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US 10,743,667 B2Granted
Chair back tilt mechanism
AssigneeKnoll, Inc.
InventorsGlen Oliver Loew, Andrew Blair Hector
Life of this patent
Estimating the term…
Abstract
A chair can include a chair back, or backrest, that is coupled to a base of a chair above a seat of the chair. A tilt mechanism can attach the backrest to the base at spaced apart locations. In some embodiments, the tilt mechanism can be configured so that the backrest rotates about multiple pivots as it reclines from an upright position to a reclined position to drive forward motion of the seat during recline of the backrest.
Claims20
A chair comprising:
- a seat;
- a backrest;
- a base, the seat supported by the base, at least one portion of the backrest connected to at least one of a seat frame of the seat and the base;
- and
- a tilt mechanism attached between the base, the seat, and the backrest, the tilt mechanism comprising:
- seat connections between a seat frame of the seat and a housing of the base that are configured to define a path of travel of the seat when the seat moves during recline of the backrest from an upright position to a reclined position;
- seat pivotal connections between projections of the backrest and the seat frame of the seat that are configured so that the projections rotate during rotation of the backrest from the upright position to the reclined position to drive the seat frame forward along the path of travel during the recline of the backrest from the upright position to the reclined position;
- backrest pivotal connections between vertically extending members of the backrest and vertically extending members of the housing, the backrest rotating about the backrest pivotal connections and the seat pivotal connections during motion of the backrest between the upright position and the reclined position;
- a first biasing device positioned between the seat frame and the housing, the first biasing device configured to stretch from a first length to a second length that is longer than the first length when the seat is moved forwardly as the backrest is moved from the upright position to the reclined position, the first biasing device configured to bias the seat to a rearward position to bias the backrest to the upright position;
- and
- wherein the seat moves synchronously with rotation of the backrest during recline of the backrest from the upright position to the reclined position.
8 more elements
Dependencies are inferred from the claim text.