In Greek mythology, Phorcys was a primevil sea god, son of Pontus and Gaia. His wife was Ceto and together they had many children, all hideous monsters collectively known as the Phorcydes.
... extent by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by ...