Seat pan drop down link
View Patent ↗A chair having an adjustable seat pan is disclosed. The chair includes a seat frame having a front end and a rear end, a seat back attached to the rear end of the seat frame, a seat pan pivotally connected to the seat frame, and a seat drop down link having a first end attached to the seat frame and a second end in contact with a catch member located beneath the seat pan so that the seat pan can be raised and lowered from a flat position to approximately a 6° angle with respect to the seat frame.
1. A chair comprising:
a seat frame having a front end and a rear end;
a seat back attached to the rear end of the seat frame;
a seat pan pivotally connected to the seat frame; and
a seat drop-down link having a first end attached to the seat pan and a second end in contact with a catch member located beneath the seat pan, the drop-down link including:
a catch receiving component connected to an activation attached outboard of the seat pan, said activation component including an activation lever component, said catch receiving component positioned inboard of the seat pan and including:
a first end pivotally attached to the seat pan, said first end including an upper edge;
a second end having a first catch receiving portion; and
a second catch receiving portion proximal to the first end.
2. The chair of claim 1 , wherein the catch member is a transverse support member connecting a first and a second side rail of the seat frame to one another.
3. The chair of claim 2 , wherein the catch member is a spool encircling the transverse support member.
4. The chair of claim 3 , wherein the spool is manufactured of plastic-like material.
5. The chair of claim 1 further comprising a spring having a first end attached to the drop down link and a second end attached to the seat pan.
6. The chair of claim 1 , wherein:
the catch receiving component of the drop-down link has a front edge;
the upper edge forms approximately a 45° angle with the front edge; and
the first catch receiving portion is approximately opposite a vertex formed by the intersection of the upper edge and the front edge when the seat pan is angled approximately 6° with respect to the seat frame.
7. The chair of claim 6 , wherein the front edge of the drop down link is substantially perpendicular to the activation lever when the first catch receiving portion is in contact with the catch member, thereby aligning the seat pan at approximately a 6° angle with respect to the seat frame.
8. The chair of claim 6 , wherein the second catch receiving portion is opposite the vertex of the upper edge and the front edge when the second catch receiving portion is in contact with the catch member, thereby aligning the seat pan with the seat frame.
9. The chair of claim 1 , wherein the vertex of the intersection of the upper edge and the front edge of the catch receiving component forms a pivot point about which the drop-down link rotates.