Schatz linkage

This is a spatial 6-bar linkage, an invention of Paul Schatz (1898-1979, German-born sculptor, inventor and mathematician).
Input: pink shaft.
Center distance of revolute joints of two green links and the yellow link are equal (= a).
Center distance between pink and blue shafts = a*sqrt(3)
The mechanism cannot move if such geometric conditions are not satisfied.
The yellow link has 3D complex motion.
An application: the mixer:
https://youtu.be/h_NQd5ycWr8

STEP files of this video:
https://www.mediafire.com/file/a8wxoigbwszv3so/SchatzLinkageSTEP.zip/file
Inventor files of this video:
https://www.mediafire.com/file/sfe5lsiudz6s8h6/SchatzLinkageInv.zip/file

Видео Schatz linkage канала thang010146