Door reinvented with folding mechanism by Klemens Torggler
This radical redesign of a door by Austrian artist Klemens Torggler uses a folding and pivoting system to collapse and roll to one side.
![Evolution Door by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-by-Klemens-Torggler-Dezeen-1.gif)
Instead of a single panel attached to a frame by two hinges, Torggler's Evolution Door folds into four triangular sections that collapse in on themselves and turn round before straightening back up into a rectangle.
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-1.jpg)
Two halves of the door are attached by pivots at the bottom and top of the frame and a hinge in the middle.
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-2.jpg)
By gently pulling at the joint that connects the two middle panels together, the door folds and slides across the entrance.
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-3.jpg)
"The special construction makes it possible to move the door sideways without the use of tracks," explained Torggler. "This technical trick opens up new applications for the door."
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-4.jpg)
Torggler calls the system Drehplattentür, which translates as the "flip panel door". The artist, based in Vienna, has been working on the concept for a number of years with a series of distinct iterations.
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-5.jpg)
His earliest designs used two metal rods to connect two square panels that would separate then converge in one motion. He developed a second technique that used a cut-out epitrochoid curve with a wheel track that allowed the two panels to move more fluidly than his previous design. The triangular design is his latest.
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-6.jpg)
Torggler has experimented with glass, wood and metal, as well as creating larger double doors and screens to separate entire rooms.
![Evolution Door reinvented with folding mechanism by Klemens Torggler](https://static.dezeen.com/uploads/2014/02/Evolution-Door-reinvented-with-folding-mechanism-by-Klemens-Torggler-Dezeen-7.jpg)
Currently the Evolution Door is a prototype, however a selection of his earlier versions have been made available through website Artelier Contemporary.