wo2013026156a1 This seems like an interesting concept but there are no drawings. Will the patent be awarded? Have prototypes been submitted? Are they looking for a manufacturer?
This is a PCT (international) application. I am assuming you found this on google patents. Unlike for U.S. patent documents, they do not show the drawings or provide a button to download a PDF. However you will see links to get to this document on Patentscope, the WPIO search site.
The summary shows a drawing but to see them all you need to go to the drawing tab. There you will see: