Back extension backrest

Details Back extension backrest Back extension backrest

A - Human Necessities

47

C

A47C 7/46 (2006.01) A47C 1/024 (2006.01) A47C 7/14 (2006.01)

Patent

CA 2699558

A backrest for use with a chair that has a seat and a base. The backrest includes a lower member having a proximal end and a distal end, and upper member attached to the chair at the proximal end. A spring-hinge mechanism pivotally connects the lower member in the vicinity of the distal end to the upper member. A lumbar support is attached to the upper member and the lower member and spans the spring-hinge mechanism. In use a user sitting on the seat may, by anterior flexing of the user's upper back cause the upper member to pivot relative to the lower member from an unflexed position to a flexed position.

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