Chair back with adjustable lumbar support
AssigneeL&P Property Management Company
InventorsRobert Dean Donovan, Nikki Olen White
Life of this patent
Estimating the term…
Abstract
An adjustable lumbar support mechanism for adjusting a position of a lumbar support in a seating unit is provided. The mechanism includes a pair of spaced apart swing links that are pivotally coupled on an upper end to the back frame of the seating unit. The lower free end of each swing link is coupled to a lumbar support. An actuating mechanism is coupled on an upper end to the back frame, and on a lower end is pivotally coupled to the lumbar support. Extending the shaft of the actuating mechanism extends the lumbar support providing additional support to someone sitting in the seating unit.
Claims13
An adjustable lumbar support mechanism for adjusting a position of a lumbar support in a seating unit having a seat back with a back frame, the back frame having a rear side a front side, and a pair of spaced apart back posts, the adjustable lumbar support mechanism comprising:
- a cross rail fixedly coupled to the back frame;
- a pair of spaced apart swing links, each having an upper end and a lower end, the upper end of each swing link pivotally coupled to the back frame;
- a lumbar support having a first side and a second side, the first side being coupled to a lower end of one of the swing links, and the second side being coupled to a lower end of the other of the swing links;
- and
- an actuating mechanism having an extendable shaft coupled to the lumbar support, the actuating mechanism having an upper end, opposite the extendable shaft, pivotably coupled to the cross rail;
- a first cross member bracket mounted to one back post;
- a second cross member bracket mounted to the other back post;
- a cross member coupled to each of the first cross member bracket and the second cross member bracket, and extending therebetween;
- and
- a first swing link bracket fixedly coupled to the cross member, the first swing link bracket pivotally coupled to one of the swing links;
- a second swing link bracket fixedly coupled to the cross member and spaced from the first swing link bracket, the second swing link bracket pivotally coupled to the other of the swing links,
- wherein extension of the extendable shaft of the actuating mechanism moves the lumbar support in a direction away from the rear side of the back frame,
- wherein the lumbar support has a front surface extending between the first side and the second side, the front surface having a convex shape facing the front side of the back frame.
A residential furniture seating unit, comprising:
- a seat spaced above a surface on which the seating unit rests;
- a back extending upwardly from the seat adjacent a rear of the seat, the back including a back frame having a rear side and a front side;
- and
- an adjustable lumbar support mechanism for adjusting a position of a lumbar support in the residential furniture seating unit, the adjustable lumbar support mechanism comprising:
- at least one swing link having an upper end and a lower end, the upper end of the at least one swing link pivotally coupled to the back frame;
- a lumbar support having a first side and a second side, one of the first side or the second side being coupled to a lower end of the at least one swing link;
- and
- an actuating mechanism having an extendable shaft directly coupled to a clevis directly coupled to the lumbar support, the actuating mechanism having an upper end, opposite the extendable shaft, pivotably coupled to the back frame,
- wherein extension of the extendable shaft of the actuating mechanism moves the lumbar support in a direction away from the rear side of the back frame.
Dependencies are inferred from the claim text.