccentric cam, a handle and a rod passing eccentrically through the eccentric cam, said rod being connected to said eccentric cam without the ability to rotate relative to said eccentric cam, and being connected at one end to said handle for turning said rod, and wherein an arm is provided in which the rod is mounted such that said rod can be turned, wherein the bearing block is provided on the back support and the arm is provided on the bottom side of the seat; said chair further comprising a detent sleeve joined to said one end of the rod, said detent sleeve being unable to rotate relative to said rod, but able to slide along the rod between a first and a second position, a first detent apparatus and a second mating detent apparatus, wherein said detent sleeve in the first position engages with said second mating detent apparatus on the seat by said first detent apparatus fashioned on said detent sleeve; in the second position, the first detent apparatus on the detent sleeve is disengaged from the second mating detent apparatus on the seat and spring-loaded against the first position; and the handle is joined to the detent sleeve without being able to rotate relative to said detent sleeve.