Finding the actual patent it refers to was surprisingly hard so I spare you the trouble: [1][2]

Note that an industrial design is also registered[3] but it doesn't look as useful for understanding how it works.

[1] https://patents.google.com/patent/US10054990B1/en?oq=1005499...

[2] http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=H...

[3] https://www3.wipo.int/designdb/en/showData.jsp?qi=8-m9YGJqGI...