Patent ID: 9161627
Filing Date: 2015-10-20
Classification: A47C

Abstract:
1. Device for synchronizing tilt of both a back and a seat of a chair, said chair comprising a back frame, a seat frame and a support constrained to, or coincident with, a base of said chair, a front rotatable crank hinged to said support and to a front portion of said seat frame thereby allowing rotational displacement between said support and said front portion of said seat frame, and a rear rotatable crank hinged to said support and to a rear portion of said seat frame thereby allowing rotational displacement between said support and said rear portion of said seat frame, said front and said rear crank constituting a four-bar linkage connecting said seat frame to said support, wherein said back frame is integral with said front rotatable crank, wherein said front rotatable crank and said rear rotatable crank allow tilting of said back frame and said seat frame for synchronizing the tilt of both the back and seat of the chair, and wherein, upon tilting of said back frame, said back frame and said front rotatable crank both rotate around a first pin constraining the front rotatable crank to said support.