Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:


Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Synchronous / Handle


A typical headache during the process of opening and closing a door is that the pulling
force is disturbedalong with the twisting of the door.Synchronous is able to twist separately
from the door's movement, which enables you to open the door by pulling the handle
in one single straight direction.


Donghua University

Donghua University
Shanghai, China

Wu Chunmao,
Donghua University

Go to profile