Patent ID: 8177299

Claim:
A chair, comprising: a chair seat having a chair seat link; a chair back having a chair back link; a lifting mechanism that pushes up the chair seat link in response to a force that presses the chair back link to incline rearward; a base member that supports the chair seat link; a first articulation that connects the chair seat link to said base member so as to be vertically swingable; and a second articulation that swivelably connects the chair back link to the chair seat link, wherein said lifting mechanism comprises: a first link having one end connected to the chair back link; a second link that is connected at one end thereof to the chair seat link; a third link to which other ends of said first link and said second link are connected; a third articulation that swivelably connects said base member to said third link; a fourth articulation that swivelably connects said first link to the chair back link; a fifth articulation that swivelably connects the chair seat link to said second link; a sixth articulation that swivelably connects said second link to said third link; and a seventh articulation that swivelably connects said first link to said third link.