Patent ID: 7871130

Claim:
A biarticulating headrest locking mechanism comprising: a positioning assembly movably engaged to a first axis at a first end and to a second axis at a second end; wherein the first end of the positioning assembly pivots about the first axis and the second end of the positioning assembly pivots about the second axis, the positioning assembly comprising adjustment levers having a first end and a second end, the adjustment levers pivotably attached to a body of the positioning assembly; fixed gears, wherein one of the fixed gears at least partially encloses the first axis and one of the fixed gears at least partially encloses the second axis, wherein each fixed gear is immobilized relative to axial movement around the first axis and the second axis; at least one spring circumferentially enclosing the first axis and the second axis; and mobile gears movably connected to the first end of each of the adjustment levers, wherein one of the mobile gears at least partially encloses the first axis and one of the mobile gears at least partially encloses the second axis, wherein each mobile gear is immobilized relative to axial movement around the first axis and the second axis, each mobile gear disposed between the fixed gear and the spring; each of the adjustment levers disposed to pivot when force is applied to the second end thereof and to move each mobile gear away and disengage from each fixed gear.