thang010146 | Reversible seat back @thang010146 | Uploaded 9 months ago | Updated 2 days ago
This chair is fixed on the floor.
Flip the back to change the chair direction.
It is mainly used for vehicle seats.
The red bolts and nuts are also used as stoppers.
This design ensures the back always tends to reach a vertical position under the effect of gravity (last scene of video).
This mechanism is numbered 1601 in the book “1800 Mechanical Movements, Devices and Appliances”, Gardner D. Hiscox, 1921.