Patent ID: 9192234
Filing Date: 2015-11-24
Classification: A47C

Abstract:
1. A chair comprising: a seat to support the weight of a user; a stationary base to hold the seat above the ground; and a back having first and opposite sides to support the back of the user, said back being coupled to said stationary base and adapted to tilt forwards and backwards relative to said stationary base, and including: a backing located at the first side of said back and a cushion back support having a curved configuration and located at the opposite side of said back to engage and support the user's lower back when the user sits erect in the chair and said back tilts forwards, said cushion back support also having an outside surface at which to engage the user's lower back and an inside surface being spaced from and lying opposite said backing, a tilt pressure-responsive rod located within the back of said chair between said backing and the inside surface of said cushion back support, and a flexible tension strap connected between said tilt pressure-responsive rod and said stationary base, said flexible tension strap bending back and forth to cause said tilt pressure-responsive rod to correspondingly move in first and opposite directions relative to said stationary base and ride over and against the inside surface of said cushion back support in response to the back of said chair tilting forwards and backwards to cause said cushion back support to progressively change its shape between said curved configuration and a relatively flattened configuration depending upon the location of said tilt pressure-responsive rod against the inside surface of said cushion back support.